Hypothesis Testing 3. A UCLA researcher claims that the average life span of mice can be extended by as much as 8months when the calories in their diet are reduced by approximately 40% from the time they areweaned. The restricted diets are enriched to normal levels by vitamins and protein. Suppose thata random sample of 10 mice is fed a normal diet and has an average life span of 32.1 months witha standard deviation of 3.2 months, while a random sample of 15 mice is fed the restricted diet andhas an average life span of 37.6 months with a standard deviation of 2.8 months. Test thehypothesis, at the 0.05 level of significance, that the average life span of mice on this restricted dietis increased by 8 months against the alternative that the increase is less than 8 months. Assumethe distributions of life spans for the regular and restricted diets are approximately normal withequal variances.

Given Data : For Sample 1 x̄1 = 32.1 s1 = 3.2 n1 = 10 For Sample 2…

Answered: A UCLA researcher claims that the…

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 A medical billing specialist claims that the proportion of ER patients who do not have health insurance is different than 0.58. If the medical specialist wants to conduct a hypothesis test, should they use a left-, right, or two-tailed hypothesis test to analyze whether the proportion of ER patients who do not have health insurance is different than 0.58? Select the correct answer below:
Diagnostic tests of medical conditions can have several types of results. The test result can be positive or negative, whether or not a patient has the condition. A positive test (+) indicates that the patient has the condition. A negative test (−) indicates that the patient does not have the condition. Remember, a positive test does not prove the patient has the condition. Additional medical work may be required. Consider a random sample of 200 patients, some of whom have a medical condition and some of whom do not. Results of a new diagnostic test for a condition are shown. Condition Present Condition Absent Row Total Test Result + 110 20 130 Test Result − 21 49 70 Column Total 131 69 200 Assume the sample is representative of the entire population. For a person selected at random, compute the following probabilities. (Enter your answers as fractions.) (a) P(+ | condition present); this is known as the sensitivity of a test. (b) P(− | condition present);…
Diagnostic tests of medical conditions can have several types of results. The test result can be positive or negative, whether or not a patient has the condition. A positive test (+) indicates that the patient has the condition. A negative test (−) indicates that the patient does not have the condition. Remember, a positive test does not prove the patient has the condition. Additional medical work may be required. Consider a random sample of 200 patients, some of whom have a medical condition and some of whom do not. Results of a new diagnostic test for a condition are shown. Condition Present Condition Absent Row Total Test Result + 106 24 130 Test Result − 23 47 70 Column Total 129 71 200 Assume the sample is representative of the entire population. For a person selected at random, compute the following probabilities. (Enter your answers as fractions.) (a) P(+ | condition present); this is known as the sensitivity of a test.(b) P(− | condition present); this is…
HW3
In hypothesis testing, if you find significance, does that mean that your study has meaning? Explain. _______________________________________________
18-34 35-49 50-64 65+ Burger King 127 119 63 163 McDonald's 75 142 82 129 Wendy's 124 156 75 132
Psychological Statistics - Testing Hypothesis about Means - T-test please recheck
Subject: STATISTICS
Hypothesis Test - Population ProportionThe percentage of Texans not covered by health care insurance in 2019 was 15%. Let p denote the proportion of those not covered by health care insurance in Texas. We would like to test the hypotheses H₀ : p ≤ 0.15 vs. Ha : p > 0.15 using a random sample of 100 Texans. The percentage of those who do not have health care insurance in the sample is 20%. What is the value of the test statistic? 0.95 1.4 1.25 2.25
Making a Decision If your claim is in the null hypothesis and you fail to reject the null hypothesis, then your conclusion would be: There is sufficient evidence to warrant rejection of the original claim There is not sufficient sample evidence to support the original claim There is not sufficient evidence to warrant rejection of the original claim The sample data support the original claim
Part A
Computing the Z-test Statistic The State College is evaluating a new English composition course for freshmen. A random sample of n = 25 freshmen is selected from the State College. All 25 students are placed in the new English composition course during their first semester. One year later, a writing sample is obtained for each student and their writing samples are graded using a standardized evaluation technique. The average score for the sample is M= 76. For the general population of the State College, writing scores form a normal distribution with a mean = 70 and a standard deviation = 20. Please calculate the appropriate hypothesis test using all four steps?

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