Basic Math question and answers for September 23, 2023
- Q The following table shows ceremonial ranking and type of potterysherd for a random sample of 434 sherds at an archaeologicallocation.Ceremonial RankingCooking Jar SherdsDecorated Jar Sherds (Noncooking)Row TotalA9045135B9649145C8074154Column Total266168434Use a chi-square...
- Q The following data was collected to explore how the number ofsquare feet in a house, the number of bedrooms, and the age of thehouse affect the selling price of the...
- Q High-profile legal cases have many people reevaluating the jurysystem. Many believe that juries in criminal trials should be ableto convict on less than a unanimous vote. To assess support forthis...
- Q A group of biochemistry researchers developed a new medicationfor treating depression. To assess if the new medication iseffective at treating depression, the researchers obtained a sampleof depressive patients from a...
- Q How does gender and occupational prestige affect credibility?Graduate students in a public health program are asked to rate thestrength of a paper about the health risks of childhood obesity. Inreality,...
- Q DescriptionHere is some data looking at people's salaries, their years ofexperience, and their average evaluation. Please cut and paste itinto excel and run the following regression:Salary = b0 + b1*Experience...
- Q A researcher is studying the effects of inserting questions intoinstructional material for learning. There is doubt whether thesequestions would be more effective before or after the correspondingpassage. In addition, the...
- Q How do I calculate the y intercept, slope, and MSE?
- Q A shop sells helium balloons in eight different colours: red,pink, yellow, blue, green, purple, black and silver. (a) How manydifferent selections of 16 helium balloons can be purchased if theshop...
- Q with 90% confidence, for sample mean 375.00 sample standarddeviation 12.80 and sample size 35, what is the upper confidencelimit with 2 decimal places
- Q Nine samples of PVC pipe of equal wall thickness are testedunder three temperature conditions to failure, yielding the resultsshown below. Research questions: Is mean burst strengthaffected by temperature level? Is...
- Q In a test of the effectiveness of garlic for lowering?cholesterol, 43 subjects were treated with garlic in a processedtablet form. Cholesterol levels were measured before and after thetreatment. The changes...
- Q I need to know how to answer this question only in Excel. Pleaseinclude instructions, screenshots, etc. in Excel which explain theprocess (formulas included).TropSun is a leading grower and distributer of...
- Q Compute each of the following:a. F1+F2+F3+F4+F5b. F1+2+3+4c. F3xF4d. F3X4Given that FN represents the Nth Fibonacci number, and that F31=1,346, 269 and F33 = 3,524,578, find the following: a. F32 b.F3425....
- Q Problems 16 through 18 refer to the following preferenceschedule.14,12, 10, 7, 61st A B D C C2nd C C C B B3rd B D A A D4th D A B...
- Q It costs a pharmaceutical company $75,000 to produce a1,000-pound batch of a drug. The average yield from a batch isunknown but the best case is 90% yield (that is, 900...
- Q The Twister Roller Coaster always has a long line of thrillseekers waiting to take a ride on it. A random sample of 60 riderswaited in line a mean time of...
- Q You wish to test the following claim ( H a ) at a significancelevel of ? = 0.02 . H o : ? = 61.5 H a : ? ?...
- Q To see if a spinner that is divided into 100 equal sectionslabeled 1 to 100 is fair, a researcher spins the spinner 1000 timesand records the result. Let X represent...
- Q 10-1Researchers in a populous country contacted more than? 25,000inhabitants aged 22 years to see if they had finished high? school;81.7%of the 12,858 males and 80.1?% of the 12,957 females indicatedthat...
- Q In a study relating consumption expenditure (Y) on income (X2)and wealth (X3) based on 10 observations , the following equationwas obtainedYhat = 24.337 + 0.08764X2 - 0.0349X3 SE (6.2801) (0.31438) (0.0301) ...
- Q Phil wishes to compare the weights of professional athletes tothe weights of non-professional athletes. Phil completes a simplerandom sample of professional athletes and records his results inpounds:125 147 240 186...
- Q Please do the math by hand, do not use a program, I need to seethe procedure, the answer itself is less important.Comparison of peak expiratory flow rate (PEFR) before and...
- Q Case 1 Instruction (Accounting Application) Use the MS Exceltabular graphical methods of descriptive statistics to summarizethe sample data in the data set named PelicanStores in Case 1folder. The managerial report...
- Q I would like to know if the sex of a math student is astatistically significant factor in predicting average math examscores. The following lists are exam scores for a math...
