A teacher is comparing the mean study time of his freshmen and senior students. He believes that his senior students spend more time studying per week than his freshmen students and decides to perform a hypothesis test  on this belief. a. suppose the decision of the hypothesis test is to reject the null hypothesis. If, in reality, freshmen study for a mean of 10 hours per wekk and seniors study for a mena of 15 hours per week, was an arror made? If so, what type?  b. Suppose the decision of the hypothesis test is to fail to reject the null hypothesis. If, in reality, freshmen study for a mean of 15 hours per week and seniors study for a mean of 15 hours per week, was an error made? if so, what type?

Q: 3. Sommer (1999) investigated student satisfaction with distance learning. One grot of students took…

A: Let Sample 1 : Internet Sample 2 : Classroom First we need to know whether the population variances…

Q: Suppose that in a random selection of 100 colored​ candies, 26​% of them are blue. The candy company…

A: Given information: Sample size (n) =100 Sample proportion = 0.26 Significance level = 0.05 Let…

Q: Clark Barr makes a claim that 15% of all students who take statistics drop out. Rosetta Stone…

A: 1) Hypotheses: Let p be the proportion of all students who take statistics drop out. The aim is to…

Q: 4. A researcher is interested in whether daily positive affirmations can lead to positive academic…

A: In testing of hypothesis, there are two hypotheses - null and alternative. The null hypothesis must…

Q: Suppose that in a random selection of 100 colored candies, 29% of them are blue. The candy company…

A: From the provided information,

Q: In a study focusing on student's achievement. 100 students were classified as low, average, or high…

A: a.   In this case. 100 students were classified as low, average, or high achieving, based on the…

Q: Suppose that in a random selection of 100 colored​ candies, 30​% of them are blue. The candy company…

A: Given information n = 100 coloured candies p-hat = 0.30 p = 25% Claim :- Percentage of blue candies…

Q: Suppose that in a random selection of 100 colored​ candies, 29​% of them are blue. The candy company…

A: B.H0​:p=0.2     H1​:p≠0.2

Q: Most pregnancies are full term, but some are preterm (less than 37 weeks). Of those that are…

A: From given data we have : Observed Frequencies   under 20 B1 20 to 29 B2 30 to 39 B3 40 or Over…

Q: Is there an association between teenagers with Back pain and Gender? The study was also conducted…

A: It is needed to test, whether there is an association between teenagers with Back pain and Gender.

Q: Suppose that in a random selection of 100colored​ candies, 29​% of them are blue. The candy company…

A: Claim: percentage of blue candies is equal to 26​% Null Hypothesis: H0:p=0.26 The percentage of blue…

Q: Suppose that in a random selection of 100 colored candies, 27% of them are blue. The candy company…

A: From the provided information,

Q: Identify the null and alternative hypotheses for this test. Choose the correct answer below. OA. Ho:…

A: Let p be the population proportion  n be the sample size  p^ be the sample proportion

Q: A school psychologist designed a study to investigate the effectiveness of three study programs. A…

A: Given information: The data of n = 30 students is provided as: Program A: 12, 10, 15, 9, 8, 12, 6,…

Q: The following hypothesis-testing situation is given:   H0: π ≤ .50 and H1: π > .50. The…

A: The given hypothesis is H0:π≤0.50 and H1:π>0.50. The significance level is 0.10 and the sample…

Q: In performing a hypothesis T-test, the p-value was 0.00046 and the significance level was 5%.  What…

A: Given,   P-value: 0.00046 Level of significance = 0.05   The objective is to find the conclusion.

Q: . Use a 0.05 significance level to test the claim that among​ couples, males speak fewer words in a…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: An antifungal medication was applied to the skin of 8 adult subjects. One hour later the amount of…

A: It is given an antifungal medication was applied to the skin of 8 adult subjects. One hour later the…

Q: In a study conducted to investigate browsing activity by shoppers, each shopper was initially…

A:

Q: In Bloomington, they randomly sampled 280 female voters, and 230 male voters. They collected data on…

A: Hypothesis:               Ho: Gender and issue attitudes are independent.…

Q: Since an instant replay system for tennis was introduced at a major tournament, men challenged 1432…

A: Followings are the Explanation of the question  Use the Two Sample Z proportion test and its…

Q: 190 AGA 14. The mean age of bus drivers in Chicago is 48.7 years. a. If a hypothesis test is…

A: The mean age of bus drivers is 48.7 years.

Q: Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A.…

A:

Q: If the significance level in a hypothesis test is 5%, the null hypothesis would be rejected if the…

A: The probability of obtaining a statistic or test statistic value at least as extreme as the observed…

Q: In 2002, the General Social Survey conducted by StatsSA, participants was asked the following…

A: Test is that whether there is a relationship between death penalty and marjuana beliefs.

Q: Samples of Republicans, Democrats, and independents, have been tested for their level of support for…

A: We have given that samples of Republicans, Democrats, and Independents have been tested for their…

Q: A psychologist would like to examine the effects of different testing methods on the final…

A: Given that, G=36, ∑ X2=164 Grand mean=36/12=3 SS Quizzes=10 ; SS Exams=10 ; SS Final=4 SS…

Q: In a recent court case it was found that during a period of 11 years 857 people were selected for…

A: Given: Sample size (n) = 857 Sample proportion (p̂) = 0.38  Population proportion (p) = 0.78…

Q: Which level of significance makes it easier to reject the null hypothesis, and why does the level of…

A: We have given that the statement about to the significance level that makes it easier to reject the…

Q: If the level of significance for a test for independency was 5% and the p-value was 0.03, what would…

A: Given,   P-value = 0.03 Level of significance = 0.05   The objective is to find the conclusion.

Q: Suppose that in a random selection of 100 colored​ candies, 25​% of them are blue. The candy company…

A: Given Suppose that in a random selection of 100 colored​ candies, 25​% of them are blue. The candy…

Q: The American Library Association claims that at most 67% of library patrons actually borrow books.…

A:

Q: 3. In a study done in Michigan, it was determined 38 (out of 62) poor children who attended…

A: given that

Q: The Department of Health and Welfare in Pulaski County is reviewing charges for a common surgical…

A: a. Null Hypothesis: H0: There is no difference in the means among the three hospitals. Alternative…

Q: In an experiment to study the relationship between hypertension (high blood pressure) and snoking…

A: a) This is a purposive study as Researchers use purposive sampling when they want to access a…

Q: actually 0.25 (we normally wouldn’t know this, but suppose hypothetically someone was able to know…

A: The total number of exposed and non-exposed  in the source population   Cases Controls Exposed…

Q: Explain the difference between an independent and dependent sample. Choose the correct answer below.…

A:

Q: Q4. Which of these statements are correct for a hypothesis test: I. The Significance Level is the…

A:

Q: Samples of Republicans, Democrats, and Independents have been tested for their level of support for…

A: Given information- We have given that samples of Republicans, Democrats, and Independents have been…

Q: Suppose that a hypothesis test is performed at a small significance level. State the appropriate…

A: Decision criterion:If the p-value of the test is less than or equal to the level of significance,…

Q: A genetic experiment involving peas yielded one sample of offspring consisting of 442 green peas and…

A: Given X=149 n=442+149=591