rk: Chapter 8 (Sections 8.1 through 8.5)SavedA random sample of 16 pharmacy customers showed the walting times below (In minutes).16212024171113201918162421212016Click here for the Excel Data FleFind a 90 percent confidence Interval for p, assuming that the sample Is from a normal population. (Round your standard devlatlonanswer to 4 declmal places and t-value to 3 declmal places. Round your answers to 3 declmal places.)The 90% confidence intervalto

Answered: Image /qna-images/answer/25d523fc-3440-46b0-ad8e-e312b6aa1067.jpg

Answered: A random sample of 16 pharmacy…

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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QUIZt! Directions: Read and analyze the following problems. Write your answers on a sheet of раper. 1. Write the confidence interval for u given the population standard deviation o, the sample size n, and the confidence level C. Assume that the population is normally distributed. a. o = 3, n = 9, C = 90% b. =27, o = 5, n= 65, C=99% C. = 105, o = 24, n= 100, C= 80.30% d. x=1206, o = 143, n = 10, C= 78.14% 2. Given a random sample with size 39 taken from a normally distributed population or 200 members, having a sample mean of 66 and a population standard deviation of 11. Construct a 96% confidence interval to estimate the population mean.
The chancellor wants you to do a research study on the number of hours students report sleeping in a typical day. You select a random and representative sample of 25 students and ask them to report the number of hours they sleep in a typical day. Tehe data below are in hours. 5 7 3 8 9 8 6 4 10 7 9 7 5 11 8 4 2 6 8 6 10 8 6 8 9 Calculate a 95% confidence interval for the sample mean. Round your final answer to the hundredth place. What t score was used in calculating your confidence interval for the question above? *Your analysis of the raw data indicates that 13 of 25 students reported sleeping no more than 7 hours per day* Calculate a 95% confidence interval for the sample proportion. Round to the nearest hundredth place.
Please fill in the empty boxes to B & C
Construct a confidence interval for the ratio of the population variances given the following sample statistics. Round your answers to four decimal places. n1=9, n2=18, s1^2/s2^2=1.17, a=0.1
You do a study of hypnotherapy to determine how effective it is in increasing the number of hours of sleep subjects get each night. You measure hours of sleep for 12 subjects with the following results. Construct a 90% confidence interval for the mean number of hours slept for the population (assumed normal) from which you took the data. (Give your answer rounded to the nearest 4 decimal places if necessary.) {7.8, 8.9, 9.5, 11.2, 11.5, 8.3, 11.8, 8.4, 8, 8.4, 10.1, 10.3} (?,? )
The EPA tests cars for city miles per gallon (mpg). For one model, a sample of 16 cars were tested for mpg, the results follow. 28 25.7 25.8 28 28.5 29.8 30.2 30.4 26.9 28.3 29.8 27.2 26.7 27.7 29.5 28 Find the 95% confidence interval for mean mpg. Find the 99% confidence interval for mean mpg.
A sample of size 50 will be drawn from a population with mean 76 and standard deviation 14. Find the 69th percentile of x.
Tina catches a 14-pound bass. She does not know the population mean or standard deviation. So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds. Find the t and calculate a 95% (α = .05) confidence interval.
An Internet retailer would like to investigate the relationship between the amount of time in minutes a purchaser spends on its Web site and the amount of money he or she spends on an order. The table to the right shows the data from a random sample of 12 customers. Construct a 99% confidence interval for the regression slope. Construct a 99% confidence interval for the slope. LCL = and UCL = (Round to three decimal places as needed.) C Time 20 12 28 22 1 13 Order Size $71 $23 $93 $198 $54 $35 Time 5 37 8 37 25 8 Order Size $57 $360 $122 $161 $72 $248
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
12.1.50 Question Help A poll of 1070 adults in a country was conducted by telephone. Of those surveyed, 173 had experienced the death of at least one family member or close friend within the last 10 years who died after the removal of life support. Find and interpret a 90% confidence interval for the proportion of all adults in the country who had experienced the death of at least one family member or close friend within the last 10 years after life support had been withdrawn. Click here to view page 1 of the table of areas under the standard normal curve. Click here to view page 2 of the table of areas under the standard normal curve. The 90% confidence interval is from to. (Round to three decimal places as needed.)

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