- Q Homework 5, MAT 327/782, Fall 2018For the R computations, submit the R commands you used andtheir output, either by taking a screenshot or by copying them intoa text file. Submit...
- Q Use the Central Limit Theorem to find the mean and standarderror of the mean of the sampling distribution. Then sketch a graphof the sampling distribution. The mean price of photo...
- Q 1) Using the tdist function, calculate exact p-values for a twotailed test for the following test statistics (6 points)a) 2.14, df = 79 (2 points) b) 3.68, df = 13...
- Q You are conducting a multinomial Goodness of Fit hypothesis testfor the claim that the 4 categories occur with the followingfrequencies:H o : p A = 0.15 ; p B =...
- Q this question, but calculate the 90% confidence intervalfor the coefficient for cable by hand (but use the SE fromthe software output) and do the test whether age andnumber of TVs...
- Q A random variable X has a distribution p(X=k) = A / (k(k+1)), k= 1,2,...,4, where A is an constant. Then compute the value ofp(1<=X<=3)The answer will be either: 2/3, 3/4,...
- Q SHOW ALL WORK1) The following is a list of prices (in dollars) of birthday cardsfound in various drug stores:2.451.200.851.332.252.252.092.991.000.881.422.362.152.851.521.992.380.852.222.75a.Using R find the mean, median, mode, range, variance and standard deviationof...
- Q “Please discuss why statistics are important today. In yourresponse include a statistic that is important to you. how do youknow that this statistic is valid?”not sure what to write for...
- Q Given the age ( M = 19.83, SD = 3.07) ofparticipants attending a kickboxing class, please answer thefollowing:a. Between what values do 68% of the data lie?_______________b. Between what values...
- Q A) A missile launched from a submarine hits a target with aprobability of 0.5. If hits from three missiles are required todestroy the target, ? What is the probability that...
- Q Perform a linear correlation study on the highest paidbasketball players for the 2018-19 season. What is the correlationbetween the average points they score per game and theirsalary?PlayersPoints (x)Pay ( Million)...
- Q Never forget that evensmall effects can be statistically significant if the samples arelarge. To illustrate this fact, consider a sample of 104 smallbusinesses. During a three-year period, 10 of the...
- Q The average number of cocktails that residents of my nursinghome drink weekly is normally distributed with mean of 12 cocktailswith a standard deviation of 3 cocktails. If you take severalgroups...
- Q A social psychologist is interested in how optimism is relatedto life satisfaction. A sample of individuals categorized asoptimistic were asked about past, present, and projected futuresatisfaction with their lives. Higher...
- Q How does gender and occupational prestige affect credibility?Graduate students in a public health program are asked to rate thestrength of a paper about the health risks of childhood obesity. Inreality,...
- Q A manufacturing company measures the weight of boxes beforeshipping them to the customers. If the box weights have apopulation mean and standard deviation of 90 lb and 24 lb,respectively, then...
- Q 11. (10 pts total) One measure of quality and customersatisfaction is repeat business. A supplier of paper used forcomputer printouts obtained a random sample of 80 customer accountsfrom 2014 and...
- Q Calculate the probability of ending up with an odd number ofSpade cards when 5 cards are sampled uniformly at random from afull deck of 52 cards. (assume sampling is one-at-a-time)
- Q The following table is based on a random sample conducted ofhigh school seniors and their parents by Jennings and Niemi, inwhich they explore the party identification of parents and theirchildren.Student...
- Q You are curious as to whether the law actually does reducehighway deaths. Using information in the table below, perform anappropriate test to determine whether speed limits are associatedwith lower traffic...
- Q Apply the 68-95-99.7 rule to answer the question. The systolicblood pressure of a group of 18-year-old women is normallydistributed with a mean of 113 mmHg and a standard deviation of...
- Q subject group pre1 pre2 post1 post2 post31 B 4 3 5 ...
- Q You wish to test the following claim ( H a ) at a significancelevel of ? = 0.10 . For the context of this problem, ? d = ? 2...
- Q Suppose now that you open the lollipops to find out that youhave 9 red, 6 green, 10 orange, and 15 blue. Test the nullhypothesis that the colors of the lollipops...
- Q Share with your peers the null and alternative hypotheses for adecision that is relevant to your life. This can be a personal itemor something at work. Define the population parameter,...
