9. The monthly income of 5,000 workers at the Microsoft plant are distributed normally. Suppose themean monthly income is $1,250 and the standard deviation is $250.l-ers eorn less +1 m-.montho.d) 97.7% of workers earn less than how muchpermonth?neethelp with

P(X<a)=0.977 a=? Mean=μ=1250, standard deviations σ=250

Answered: 9. The monthly income of 5,000 workers…

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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All 6 members of a family work. Their hourly wages (in dollars) are the following. 37, 28, 16, 24, 10, 11 Send data to calculator Send data to Excel Assuming that these wages constitute an entire population, find the standard deviation of the population. Round your answer to two decimal places. (If necessary, consult a list of formulas.) 0
Suppose that time required to compete a 1040R tax form is normally distributed with a mean of 110 minutes and a standard deviation of 15 minutes. What proportion of the 1040R tax form will be completed in less than 121 minutes. Round your answer to at least 4 decimal places.
Please answer ASAP
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Suppose the average monthly welfare (TANF) payment is $376 and the standard deviation is $40. Using Chebyshev’s Theorem, determine the upper and lower bounds of the average welfare payment, such that at least 94% of the population is included. How would your answer to (a) change if you knew the distribution was normal? Explain.
The average American gets a haircut every 34 days. Is the average smaller for college students? The data below shows the results of a survey of 15 college students asking them how many days elapse between haircuts. Assume that the distribution of the population is normal. 35, 23, 32, 38, 31, 39, 35, 25, 30, 36, 40, 27, 23, 32, 25 What can be concluded at the the a = 0.10 level of significance level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ?v Select an answerv Hi: ?vSelect an answerv c. The test statistic ?v = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 3 decimal places.) e. The p-value is 2v a f. Based on this, we should Select an answerv the null hypothesis. g. Thus, the final conclusion is that.. O The data suggest the population mean is not significantly lower than 34 at a = 0.10, so there M 24 3. 4. 5 6. 7 EU
The graph illustrates the distribution of test scores taken by College Aigebra students. The maximum possible score on the test was 140, while the mean score was 76 and the standard deviation was 14. 34 48 62 76 90 104 Distribution of Test Scores What is the approximate percentage of students who scored between 76 and 90 on the test? What is the approximate percentage of students who scored higher than 104 on the test? What is the appraximate percentage of students who scored higher than 118 on the test? What is the approximate percentage of students who scored between 48 and 104 on the test?
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Suppose that the mean systolic blood pressure for women over age seventy is 131 mmHg (millimeters of mercury), with a standard deviation of 9 mmHg. Suppose that the blood pressures are normally distributed. Complete the following statements. (a) Approximately? mmHg and 140 mmHg. of women over seventy have blood pressures between 122 (b) Approximately 95% of women over seventy have blood pressures between mmHg and mmHg.
There are two rows
31. A class of 20 students took a test. The standard deviation of the test scores is 0. Which of the following statements must be true about the test scores? A. All of the test scores are zero. B. All of the test scores are positive. C. Half of the test scores are positive and half of the test scores are negative. D. All of the test scores are the same.

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9. The monthly income of 5,000 workers at the Microsoft plant are distributed normally. Suppose the mean monthly income is $1,250 and the standard deviation is $250. . ... 1-ers aorn less +1 - month?. A... d) 97.7% of workers earn less than how much per month? neethelp wit