Basic Math question and answers for September 13, 2024
- Q During a 5 day period a florist served a different number of customers at a flower shop each day The mean number of daily customers served during this period was...
- Q Stories in the World s Tallest Buildings The number of stories in each of a sample of the world s 24 tallest buildings follows Construct a grouped frequency distribution and...
- Q The frequency table below summarizes a list of the number of words randomly selected students spelled correctly during a spelling bee Find the mean vide your answer below Value 10...
- Q lan wants to figure out if there is a relationship between how much a piece of furniture weighs and how much it costs He samples some items and comes up...
- Q When considering different sampling methods cluster sampling includes the steps list the members of the population use simple random sampling to select a starting point in the population let k...
- Q 1 A city planning board wants to plan activities that would be fun for families So they sent a survey to 100 households to collect information One of the questions...
- Q In a survey of 2035 workers 73 reported working out 3 or more days a week What is the margin of error What is the interval that is likely to...
- Q Shift D Total Avg Head count 95 80 55 45 275 Total 16 14 8 4 42 Year to Date Turnover 90 Day 8 5 2 0 15 This Year...
- Q Fastex Shoes claims that it has designed a new range of lightweight shoes that allow athletes to run faster than they can using any other shoes SportsPlus a rival shoe...
- Q The parallel dotplots below display the number of cars parked for several days in each of two parking lots Parked Cars by Lot Lots A B N 21 2 22...
- Q Transforming random A restaurant sells three sizes of shakes The small medium and large sizes each cost 2 00 3 00 and 3 50 respectively Let X represent the restaurant...
- Q 2 The data in the table shows the times for Men s 500 m Speed Skating event at the Winter Olympics Let x be the number of years since 1980...
- Q X 1 900 2 35 3 500 4 300 EX X X deviation Remember to use commas and round numbers to the nearest tenth X X X X 466 2...
- Q 1 The following table represents the Statisti test scores from your class Find the value for all measures of center Round your answer to the nearest tenth if necessary 100...
- Q Determine the 95 confidence interval for the difference of the sample means Then complete the statements The 95 confidence interval is The value of the sample mean difference is 1...
- Q What is wrong the following conclusion All students in North Carolina should take an online SAT course in order to help improve their score This conclusion came from students at...
- Q Use the given minimum and maximum data entries and the number of classes to find the class width the lower class limits and the upper class limit minimum 20 maximum...
- Q A table below displays the mathematics achievement test scores for a random sample of n 10 college freshmen along with their final calculus grades And we assume there exists a...
- Q Matt and Linda each start the year with 15 vacation days The table below shows how many vacation days each of them had left at the end of each quarter...
- Q You want to obtain a sample to estimac population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 29.4. You would like to be...
- Q Adelaide wants to buy a new generator. The generator costs $2750. Adelaide decides to finance the generator for 36 months at an APR of 11.5%. Determine Adelaide's monthly payment. Round...
- Q The intelligence of the clones of Jango Fett are deteriorating at a rate that has a standard distribution. If the average I.Q of a clone is 90 with a standard...
- Q The power of Darth Vader using the force can lift a speeder 14m off the ground with a thought. The average Sith can lift a speeder 10 meters with a...
- Q Suppose the supply and demand for a certain DVD are given by p=1/6 q2 and p = -1/6q2+44, respectively, where p is price and q is quantity. Find the equilibrium...
- Q Find the mean of the following data set. Assume the data set is a sample. Round your answer to the nearest hundredth, if necessary.22, 29, 30, 35, 18, 30, 31,...
- Q Each voter in a county is given a number that uniquely identifies them. A computer is used to select 500 of these numbers at random. The 500 voters identified by...
- Q One year Alex had the lowest ERA (earned-run average, mean number of runs yielded per nine innings pitched) of any male pitcher at his school, with an ERA of 3.29....
- Q Carter invested $3,900 in an account paying an interest rate of 3.9% compounded daily. Assuming no deposits or withdrawals are made, how much money, to the nearest hundred dollars, would...
- Q Heights of AHS Girls basketball team players are approximately normally distributed with a mean of 70 inches and a standard deviation of 2.5. If there were 175 players, how many...
- Q Describe the sampling distribution of p. Assume the size of the population is 20,000.n = 600, p=0.6Choose the phrase that best describes the shape of the sampling distribution of p...
- Q Suppose a simple random sample of size n = 81 is obtained from a population that is skewed right with =73 and ?=9.(a) Describe the sampling distribution of x.(b) What...
- Q A concrete mix is designed to withstand 3000 pounds per square inch (psi) of pressure. The following data represent the strength of nine randomly selected casts 3960, 4090, 3200, 3200,...
- Q Suppose that a set of test scores is normally distributed with mean 55 and standard deviation 22. What is the probability that score pulled at random is less than 48.4?...
- Q The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 48.7 for a sample of size 981 and...
- Q The expected value when you purchase a lottery ticket is - $2.00 and the cost of the ticket is $8.00. Determine the fair price of the lottery ticket.
- Q Determine the area under the standard normal curve that lies between (a) Z=-1.02 and Z=1.02, (b) Z= -0.36 and Z=0, and (c) Z=-2.19 and Z=0.64.
- Q Professor Ivy's students have a mean class grade of 68 with a standard deviation of 3.5.Express your answers rounded correctly to the hundredths place.A. If Isabel has a grade of...
- Q In a survey, 32 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $33 and standard deviation...