- Q Let X1,X2,… be a sequence of independent random variables,uniformly distributed on [0,1]. Define Nn to be the smallest k suchthat X1+X2+?+Xn exceeds cn=n2+12n???, namely,Nn=min{k?1:X1+X2+?+Xk>ck}Does the limitlimn??P(Nn>n)exist? If yes, enter its...
- Q Learning ObjectivesUnderstand when and how Chi-square testing isused.Become proficient with the Chi-square analysis inSPSS.Gain more experience with customizing statisticalcalculations in Excel.Perform a basic interpretation of a Chi-Squareanalysis.Using Chi SquareUsing a...
- Q Salmon Weights: Assume that the weights ofspawning Chinook salmon in the Columbia river are normallydistributed. You randomly catch and weigh 18 such salmon. The meanweight from your sample is 22.2...
- Q Q: The mars company claims that 13 percent of M&Ms plaincandies distributed into bags are brown. Investigate this claimwith an appropriate hypothesis test. Use a significance level of a=0.05ColorCountBrown33Non-Brown242Total2751. The...
- Q Suppose that 3 balls are chosen from an urn which contains 5red, 6 white and 10 blue balls. Assume X and Y represents,respectively, the number of red balls chosen and...
- Q The objective of the question is to test the HypothesisIf the Mean travel time in minutes between Point A to Point B isequal to the mean of the travel time...
- Q For a sample of 10 individuals, aresearcher calculates residuals for the relationship between“number of delinquent friends” and “number of prior arrests” andfinds that the positive residuals = 125. The researcher...
- Q Fora sample of 10 individuals, a researcher calculates residuals forthe relationship between “number of delinquent friends” and “numberof prior arrests” and finds that the positive residuals = 125. Theresearcher then...
- Q Let x = age in years of a rural Quebec woman at thetime of her first marriage. In the year 1941, the populationvariance of x was approximately ?2 =5.1. Suppose...
- Q 1. When discussing the concept of risk, what type of outcomesare we considering (negative outcomes or positiveoutcomes)? (For example, would we talk about therisk of DYING from heart failure OR the...
- Q An obstetrician wants to know whether or not the proportions ofchildren born on each day of the week are the same. She randomlyselects 500 birth records and obtains the data...
- Q Three students, Linda, Tuan, and Javier, are given laboratoryrats for a nutritional experiment. Each rat's weight is recorded ingrams. Linda feeds her rats Formula A, Tuan feeds his rats FormulaB,...
- Q Do the following sets of vectors span R^3?1) [1,3,1], [3,9,4], [8,24,10], [-10,-30,-13]2) [1,2,3], [-1,-2,-4], [1,2,2]3) [-1,-3,-1], [-4,-12,-3]4)[1,2,-2], [7,5,7], [-4,-1,-11]
- Q What are two ways to test the equality of populationvariances? Explain in detail.
- Q There are 723 seniors at a large high school.(a) Explain how you would use a random number table to select arandom sample of 30 seniors. Explain your method clearly! I...
- Q 1. A company make profits of $22,000 on each of its fivelow end products $50,000 for each of the two mid end ones and$270,000 from one top product. The number...
- Q 4-2.5 In a class of 50 students, the result of a particularexamination is a true mean of 70 and a true variance of 12. It isdesired to estimate the mean...
- Q For this assignment, you will create a cross tabs and conduct achi-square test of independence. Begin by asking some of yourfriends or acquaintances (you'll need both males and females) whattheir...
- Q ##The same researchers from the Population Council arecontinuing their investigation of the focal relationship betweenGDP per capita and fertility rates across countries. In order toconfirm the existence of the focal...
- Q Sales of single-family houses have been brisk in Mid City thisyear. This has especially been true in older, more establishedneighborhoods, where housing is relatively inexpensive compared tothe new homes being...
- Q Two types of plastic are suitable for use by an electroniccalculator manufacturer. The breaking strength of the plastic isimportant. From random samples of n1 = 10 and n2 = 12...
- Q Siberian Charter Adventures is an independent Canadian companyfocused on providing unique charter tours to Siberia. The companyhas averaged between 1,000 and 1,500 tourists per month, and theoperations manager wants to...
- Q If an IQ distribution is normal and has a meanof 100 and a standard deviation of 15, then 99% of all those takingthe test scored between IQ's ofA. 0 and...
- Q Which test is used when looking at comparison of means from asingle dependent variable among two or more groups or samples?
- Q Let (X1, X2) have a bivariate normal distribution with meanvector (µ1, µ2), variance ? 12 for X1 and ? 22 for X2 and correlation cor(X1, X2) = ?.(a) Write down...
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