Listed below are the amounts of net worth (in millions of dollars) of the ten wealthiest celebrities in a country.Construct a 95% confidence interval. What does the result tell us about the population of all celebrities? Do thedata appear to be from a normally distributed population as required?242195191173166154145What is the confidence interval estimate of the population mean µ?million

Here, the given data values are :-242 , 195 , 191 , 173 , 166 , 154 , 145 , 145 , 145 , 140 Sample…

Answered: Listed below are the amounts of net…

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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In a survey, 16 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $36 and standard deviation of $16. Construct a confidence interval at a 90% confidence level.Give your answers to one decimal place._____ ± _____
You are interested in finding a 98% confidence interval for the average commute that non-residential students have to their college. The data below show the number of commute miles for 11 randomly selected non-residential college students. Round answers to 3 decimal places where possible. 18 18 27 17 15 7 11 15 9 12 19 a. With 98% confidence the population mean commute for non-residential college students is between _____ and____miles. b. If many groups of 11 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.
In 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 $47 and standard deviation of $9. Construct a confidence interval at a 80% confidence level.Give your answers to one decimal place.________ ± ________Interpret your confidence interval in the context of this problem.
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.
The heart rates for a group of 17 students taking a final exam are given below. Assume heart rates are normally distributed. Use a TI-83, TI-83 plus, or TI-84 calculator to find the 95% confidence interval for the true population mean. Round your answers to two decimal places and use increasing order. Beats per minute 92 101 93 89 93 89 92 95 86 93 96 93 96 87 94 97 101
In a survey, 21 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $30 and standard deviation of $14. Construct a confidence interval at a 80% confidence level.Give your answers to one decimal place. ______ ± _______
A laboratory tested 85 chicken eggs and found that the mean amount of cholesterol was 191 milligrams. Assume that o = 16.2 milligrams. Construct a 95% confidence interval for the true mean cholesterol content, µ, of all such eggs. Round to one decimal place. O A. 186.9 to 195.1 milligrams B. 186.5 to 195.5 milligrams C. 188.1 to 193.9 milligrams D. 187.6 to 194.4 milligrams
Use the sample information. X = 40, 0 = 4, and n= 20 to calculate the following confidence intervals assuming the sample is from a normal population. A. 90% confidence from____to____ (Round 4 decimal places.) B. 95% confidence interval is from_____to_____ (Round 4 decimal places.) C. 99% confidence interval is from______to_____ (Round 4 decimal places.) D. Describe how the intervals change as you increase the confidence level. A. The interval gets narrower as the confidence level increases B. The interval gets wider as a confidence level decreases C. The interval gets wider as a confidence level increases D. The interval stays the same as the confidence level increases
#3
You are interested in finding a 90% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for 13 randomly selected college students. Round answers to 3 decimal places where possible. 7 8 8 0 2 11 6 10 2 0 1 3 1 With 90% confidence the population mean number of days of class that college students miss is between and days.
Researchers studied the mean egg length (in millimeters) for a bird population. After taking a random sample of eggs, they obtained a 95% confidence interval of (45,60). What is the value of the margin of error? Choose the correct answer below. A. 15 mm B. 52.5 mm O c. 7.5 mm O D. 1.96
In a survey, 28 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $44 and standard deviation of $6. Construct a confidence interval at a 98% confidence level.Give your answers to one decimal place._______________ ± _______________Interpret your confidence interval in the context of this problem.

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