СА9Chi-square test - Goodness-of-fit testSolve the following problem:In the 2010 U.S. Census, the ages of individuals in a small town were found to be thefollowing:<1820%18-3530%23550%in 2010, ages of n=500 individuals from the same small town were sample. Beloware the results:s1812118-3523528891Using alpha=.05, would you conclude that the population distribution of ages haschanged in those 10 years?

Hypothesis : Null hypothesis : H0 : The population distribution of ages has not changed in 10 years.…

Answered: СА9 Chi-square test – Goodness-of-fit…

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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Question 35 ▾ The New York City Marathon is a highly selective race. One way to gain entry into the race is to qualify based on a time from a prior-completed marathon. The NYC Marathon's organizers use this method to limit admission to the top 8% of marathon runners. If the mean completion time of all marathons is 190 minutes with a standard deviation of 20 minutes, what qualifying time should the NYC Marathon organizers set so that only the top 8% of runners will be admitted entry to the NYC Marathon? Round the solution to one decimal place, if necessary. The qualifying time should be set to admitted entry to the NYC Marathon. minutes to ensure that only the top 8% of runners will be
QUESTION 8 Nabisco claims that Chip Ahoy Cookies have an x ̅=28.67 chocolate chips per cookie with a SD=2.67. You randomly select 15 cookies from a new bag and carefully remove all the chocolate chips from each of the 36 cookies. You find the mean of the chocolate chips for the 15 cookies is 24.27 chocolate chips per cookie. Calculate the standard error for the chocolate chips in your experiment. (round to the nearest hundredth).
Question 7 25 for the 95% confidence interval for the mean. when n - tal2 Find Question 8 二+ F3 C F5 F1 F2 F4 F6 团
Question(14): A researcher wanted to know whether children who live in two different neighbourhood (Willowdale and Forresthill) got different amount of excerise. Children were randomly selected from the two neighbourhoods (40 in each). and filled out the daily activity report to measure their excerise. The number of minutes of excerise were tallied and recorded. The The researcher then conducted an independent sample t test using MS-EXCELL. The result are shown in the image below. Inspect the MS- EXCELL output.Did the researcher conduct their t test assuming equal variance.? Write out Step 5 by including both the formal answer and the conclusion. The five steps are: Step 1:State the hypotheses and identify the claim. Step 2: Compute the test value Step 3: Compute the critical value. Step 4:Make the decision (reject or not reject) Step 5:Summaize the results. Note: you only need to submit step 5, and round snswer to decimal places MS-EXCELL output:…
Question 7 Ten students independently performed an experiment to estimate the value on 7. Their results were: (a) (b) (c) 3.12, 3.16, 2.94, 3.33, 3.00, 3.11, 3.50, 2.81, 3.02, 3.10 Given that x² = 97.0011, calculate the sample mean, and sample variance, s². Stating any necessary assumption that you make, calculate a 95% confidence interval for based on these data. Estimate the minimum number of results that would be needed if it is required that the width of the resulting 95% confidence interval should be at most 0.02.
Question 2 A political candidate has asked his/her assistant to conduct a poll to determine the percentage of people in the community that supports him/her. If the candidate wants a 9% margin of error at a 99% confidence level, what size of sample is needed? Be sure to round accordingly. people in the community in order to be within a 9% or The candidate would need to survey 365 margin of error at a 99% confidence level. Submit Question 彩彩彩彩 Previous W search

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