You may need to use the appropriate appendix table or technology to answer this question.Accounting Today reports that the mean preparation fee for an itemized 1040 and state return in 2020 was $302. Use this price as the population mean and assume the population standard deviation of preparation fees is $100.(a) What is the probability that the mean price for a sample of 40 federal income tax returns is within $16 of the population mean? (Round your answer to four decimal places.)(b) What is the probability that the mean price for a sample of 70 federal income tax returns is within $16 of the population mean? (Round your answer to four decimal places.)(c) What is the probability that the mean price for a sample of 121 federal income tax returns is within $16 of the population mean? (Round your answer to four decimal places.)(d) Which, if any, of the sample sizes in parts (a), (b), and (c) would you recommend to ensure at least a 0.95 probability that the sample mean is within $16 of the population mean? (Select all that apply.)40 customersO 70 customers121 customersOnone of the above

The population mean: The population standard deviation: Sample sizes: , , and

Answered: You may need to use the appropriate…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A student studying statistics wants to look at data for his favorite sport, American football. He collects data on the lengths of 100 field goals from various games over several seasons. Would it be more appropriate to find a sample standard deviation or population standard deviation in this situation? Select the correct answer below: A. Sample standard deviation B. Population standard deviation
Identify the symbols used for each of the following: (a) sample standard deviation; (b) population standard deviation; (c) sample variance; (d) population variance. a. The symbol for sample standard deviation is b. The symbol for population standard deviation is c. The symbol for sample variance is d. The symbol for population variance is
Another measure of variation is the mean absolute deviation. It is computed using the formula MAD=∑|xi−x|n. Compute the mean absolute deviation of the sample data shown below and compare the results with the sample standard deviation. $976, $2035, $918, $1899
Which of the following is an example of doing inferential statistics? You calculate the average grade on an exam in a class of 5th grade math students to see if they did better or worse than last year. You lookup the median and the standard deviation of the age for the U.S. population from U.S. Census data. You use a sample of homes in Rancho Cucamonga to draw a conclusion about the mean home price for all Rancho Cucamonga homes. You compare the distributions of scores for two Social Science 10 classes to see which class did better on the exam.
Answer the following question from the distribution represented bythe histogram below. How much can there be at most data that is smaller thanthe median estimate ?
Use technology to solve the following problem: A normal population has a mean = 31 and standard deviation = 7. What is probability that a randomly chosen value will be greater than 18?
Suppose that the value of a stock varies each day from $12.82 to $19.17 with a uniform distribution. Find the third quartile, i.e., 75% of all days the stock is below what value? Round your answer to the nearest cent.
Scores on an aptitude test are normally distributed with a mean of 960 and standard deviation of 120. Use the Cumulative Z-Score Table to answer the following questions. Write your answer rounded to the nearest whole number. If 1,570,000 students take the test.. how many would you expect to score above 1224? students ...how many would you expect to score above 972? students ...how many would you expect to score between 972 and 1224? students
Step 1: Although cities encourage carpooling to reduce traffic congestion, most vehicles carry only one person. For example, 70% of vehicles on the roads in the Minneapolis-St. Paul metropolitan area are occupied by just the driver. You choose 84 vehicles at random. What are the mean and standard deviation of the proportion of vehicles in your sample that carry only one person? (Fill in the blanks below.) The mean is (1) . (Give your answer to 1 decimal place.) (2) The standard deviation is (Give your answer to 2 decimal places.) eBook Answer 1 Answer 2
Read the following prompt and complete 3.a and 3.b
(See photo) The data set on the left represents the annual rate of return (in percent) of eight randomly sampled bond mutual funds, and the data set on the right represents the annual rate of return (in percent) of eight randomly sampled stock mutual funds. What proportion of the observations is within one standard deviation of the mean for each data set?
Number of persons in the household 1 2 A. Below is a distribution of the variable "hompop" from the 2016 General Social Survey dataset. This variable is a measure of the number of people in each respondent's household. Use the table to answer the following questions. 3 4 5 7 8 9 10 11 Total www Freq. 850 1,069 436 278 139 58 19 2,867 percent 29.65 37.29 15.21 9.70 4.85 2.02 0.66 0.31 0.24 0.03 0.03 100.00 Cum. 29.65 66.93 82.14 91.84 96.69 98.71 99.37 99.69 99.93 99.97 100.00 1

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