A random sample of 37 MBAs working in New York revealed that their mean annual salarywas $132,000. Suppose that the population standard deviation o is $31,000 but that thepopulation mean μ is unknown. What is the point estimate (i.e. the "best guess") of the meansalary μ of all MBAs in this city?O $99,000O $132,000O $116,000O $31,000

Givensample size(n)=37Mean(x)=132000standard devaition(σ)=31000

Answered: A random sample of 37 MBAs working in…

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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Español Ten percent of the world's population is left-handed. A researcher claims that left-handed individuals are more creative than those who aren't left-handed. In order to support his claim, he takes a sample of 900 artists and finds that 11 % of them are left-handed. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of p, where p is the proportion of left-handed individuals in a random sample of 圖 900. 0.10 (b) Find the standard deviation of p. 0.01 Aa (c) Compute an approximation for P(p<0.11 ), which is the probability that there will be 11 % or fewer left-handed people in a random sample of 900. Round your answer to four decimal places. AM svg Explanation Check © 2022 McGraw Hill LLC. AlI Rights Reserved. Terms of Use | Privacy Center| Accessibility **** . ... MacBook Air DII 80 F9 F10 F11 F4 FS F6 F1 F2 F3 @ 23 $ & 4 7 Q E R T Y P
A researcher thinks that how often someone reports visiting a science museum in a year is different for people with children and people with at least one child. They get the following output: Group Statistics Std. Std. Error Respondent's children Visits to No children N 797 Mean Deviation Mean 0.27 1.077 0.038 science museum 1 or more children 2062 1.65 4.997 0.969 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means F Visits to Equal 4.492 Sig. 0.034 -1.231 t df 2857 Sig. (2-tailed) 0.218 science museum variances assumed Equal -1.979 2067.380 0.048 variances not assumed 1. What is the research hypothesis? Is this one-tailed or two-tailed? (note how the problem is worded to indicate if it is one or two tailed)
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Suppose a population is known to be normally distributed with a mean, μ, equal to 144 and a standard deviation, σ, equal to 27. Approximately what percent of the population would be between 144 and 198?
1. The amount of time a Tech student spends on Instagram has an approximately exponential distribution with mean 60 minutes. a. What is the probability a randomly selected student spends less than 45 on Instagram? b. Illustrate your answer from a. using the pdf c. Find the cumulative distribution function for the time students spend on Instagram. d. What is the probability a randomly selected student is on Instagram for a time within 2 standard deviation of the mean?
A team of ten (10) construction workers who are working on a project are classified according to the skill levels, Classes A to D. The table below shows the number of workers in each of the four (4) classes and their respective hourly pay-rate. Pay-rate (Rands/hour) Number of workers Class A 80 Class B 60 Class C 55 Class D 50 4. Calculate the mean hourly pay-rate for the 10 workers. A. R24.50/hour B. R57/hour C. R57.50/hour D. R61.75/hour
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Consider the data from the Anthropology 105 class. The mean for women is 64.33 in and the standard deviation is 2.64 in. The average height of men in the US is approximately 5ft 10in. What proportion of women represented here are shorter than the average man?
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Now suppose that the true mean exposure time is different from 8h/day, yet the sample mean falls in the acceptance region. In this case we would fail to reject H0 when it is false. This type of wrong conclusion is called a A. type II error B. type I error C. no error D. statistically significant

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