Claim: The mean systolic blood pressure of all healthy adults is less than than 118 mm Hg. Sample data: For 276 healthy adults, the mean systolic blood pressurelevel is 117.74 mm Hg and the standard deviation is 15.86 mm Hg. The null and alternative hypotheses are Ho: = 118 and H: p< 118. Find the value of the teststatistic.The value of the test statistic is(Round to two decimal places as needed.)Tceourcespronsion ToolsHelp me solve thisView an exampleGet more help-Clear allCheck answer

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Answered: Claim: The mean systolic blood pressure…

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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Claim: The mean systolic blood pressure of all healthy adults is less than than 125 mm Hg. Sample data: For 258 healthy adults, the mean systolic blood pressure level is 124.72 mm Hg and the standard deviation is 15.18 mm Hg. The null and alternative hypotheses are Ho: μ = 125 and H₁ : µ< 125. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)
An injection moulding machine produces battery connectors for mobile phones. The process "usually" runs with a mean diameter of 3.8mm and a standard deviation = 2.2 mm. The operator suspects that the process has shifted. A sample of 20 was taken. The 95% CI for u, using the one-sample Z, is 2.736mm, 4.664mm What action should you take? O Let the machine continue to run. Stop the machine. O Wait and re-do the statistical test, the wrong statistical test was used.
Test the claim that the mean GPA of night students is significantly different than 3.3 at the 0.2 significance level. Based on a sample of 50 people, the sample mean GPA was 3.28 with a standard deviation of 0.03The p-value is
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The average cup of coffee is supposed to contain 7.0 ounces. A random sample of ten cups of coffee from this machine show the average content to be 7.3 ounces with a standard deviation of 0.70 ounce. Do you think that the machine has slipped out of adjustment and that the average amount of coffee per cup is different from 7 ounces? Use a 5% level of significance.What are we testing in this problem? A.single proportion b.single mean What is the level of significance? State the null and alternate hypotheses. H0: ? = 7; H1: ? ≠ 7 H0: ? ≤ 7; H1: ? > 7 H0: p ≤ 7; H1: p > 7 H0: p ≥ 7; H1: p < 7 H0: ? ≥ 7; H1: ? < 7 H0: p = 7; H1: p ≠ 7 What sampling distribution will you use? What assumptions are you making? a.The standard normal, since we assume that x has a normal distribution with unknown ?. b.The Student's t, since n is large with unknown ?. C. The standard normal, since we assume that x has a normal distribution with known ?. d.The Student's t, since we assume that…
An airline claims at the Average number of years of experience of its pilots is 18.3 years. In a study 20 pilots the average number of experience is 17.4. The standard deviation of the sample is 3. At a=0.10 is the number of years experience of the pilots really what the airline claimed? State the P- value and the decision. (reject or do not reject)
Pumpkins from a local farmer have a mean weight of 16 pounds with a standard deviation of 2.5 pounds. What is the z-score of an 21 pound pumpkin? z=-2 z=+2 z=-1 z=+1
Claim: The mean systolic blood pressure of all healthy adults is less than than 119 mm Hg. Sample data: For 283 healthy adults, the mean systolic blood pressure level is 118.53 mm Hg and the standard deviation is 15.06 mm Hg. The null and alternative hypotheses are Ho μ=119 and H₁: μ< 119. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)
Previous research has shown that the mean number of ballpoint pens Americans use per year is 4.3 with a standard deviation of 1.17. You believe that amount is too high since computers are used so often this day and age. You randomly select 20 people and find the average to be 3.8 ballpoint pens per year. Assuming normality, is there evidence to show that the mean has decreased? What is the decision for this hypothesis test? Previous research has shown that the mean number of ballpoint pens Americans use per year is 4.3 with a standard deviation of 1.17. You believe that amount is too high since computers are used so often this day and age. You randomly select 20 people and find the average to be 3.8 ballpoint pens per year. Assuming normality, is there evidence to show that the mean has decreased? What is the decision for this hypothesis test? Reject the null because the test statistic is in the critical region and the p-value is less than alpha. Reject the null because the test…
Calculate Z-score and Probabilty We have collected data on the total number of minutes people spent in the local emergency room. The times follow a normal model with a mean of 166.9 min and a standard deviation of 55.4 minutes. Find the following: What percent of ER patients spent between 2.5 and 3.5 hours there?
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Claim: The mean systolic blood pressure of all healthy adults is less than than 121 mm Hg. Sample data: For 272 healthy adults, the mean systolic blood pressure level is 120.59 mm Hg and the standard deviation is 15.61 mm Hg. The null and alternative hypotheses are Ho: I = 121 and H,: I< 121. Question: Find the value of the test statistic.

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