You may need to use the appropriate appendix table or technology to answer this question.A random sample of 85 airline pilots recruited by an airline service had an average yearly income of $99,000 with a standard deviation of $11.000.(a) If we want to determine a 95% confidence interval for the average yearly income of the population, what is the value of e? (Round your answer to three decimalplaces)-1.900x(b) Develop a 95% confidence interval for the average yearly income of all pilots (in dollars). (Round your answers to the nearest dollar)$97.915Xto's 101.005X

Sample size Sample mean Standard deviation

Answered: You may need to use the appropriate…

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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One of the z-score formulas will help on this question. Scores on the SAT test are normally distributed with a mean of 500 and standard deviation of 100 points. Pretend someone scored 400 on the math portion of the SAT test. What would be the z-score cut off for this score? A. 1.0 B. -1.0 C. 0 D. 2.0
Kindly compute the students who got a math score greater than 60
What will be the easiest solution for the following issue?
A queueing system has an arrival rate of 37 visitors per day (standard deviation of 32) and a service rate of 42 visitors per day (standard deviation of 25). (Round your answer to three decimal places.) What is the coefficient of variation of the arrival rate?
question 5
(Continuing from the last question, with the same values) A researcher is interested in testing whether college students send more or fewer texts per day, relative to the general population. The researcher finds out that the population average of texts sent per day is µ = 112, but is unable to find out the population standard deviation. This researcher then recruits 25 college students, and asks about their texting. They report a sample mean of M = 120, with a SS= 1200 In the last question, you computed the estimated standard error (sM) For this question, compute the value of the t-test. t =?
Suppose that a random sample of adult males has a sample mean heart mass of x¯=310.1 grams, with a sample standard deviation of s=6.6 grams. Since adult male heart masses are generally symmetric and bell-shaped, we can apply the Empirical Rule. Between what two masses do approximately 68% of the data occur? Round your answer to the nearest tenth. Approximately $68\%$68% of the men's heart masses are between _____ grams and ______ grams.
The output below is for a t-test for the hypothesis: Individuals living in bad neighborhoods commit more crime than those living in good neighborhoods. The data in the Group Statistics section provides you with the average number of crimes committed by individuals living in good and bad neighborhoods and the standard deviation of this same variable. The findings of significance are located in the Independent Samples Test section. Pay particular attention to the "t" column and the "Sig (2-tailed)"column. The "t" column is the t value that you would have calculated by hand (as we learned in class). The "Sig (2-tailed)"column provides you with the p value (the level of significance of this relationship). In this column, any value below .05 indicates that you would have rejected your null hypothesis. 1. Can someone tell me about the relationship of all these data? I'm trying to determine if my hypothesis, listed below, can be proven or disproven? 2. What is the independent variable and…
To estimate the mean score ?μ of those who took the Medical College Admission Test on your campus, you will obtain the scores of an SRS of students. From published information you know that the scores are approximately Normal with standard deviation about 6.56.5 . You want your sample mean ?¯x¯ to estimate ?μ with an error of no more than 1.41.4 point in either direction. (a) What standard deviation must ?¯x¯ have so that 99.7%99.7% of all samples give an ?¯x¯ within 1.41.4 point of ?μ ? Use the 68–95–99.768–95–99.7 rule. (Enter your answer rounded to four decimal places.) standard deviation of ?¯=x¯= (b) How large an SRS do you need in order to reduce the standard deviation of ?¯x¯ to the value you found? (Enter your answer rounded to the nearest whole number.)
Calcium levels in people are normally distributed with a mean of 9.7 mgdL and a standard deviation of 0.5 mgdL . Individuals with calcium levels in the bottom 10% of the population are considered to have low calcium levels. Find the calcium level that is the borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.
A standardized test is given to a sixth-grade class. Historically the mean score has been 151 with a standard deviation of 21. The superintendent believes that the standard deviation of performance may have recently decreased. She randomly sampled 23 students and found a mean of 161 with a standard deviation of 18.2898. Is there evidence that the standard deviation has decreased at the α=0.05 level? Step 1 of 5 : State of the hypotheses in terms of the standard deviation. Round the standard deviation to four decimal places when necessary Step 2 of 5 : Determine the critical value(s) of the test statistic. If the test is two-tailed, separate the values with a comma. Round your answer to three decimal places. Step 3 of 5 : Determine the value of the test statistic. Round your answer to three decimal places. Step 4 of 5 : Make the decision. Step 5 of 5 : What is the conclusion?
Can you do just questions 4-7 please

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