Suppose that employees at a large company have salaries that are normally distributed, with a mean of $24 per hour, and a standard deviation of $1.60 per hour. a. What percentage of all employees earn less than $25 per hour? b. What percentage of all employees earn more than $26.50 per hour? c. What percentage of all employees earn between $21 and $24 per hour?

Suppose that employees at a large company have salaries that are normally distributed, with a mean of $24 per hour, and a standard deviation of $1.60 per hour. a. What percentage of all employees earn less than $25 per hour? b. What percentage of all employees earn more than $26.50 per hour? c. What percentage of all employees earn between $21 and $24 per hour?

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

40. Although there is some controversy around the precise average body temperature of adults, new data suggest that the mean is 98.2° with a standard deviation of 0.6° and has a bell-shaped distribution. a. According to this distribution, approximately what percentage of body temperatures are between 97° and 99.4°? b. Approximately what percentage of temperatures are greater than 98.8°? c. Approximately what percentage of temperatures are no more than 98.2°?
3. Assume that songs the lengths of songs released in 2020 are normally distributed with a mean of 210 seconds and a standard deviation of 37 seconds. Find the following Percent of songs that were less than 2 minutes 30 seconds (150 seconds) b. Percent of songs that were over 4 minutes long (240 seconds) Percent of songs that were between 3-4 minutes long. a. С.
Assume Springfield house prices are Normally distributed with a mean of $415,000 and standard deviation of $15,000. What percent of the house prices in Springfield will be above $411,200? 60% 30% 70% 40%
In a memo to all those involved in tax preparation, the IRS indicated that the mean amount of refund was $1,600 with a standard deviation of $850. Assume the distribution of the amounts returned follows the normal distribution.a. What percent of the refunds were between $1,600 and $2,000?b. What percent of the refunds were between $900 and $2,000?c. According to the above information, what percent of the refunds were less than $0; that is, the taxpayer owed the IRS.
2. Use the following data obtained from ages of the last six U.S. Presidents at the time of their inauguration to answer the following questions: Ages of Last 6 Presidents at Inauguration George Bush 64 Bill Clinton 46 George W. Bush 54 Barack Obama 47 70 Donald Trump Joe Biden 78 a. [2 pts] Find the mean of the data set. (Round to one decimal place.) b. C. + Find the standard deviation of the data set. (Do not round until the final answer. Round final answer to 1 decimal place.) Explanation is only an explanation of process, not reasoning for this part. What percentage of presidents' ages fall within one standard deviation of the mean? (Round to 1 decimal place.)
1. Suppose that the amount of time takes place the Bureau of Internal Revenue (BIR) to send refunds to taxpayers is normally distributed with a mean of 15 weeks and a standard deviation of 4 weeks. a. What proportion of taxpayers should get a refund within 7 weeks? b. How long will it take before 67% of taxpayers get their refund? 2. The average price of a kilogram of ham is ₱1,200. Assume that the standard deviation is ₱140. It a random sample of 30 one-kilogram packages is selected, find the probability that the mean sample will be less than ₱1,170.
4.
3. The foreign service exam gives passing grade to only the top 10% of those taking the exam. The mean score is 84, with a standard deviation of 8. What should be the minimum passing grade?
. Advertising expenses are a significant component of the cost of goods sold. Listed below is a frequency distribution showing the advertising expenditures for 60 manufacturing companies located in the Southwest. Estimate the mean and the standard deviation of advertising expenses. Advertising Expenditure Number of ($ millions) Companies 25 up to 35 5 35 up to 45 10 45 up to 55 21 55 up to 65 16 65 up to 75 8 Total 60
1. Builtrite Furniture has calculated the average weekly payroll to be $15,000 with a standard deviation of $3,000. Assuming a normal distribution, there is a 4% chance that the weekly payroll will be above what dollar amount? Group of answer choices A. $20,250 B. $21,368 C. $21,983 D. $15,300
3) The distribution of incomes for first year accountants is normally distributed with a mean of $54,000 and a standard deviation of $4,000. What percent of first year accountants earn: a) More than $50,000? b) Between $46,000 and $58,000? c) Less than $46,000? d) Between $58,000 and $62,000
2. If the heights of a male youngsters are normally distributed with a mean of 60 inches and a standard deviation of 10, what percentage of the boys' heights (in inches) would we expect to be a. Between 45 and 75 b. Less than 50 C. 75 or more d. If there are 2,500 male youngsters, how many have height between 65 to 85?