20. Millionaires. From Problem 19, we know that “a 95% con-fidence interval for the mean age of all U.S. millionaires isfrom 54.3 years to 62.8 years." Decide which of the following sen-tences provide a correct interpretation of the statement in quotes.Justify your answers.a. Ninety-five percent of all U.S. millionaires are between the agesof 54.3 years and 62.8 years.b. There is a 95% chance that the mean age of all U.S. millionairesis between 54.3 years and 62.8 years.c. We can be 95% confident that the mean age of all U.S. millionairesis between 54.3 years and 62.8 years.d. The probability is 0.95 that the mean age of all U.S. millionairesis between 54.3 years and 62.8 years.

Given,95% confidence interval for the mean age of allU.S millionaires is from 54.3 years to 62.8…

Answered: 20. Millionaires. From Problem 19, we…

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 company decides to investigate the amount of sick leave taken by its employees. A sample of seven employees yields the following numbers of days of sick leave taken in the past year. 1 1 3 0 0 63 Use this information to answer parts a through c. a. Find and interpret the range. The range is 6 days. Choose the correct interpretation of the range below. A. The largest difference between the mean and any other value is equal to the range. B. The number of days separating the fewest and most sick days taken is equal to the range. C. The range represents the average distance of an observation from the mean. D. The range gives the most useful value for measuring the spread of the data.
The monthly rents (in dollars) paid by 7 people are given below. (Note that these are already ordered from least to greatest.) 790, 930, 1015, 1025, 1060, 1075, 1098 Send data to calculator Suppose that one of the people moves. His rent changes from $790 to $720. Answer the following. (a) What happens to the median? O It decreases by $ O It increases by O It stays the same. (b) What happens to the mean? O It decreases by $ It increases by O It stays the same.
These next questions come after part B. Which of the statements correctly describes the relationship between the mean and median in the histogram of the number of servings of fruit per day claimed by the 7474 seventeen‑year‑old girls? A) The mean and median are about equal because the distribution is right‑skewed. B) The mean is larger than the median because the distribution is right‑skewed. C) The median is larger than the mean because the distribution is right‑skewed. D) There is not enough information to tell us about the relationship between the mean and median in the histogram. (c) In general, you cannot find the exact values of median, quartiles, or mean from the histogram. What is special about the histogram of the number of servings of fruit that allows you to do this? Select an answer choice. A) We know exactly how many observations fall in each bin because of the way the bins are constructed. B) The sample size only consists of only 74…
d. Let’s define a “binge watcher” as someone in the upper 5% of the distribution of minutes watching TV. How many minutes does a “binge watcher” spend per day watching TV? (Round your intermediate calculations and final answer to 1 decimal place.)
8.Suppose you compare the mean of raw data and the mean of the same raw data grouped into a frequency distribution. These two means will be a. Exactly equal. b. The same as the median. c. The same as the geometric mean. d. Approximately equal.
Suppose there are 5 students in a room. The mean age is 19.8 years, and the median age is 19. If the youngest person leaves and is not replaced by another person, what happens to the mean and the median? O The mean and median increase. The mean increases, and the median either increases or stays the same. The mean increases, but it is impossible to determine whether the median increases, decreases, or stays the same. The mean increases, and the median stays the same. The median increases, and the mean either increases or stays the same.

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