A survey of 31 randomly selected iPhone owners showed that the purchase price has a mean of $610 with a sample standard deviation of $26. (Use z Distribution Table.) a. Compute the standard error of the sample mean. (Round your answer to the nearest whole number.) Standard error $ 5 b. Compute the 95% confidence interval for the mean. (Use tDistribution Table.) (Round your answers to 3 decimal places.) The confidence interval is between and c. To be 95% confident, how large a sample is needed to estimate the population mean within $9? (Round up your answer to the next whole number.) Sample size

A survey of 31 randomly selected iPhone owners showed that the purchase price has a mean of $610 with a sample standard deviation of $26. (Use z Distribution Table.) a. Compute the standard error of the sample mean. (Round your answer to the nearest whole number.) Standard error $ 5 b. Compute the 95% confidence interval for the mean. (Use tDistribution Table.) (Round your answers to 3 decimal places.) The confidence interval is between and c. To be 95% confident, how large a sample is needed to estimate the population mean within $9? (Round up your answer to the next whole number.) Sample size

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

You are interested in finding a 95% confidence interval for the average commute that non- residential students have to their college. The data below show the number of commute miles for 14 randomly selected non-residential college students. Round answers to 3 decímal places where possible. 24 7 5 15 23 7 13 15 27 16 12 16 19 21 a. To compute the confidence interval use a ? distribution. b. With 95% confidence the population mean commute for non-residential college students is between and miles. c. If many groups of 14 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About these confidence intervals will contain the true population mean number of commute miles and about percent of percent will not contain the true population mean number of commute miles.
The standard deviation and the mean of 25 students scores are 10 and 38, respectively. Construct a 99% confidence interval.
Please help me with this question.
You are interested in finding a 95% confidence interval for the mean number of visits for physical therapy patients. The data below show the number of visits for 12 randomly selected physical therapy patients. Round answers to 3 decimal places where possible.
See the graph of data below to answer the following question Obtain a 95% confidence interval for the difference between the mean rates of return. Interpret the interval.
A developmental psychologist believes that children’s self-esteem scores change with age. She measures N=8 children’s self-esteem in 3rd grade and again in 6th. Evaluate the results of her data using α = .052tail. **Attached Image** a. Show how the 95% confidence interval was calculated. b. State the conclusion in APA format. c. What is Cohen’s d?
You are interested in finding a 90% confidence interval for the average commute that non-residential students have to their college. The data below show the number of commute miles for 14 randomly selected non-residential college students. Round answers to 3 decimal places where possible. 5 8 11 10 12 19 24 6 26 10 26 10 26 15 a. To compute the confidence interval use a distribution. b. With 90% confidence the population mean commute for non-residential college students is between and miles. c. If many groups of 14 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of commute miles and about percent will not contain the true population mean number of commute miles.
do the last one please
The accompanying table shows data for the weights of backpacks for men and women. Assume that the data are from random samples and the distributions are Normal. Complete parts (a) and (b) below. E Click the icon to view the data table. a. Find a 95% confidence interval for the difference between means HFemale - HMale state whether it captures 0, and explain what that shows about the mean. The 95% confidence interval is ( D (Round to two decimal places as needed. Use ascending order.) Backpack weights Female Male 10 10 12 8 9. 7 5 10 7 20 3 11 8 14 13 11 14 6 7 22 11 12 15 10 17 22 10 7 25 11 7 15 11 11 4 16 13 20 21 15 10 9. 16 10 15 13 10 10 17 12 11 38 6. 6. 7 19 12 13 20 8 14 15 18 19 10 16 16 13 18 12 14 13 13 15 14 14 7 7 14 13 27 11
Use the histogram below to build a 95% confidence interval of the average heart rate of a person. Put your two numbers below in the spaces provided. Round to one decimal: ex: 98.2 The histogram visualizes the results of doing one thousand studies just like above. We are 95% confident that the average heart rate of a person is between ____and_____ All information needed to answer this problem is present. There is no missing information to this question.
form a confidence interval for mean, proportion, and standard deviation.
n a survey, 23 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $31 and standard deviation of $17. Construct a confidence interval at a 95% confidence level.Give your answers to one decimal place. +-Interpret your confidence interval in the context of this problem.