- Q You can insert Desmos graphs or hand-drawn graphs.Draw a normal curve representation for the area, then write the numerical value of the area under the normal curve for each of...
- Q The following data represents the bodytemperature in degrees Fahrenheit of randomly selectedadults:99.5, 98, 99.9, 98.5, 99.2, 100.2, 99, 100.3, 98.8, 98.3Use Excel to compute the values indicated below.Express your answers...
- Q You want to know if smoking rates are different in your state (call this population 1) and your sister's state (call this population 2). Test this at the 5% level...
- Q The following data set represents weightsmeasured in grams of randomly selected MnM plaincandies:0.946, 0.9, 0.868, 0.943, 0.925, 0.9020.851, 0.858, 0.886, 0.948, 0.85Use Excel to compute the values indicated below.Express your...
- Q The average IQ score is 100 points with a standard deviation of 15 points. Jenny says that her IQ is in the 44th percentile. Use this information and a z-table...
- Q Find z when x=87, m=65, and s= 11 using the formula z =x-m
- Q A researcher is interested in determining whether there is a relationship between price and quantity demanded for her firm.
- Q Choose all of the statistical questions.How many texts a day do most high school studentssend?How many texts did you send today?On average, how old are college graduates?When is your birthday?
- Q A normally distributed data set has a mean of 0 and a standard deviation of 2. Which of the following is closest to the percent of values between -4.0 and...
- Q A set of data has a normal distribution with a mean of 50 and a standard deviation of 10.Draw a normal distribution to model these data and find the percent...
- Q Draw a normal curve representation for the area, then write the numerical value of thearea under the normal curve for each of the following.A) All values to the right of...
- Q Wattage Good Defective TotalA quality control inspector is checking a sample of light bulbs. The table summarizes her results. If one of the light bulbs is selected at random, find...
- Q How would you interpret a statistical significance level of 0.48?This means that the probability for the null hypothesis to be false is 0.48.This means that the probability for the null...
- Q Jalen scored 82 in a recent golf tournament. If the mean score in the tournament was 71 with a standard deviation of 3.9, what is Jalen's Z-score? Round to the...
- Q What is the purpose of constructing a confidence interval?In order to find the exact sample proportion.In order to find a range of values to estimate the population proportion.In order to...
- Q The length of human pregnancies varies normally with a mean of 266 days and a standard deviation of 16 days. What percentage of pregnancies last between 234 and 298 days?75%68%95%99.7%
- Q The population in a city is 356,902 people.If this city sees a decline in the population at a rate of 1.4% per year, find the new population after 25 years.A....
- Q An amusement park would like to determine if they want to add in a new rollercoaster. In order to decide whether or not they should add the new roller coaster,they...
- Q A cell phone carrier claims that 90% of customers are very satisfied with the servicethey receive. The local paper thinks the true proportion is lower and decides to testthe claim,...
- Q A company claims that 9% of the items produced on a newmachine are defective.The factory will get rid of the machine if the data indicates that the proportion of defective...
- Q A sample of 500 items produced on a new machine showed that 28 of them aredefective. The factory will get rid of the machine if the data indicates that theproportion...
- Q A grocery store would like to determine whether or not they should continue to sell shortbread cookies.They take a random sample of 550 customers.30% of the customers purchase shortbread cookies.Construct...
- Q When constructing a 99% confidence interval which of the following is true?If you construct 100 intervals, 99 of the intervals will NOT contain the population proportion.When you construct the confidence...
- Q The number of books in a small library increases according to the function B = 7,500 e 0.05t, where t is measured in years. How many books will the library...
- Q You intend to estimate a population mean with a confidence interval. You believe the population to have a normal distribution. Your sample size is 16. Find the critical value that...
- Q In a 2018 study, research finds that 45% of people own an iPhone. It is hypothesised that every year that percentage gets higher. Therefore,in 2019 a research company completes a...
- Q Benji has $3,100 in a savings account which earns 7% interest compounded quarterly. He made noadditional withdrawals or deposits. What was the amount in the account after one quarter?O $3,145.25O...
- Q Suppose that the joint distribution function of X and Yis given byf(x,y)=x+yIf 0<x< 1 and 0 <y< 1, and 0 otherwise, find:a. the marginal density of Xb. the marginal density...
- Q The weights (to the nearest five pounds) of 34 randomly selected male college students are organized in the histogram. Use the graph to find the median weight.
- Q Tyler is investigating how long his phone's battery lasts (in hours) for various brightness levels (on a scale of 0-100). His data is displayed in the table and graph below.
- Q Suppose a survey of 551 women in the United States found that more than 63% are the primary investor in their household. Which part of the survey represents the descriptive...
- Q A random sample of 225 observations were selected from a population with a mean ? = 20 and variance ?2 = 144.Find mean and standard deviation of the sampling distribution...
- Q The null and alternative hypotheses are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed. What parameter is being tested? Ho: 0 = 5 H?: 0 # 5...
- Q Describe the sampling distribution of p. Assume the size of the population is 30,000.n=1300, p=0.288Describe the shape of the sampling distribution of p. Choose the correct answer below.A. The shape...
- Q Below is a sample of share prices (in dollars) for a particular stock, selected at random over several years:242 253 261 269 271 235 240 242 230259 243 242 274...
- Q A research center claims that 31% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of...
- Q Professor Ivy has the following scores on her final exam:76, 51, 81, 57, 62, 70, 9841, 50, 100, 86, 93, 48Compute the values indicated below. Express your answers rounded to...
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