The monthly incomes for 12 randomly selected people, each with a bachelor's degreein economics, are shown on the right. Complete parts (a) through (c) below.Assume the population is normally distributed.(a) Find the sample mean.x = 4263.1 (Round to one decimal place as needed.)(b) Find the sample standard deviation.S = 260.1 (Round to one decimal place as needed.)(c) Construct a 95% confidence interval for the population mean u.DA 95% confidence interval for the population mean is(Round to one decimal place as needed.)nis Get more help -Q SearchDTipe==16DO4450 424455.184283.233946.934596.824151.164527.884023.62Clear all44366.363727.124407.034221.59Check answer4) O4:37/16/

It is given that the monthly incomes of 12 randomly selected people, each with a bachelor’s degree…

Answered: (a) Find the sample mean. x = 4263.1…

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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PLEASE ANSWER THE QUESTION IN THE PHOTO. TY!
See picture for questions A and B
We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers believe the population standard deviation is approximately σ=26.1. We would like to be 99% confident that the estimate is within 3 of the true population mean. How large of a sample size is required?
There are several sections of Statistics; some in the morning and some in the afternoon. We randomly select n1 40 from the morning section and 44 from the afternoon section. The averages n2 of their scores are X1 76.3 for the morning section and X, = 71.9 for the afternoon section. The known standard deviations of their scores are 01 12.05 for the morning section and 02 13.06 for the afternoon section. Test the claim that the average for all students in the morning and afternoon section is the same. Use a a = 0.05 significance level. a. What is the negative critical region? Give your answer to two decimal places. z c. What is the test statistic? Give your answer to two decimal places. z = d. Do we reject or fail to reject the null hypothesis? OReject Ho OFail to reject Họ
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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…
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