### Question 1A medical research team created a special treatment program to reduce systolic blood pressure levels of patients. If the treatment program is effective, the average blood pressure level of these patients should be below 120. They are doing a statistical hypothesis test to check the effectiveness of their treatment program. What would be the null hypothesis of their hypothesis test for mean blood pressure? The population mean blood pressure is denoted by μ.### Options:- a. μ ≠ 120- b. μ > 120- c. μ = 120- d. μ < 120#### Answer Submission:Click "Save and Submit" to save and submit your answer. Click "Save All Answers" to save all answers.---[Explanation: In hypothesis testing, the null hypothesis (H₀) typically represents the status quo or a position of no difference or no effect. Here the null hypothesis would be that the special treatment program does not affect the patients' average systolic blood pressure, keeping it at 120. Hence, the correct null hypothesis would be denoted as μ = 120 (Option c).]

The hypothesized mean is μ0=120

Answered: QUESTION 1 1) A medical research team…

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 20 An environmental researcher wants to know whether the mean amount of sulfur dioxide in the air in UAE cities is less than 1.22 parts per billion (ppb). She tested the hypotheses Ho: 21.22 versus Ha: < 1.22 using a significance level a = 0.05. The p-value of the test is 0.045. If the true value of µ is 1.23, the conclusion results in Correct decision. Type I error. Both Type I and Type II errors. Type II error.
Question 2: In order to determine the miles per gallon rating for a new midsize minivan, an automaker randomly selected a sample of 50 vehicles. The showed = 31.56 mpg with s=.798 mpg. At 95% confidence, what is the minimum mpg rating you could give the car?
Question 1. Greater than or Less than. Question 2. IS or IS NOT.
QUESTION 6 In a recent speech to students, the Dean of the College of Business claims that the average grade of students in the college is no longer 75. To conduct a test of the dean's claim, a randomly selected sample of 64 students revealed an average grade of 76 with a standard deviation of 5. Is there evidence that the average grade is no longer 75? Use a = 0.05. Ho: p= 75 vs H₁: #75. t-stat 1.6. p-value = 0.115. Do not reject Ho and there is not enough evidence to support the dean's claim. Ho: μ = 75 vs H₁: #75. Z-stat 1.6. p-value = 0.11. Do not reject Ho and thers is not enough evidence to support the dean's claim. ⒸHo: p = 75 vs H₁: # 75. z-stat 1.6. p-value = 0.11. Do not reject Ho and there is enough evidence to support the dean's claim. Ho: p=75 vs H₁: #75 t-stat= 1.6. p-value = 0.115. Do not reject Ho and thers is enough evidence to support the dean's claim.
Question 8 Dr. Jameson wanted to know if IQ scores differed between male and female participants in his study. He gave 28 participants an IQ test and then compared IQ scores for gender differences. He hypothesized that there would be a statistically significant gender difference in IQ scores. Contrary to Dr. Jameson's hypothesis, there were no differences in IQ scores between men and women in his study. Based on the information provided, does this study meet the assumption of normality? Why or why not? We do not know whether it is normally distributed because we do not have information on the population. Yes; it is normally distributed because the sample size is large. No; it is not normally distributed because the small sample size is small. We do not know whether it is normally distributed and the sample size is not at least 30 participants.
Question #3 Samples of body temperatures were collected for a group of women and a group of men. The summary statistics are given below: Women:n1 = 15 sample mean = 98.38 ̊F s1 = 0.45 ̊F Men:n2= 91 sample mean= 98.17 ̊F s2 = 0.65 ̊F 1. Use a 0.01 significance level to test the claim that women and men have different mean body temperatures using the p value method. Show all the steps of your hypothesis test including the p value: initial conclusion: a final conclusion about the original claim:
Question 7: Weight loss: In a study to determine whether counseling could help people lose weight, a sample of people experienced a group-based behavioral intervention, which involved weekly meetings with a trained interventionist for a period of six months. The following data are the numbers of pounds lost for 14 people. Assume the population is approximately normal. Perform a hypothesis test to determine whether the mean weight loss is greater than 13 pounds. Use the a=0.05 level of significance and the P-value method with the TI-84 Plus calculator. 21.2 27.5 6.5 22.8 20 11.5 16.2 19.7 36.3 32.5 11.1 34.8 22.4 17.9 Part 1: (a) State the appropriate null and alternate hypotheses. H0: (BLANK) H1:(BLANK) This hypothesis test is a (BLANK) tests. Answer Choice: Left-Tailed Right-Tailed Two-Tailed Part 2: (b) Compute the value of the test statistic. Round the answer to at least three decimal places. t = (BLANK) Part 3: (c) Compute the P-value. Round the answer to at…
4. Answer question 2
Question 7: give the test statistic

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