Researchers from a certain country were interested in how characteristics of the spleen of residents in their tropicalenvironment compare to those found elsewhere in the world. The researchers randomly sampled 93 males and 107females in their country. The mean and standard deviation of the spleen lengths for the males were 10.8 cm and 0.9cm, respectively, and those for the females were 10.2 cm and 0.7 cm, respectively. At the 5% significance level, dothe data provide sufficient evidence to conclude that a difference exists in the mean spleen lengths of males andfemales in the country?Click here to view page 1 of the table of critical values of t.Click here to view page 2 of the table of critical values of t.O E. Ho: H1 H₂Hai Hg = H2Compute the test statistic.=(Round to two decimal places as needed.)Determine the critical value(s).t=OF. Ho: H1 H₂Ha: H1 H₂0(Round to three decimal places as needed. Use a comma to separate answers as needed.)What is the conclusion of the hypothesis test?Since the test statisticin the rejection region,Ho. Conclude that the datasufficient evidence that a difference exists in the mean spleen lengths of males and females in the country.

That is, there is no evidence to conclude that there is a difference exists in the mean spleen…

Answered: Researchers from a certain country were…

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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Fuel efficiency of Prius: Fueleconomy.gov, the official US government source for fuel economy information, allows users to share gas mileage information on their vehicles. The histogram below shows the distribution of gas mileage in miles per gallon (MPG) from 14 users who drive a 2012 Toyota Prius. The sample mean is 53.3 MPG and the standard deviation is 5.2 MPG. Note that these data are user estimates and since the source data cannot be verified, the accuracy of these estimates are not guaranteed. (a) The EPA claims that a 2012 Prius gets 50 MPG (city and highway mileage combined). Do these data provide strong evidence against this estimate for drivers who participate on fueleconomy.gov? The test statistic is: __________________(please round to two decimal places)The p-value:___________________________ for this hypothesis test is: (please round to four decimal places)(c) Please comment on the primary thing that is wrong about the following statement: There is sufficient evidence…
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The college board reports that in a recent year, the mean mathematics SAT score was 514, and the standard deviation was 118. A sample of 65 scores is chosen. Find the 98th percentile of the sample mean.
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A credit score is used by credit agencies (such as mortgage companies and banks) to assess the creditworthiness of individuals. Values range from 300 to 850, with a credit score over 700 considered to be a quality credit risk. According to a survey, the mean credit score is 709.6. A credit analyst wondered whether high-income individuals (incomes in excess of $100,000 per year) had higher credit scores. He obtained a random sample of 39 high-income individuals and found the sample mean credit score to be 724.1 with a standard deviation of 81.5. Conduct the appropriate test to determine if high-income individuals have higher credit scores at the g = 0.05 level of significance. State the null and alternative hypotheses. Ho: H = 709.6 H1: µ > 709.6 (Type integers or decimals. Do not round.) Identify the t-statistic. tn = (Round to two decimal places as needed.)

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