In 1942, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you on occasion consume, alcoholic beverages?" Of the 1100 adults surveyed, 440 indicatedthat they were total abstainers. In a recent survey, the same question was asked of 1100 adults and 418 indicated that they were total abstainers. Complete parts (a) and (b) below.C"1.M1M2Find the test statistic for this hypothesis test.0.96 (Round to two decimal places as needed.)Determine the P-value for this hypothesis test.(Round to three decimal places as needed.)

Answered: Image /qna-images/answer/d2b3b290-a8dc-4d87-9c50-f3c8f4050948.jpg

Answered: In 1942, an organization surveyed 1100…

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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The standard error for is equal to 0.113. The test statistic for the hypothesis test specified in question 9 is equal to:
There are four questions about this problem in the test shown in random order. Out of 1000 customers in the test data, there are only 100 buyers. A classification model applied to these customers, predicts 200 buyers. If buying is regarded as positive, there are 50 true positives. What is crude accuracy? O a. 10% O b. 25% 15% O d. 20%
Which of the following is not one of the four steps of the hypothesis test? A. State the level of significance, choose a test, and check the conditions for the test B. Make a decision to reject or not reject the null hypothesis C. State the null and alternative hypothesis about the population parameter D. All of the these are steps of the hypothesis test
2
Verdadero=true falso=false
A study conducted among college students looked at the influence of religiosity (high, medium, or low) on anger frequency (never, sometimes, or often) in the last month. The responses of randomly selected college students at a large school in the United States are shown in the following table. Anger Frequency Never Sometimes Often High 214 What is the correct conclusion for this hypothesis test? 145 29 Medium 129 61 18 Low 60 55 27 You want to determine if anger frequency and religiosity are independent. Use a level of significance of a = 0.10. O As the P-value is less than a, we reject the null hypothesis. Thus, there is sufficient evidence to conclude that anger frequency and religiosity are not independent. O As the P-value is less than a, we reject the null hypothesis. Thus, there is insufficient evidence to conclude that anger frequency and religiosity are not independent. O As the P-value is less than a, we fail to reject the null hypothesis. Thus, there is sufficient evidence to…
Home Prices in Pennsylvania A real estate agentclaims that the average price of a home sold in BeaverCounty, Pennsylvania, is $60,000. A random sample of36 homes sold in the county is selected, and the prices indollars are shown. Is there enough evidence to reject theagent’s claim at a 0.05? Assume s $76,025.9,500 54,000 99,000 94,000 80,00029,000 121,500 184,750 15,000 164,4506,000 13,000 188,400 121,000 308,00042,000 7,500 32,900 126,900 25,22595,000 92,000 38,000 60,000 211,00015,000 28,000 53,500 27,000 21,00076,000 85,000 25,225 40,000 97,000284,000
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A group of 500 people were asked to cast votes regarding a particular political issue. The following frequencies occurred. Favor Undecided Oppose Totals Female 180 80 40 300 Male 150 20 30 200 Totals 330 100 70 500 1. Determine if voters’ opinions are independent or dependent of gender. Set up hypotheses; perform a test for independence; analyze all relevant aspects of your conclusion.
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A drug company claims that an allergy medication causes headaches in 5% of those who take it. A medical researcher believes that more than 5% of those who take the drug actually get headaches. What kind of hypotheisis test is this? O2 population proportions O2 population means O1 population proportion O1 population mean Which hypotheses do we want to test? O Họ: p = 0.05 HA: p = 0.05 O Ho: p 0.05 HA p = 0.05 O Họ: p = 0.05 HA: p 0.05 Check Answer
Abnormalities In the 1980s it was generally believedthat congenital abnormalities affected about 5% of thenation’s children. Some people believe that the increasein the number of chemicals in the environment has ledto an increase in the incidence of abnormalities. A recentstudy examined 384 children and found that 46 of themshowed signs of an abnormality. Is this strong evidencethat the risk has increased?a) Write appropriate hypotheses.b) Check the necessary assumptions.c) Perform the mechanics of the test. What is theP-value?d) Explain carefully what the P-value means in context.e) What’s your conclusion?f) Do environmental chemicals cause congenitalabnormalities?

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