Statistics question and answers for August 27, 2023
- Q Find a value of the standard normal random variable z ​, call itz 0​, such that the following probabilities are satisfied.a. ​P(z less than or equals z 0​) equals 0.3027b....
- Q Each year about 1500 students take the introductory statisticscourse at a large university. This year scores on the final examare distributed with a median of 74 points, a mean of...
- Q Suppose x is a normally distributed random variable with muequals 43 and sigma equals 5. Find a value x 0 of the randomvariable x that satisfies the following equations or...
- Q Introduction:Find a list of at least five related numbers. Compute statisticsabout the data, and give your interpretation.Prompt:Analyze the data you have gathered.Possible sources include the 2010 census, Yahoo finance, and...
- Q . Develop a simple linear regression model to predict a person’sincome (INCOME) based upon their years of education (EDUC) using a95% level of confidence.a. Write the reqression equation.b. Discuss the...
- Q Explain thoroughly the distinctions between the following pairsof terms:(a) Parameter and statistic(b) Sample size and number of samples
- Q Bigger sample is not always better – one ofthe worst statistical mistakes ever made in the history ofstatistics happened in the 1936 U.S. Presidential Election. Theincumbent president Franklin Roosevelt of...
- Q 1. In the following two situations,either stratified random sampling method or cluster sampling methodis used.(1) Identify the sampling method used,and (2) briefly justify your choice.To get an idea of how...
- Q In a survey, people were asked to \"randomly pick a whole numberbetween 1 and 20\" Here are the responses3Â Â 3Â Â 3Â Â 4Â Â 4Â Â 5Â Â 7Â Â 7Â Â 7Â Â 8Â Â 11Â Â 12Â Â 13Â Â 13Â Â 13Â Â ...
- Q 1.A sample of customers in a grocery store were asked the amountthey spent at the grocery store and the number of household membersfor whom they currently shopped. The results are...
- Q The breaking strength of yarn used in the manufacture of wovencarpet material is Normally distributed with σ = 2.4 psi. A randomsample of 16 specimens of yarn from a production...
- Q describe an example that uses discrete probabilitiesor distributions. Provide an example that follows either thebinomial probabilities or any discrete probability distribution,and explain why that example follows that distribution. In yourresponses...
- Q Suppose that test scores on the Graduate Management AdmissionTest (GMAT) are normally distributed with a mean of 530 andstandard deviation of 75.a. What GMAT score separates the highest 15% of...
- Q Converting P(0.15 ≤ p ≤ 0.19) to the standard normal randomvariable z for a sample of 500 households gives P(−1.19 ≤ z ≤1.19). This is the probability that a sample...
- Q The table lists heights (in.) of fathers and the heights (in.)of their first sons.Height of father (x)73.075.575.075.075.074.074.073.073.078.5Height of first son (y)74.073.571.070.572.076.574.071.072.073.2Find the linear correlation coefficient rPredict the height of a...
- Q Pierre works five days a week. He has 12 shirts, 8 pants, 8ties, and 4 jackets that he can wear to work. Of these, 4 shirts, 3pants, 2 ties, and...
- Q You are interested in testing whether stock volatility,controlling for size and overall market returns, has an impact onreturns. You conduct a regression on 89 observations, using monthlyreturns, specified as follows:...
- Q John wishes to study the heights of the women’s basketball team.He completes a simple random sample of women’s basketball teammembers. 70 71 69.25 68.5 69 70 71 70 70 69.5...
- Q Below is collected data of the question \"how manykisses have you eaten in the past day?\"This is between men and women.The tables are these:Male: 4, 2, 3, 1, 3, 2,...
- Q acertain state has the highest high school graduation rate of allstates at 80%A. In a random sample of 20 high school students from thestate, what is the probability that 17...
- Q Have you ever noticed that, when you tear a fingernail, it tendsto tear to the side and not down into the finger? (Actually, thelatter doesn’t bear too much thinking about.)....
- Q Assume that systolic blood pressure for adult women is normallydistributed with a mean of 125.17 with a variance of 107.0. Anindividual woman is selected from the population. Find thefollowing probabilities.What...
- Q 1. did we underestimate the age of the gentlemen? please use thedata in the spreadsheet to address this question. Use alpha = 0.01.the true age of the gentlemen is 66...
- Q 1) Let   x be a continuous random variable thatfollows a normal distribution with a mean of 321 and a standarddeviation of 41.(a) Find the value of   x > 321 sothat...
- Q David Anderson has been working as a lecturer at Michigan StateUniversity for the last three years. He teaches two large sectionsof introductory accounting every semester. While he uses the samelecture...
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