Formulate the Null hypothesis(Ho) and Alternative hypothesis (Ha) from the given problem below, and identify if the hypothesis test is directional od non-directional. 2.) A researcher wants to determine if there is a significant difference betweet the performance of the faculty from the different colleges.

Q: 4. Facebook wants to maximize the visibility of businesses on who advertise on their platform. This…

A: For new design: The sample size, n1=35; The sample mean, x¯1=15; The sample standard deviation,…

Q: Are freshmen psychology majors just as likely to change their major before they graduate compared to…

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Q: The researcher aims to reject the null hypothesis (Ho) and accept the alternate (H1). In analogy,…

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Q: Ms. Shen thought that students would be more likely to remember their review if she called their…

A: When to use: T-test: A t-test can only be used when comparing the means of two groups. t-tests…

Q: our company markets a computerized medical diagnostic program used to evaluate thousands of people.…

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Q: a. Choose the appropriate null hypothesis for this test. O Ho: The individual has been caught…

A: The observed frequency is given and the IRS currently uses Benford's Law to detect fraudulent tax…

Q: The operations manager of a company that manufactures tires wants to determine whether there are any…

A: Given that                    Is the shift when the tire was produced related to its condition?…

Q: In soccer, serious fouls result in a penalty kick with one kicker and one defending goalkeeper. The…

A: The hypothesis is, Null hypothesis: H0: Jump direction is independent of kick direction. Alternative…

Q: In soccer, serious fouls result in a penalty kick with one kicker and one defending goalkeeper. The…

A: There are 2 categorical variables which are goalkeeper jump and direction of the kick. Direction of…

Q: In soccer, serious fouls result in a penalty kick with one kicker and one defending goalkeeper. The…

A: "Since you have posted a question with multiple subparts, we will solve first three subparts for…

Q: Dr Johnson is interested in testing the hypothesis that people talk more when they are nervous. She…

A: Thank you for posting your question, since you have asked multiple questions as per the guidlines I…

Q: 6) Goofy is running for Mayor of Duckburg.  He asks  1250 ducks in Duckburg if they will vote for…

A: 6) The given sample of 1250 ducks in which 276 said that they will vote for him and a sample sample…

Q: A company manager wants to compare the satisfaction levels of his customers from two stores…

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Q: A mayor is concerned about the percentage of city residents who express disapproval of his job…

A: The mayor pays the newspaper and expects that his disapproval rating will be less than 21% Here, p =…

Q: Write the research and null hypothesis for the following researches: a. To test the differentiated…

A: Null and Alternative Hypothesis are the conditions which we test for in our hypothesis testing. In…

Q: n​ soccer, serious fouls result in a penalty kick with one kicker and one defending goalkeeper. The…

A: The data shows the penalty kick data.

Q: 7. Refer to the Bayer Aspirin problem: a) Suppose the hypothesis-testing problem was changed to a…

A: According to the given information  Null hypothesis The hypothesis that there is no significant…

Q: Experts in coffee-making were polled to determine their preferences for the following three types of…

A: The categorical variable is Coffee type. It has 3 categories which are Kona Gold, Jamaica Blue and…

Q: If a researcher is wrong in his decision and he rejects the null when the null is true, what type of…

A: Type I error: The type I error is the rejection of the null hypothesis when it is actually true.…

Q: A researcher was interested in the relationship between eye color and hair color in a population of…

A: the procedure to calculate the ANOVA test in excelfirst open excel then after selecting the data…

Q: Potential buyers for a new car were randomly divided into two groups. One group was shown the "A"…

A: Here, the potential buyers for a new car were divided into two groups. The researcher wants to…

Q: 1. Residents in a barangay A and B responded to the same question regarding the controversial issue…

A: Disclaimer :  “Since you have posted a question with multiple sub-parts, we will solve first three…

Q: 2. A researcher wants to know if there is a link between the number of hours spent in playing online…

A: Given that  A researcher wants to know if there is a link between the number of hours spent in…

Q: Are freshmen psychology majors just as likely to change their major before they graduate compared to…

A: From the given information, it is observed that the test is about two population proportions. Thus,…

Q: A store owner wanted to determine if the average purchase with a discount coupon is greater than 60…

A: The store owner wanted to check whether the average purchase with a discount coupon is greater than…

Q: If you use a 0.05 level of significance in a two-tail hypothesis test, what decision will you make…

A: Solution: 4. From the given information, ZSTAT = –0.45 and the test is two-tailed.

Q: A company that owns department stores advertised for one month on television and radio and in…

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Q: In a study in which the null hypothesis has been rejected, we should be aware of the possibility of?…

A: In a study in which the null hypothesis has been rejected, we should be aware of the possibility of-…

Q: Your company markets a computerized medical diagnostic program used to evaluate thousands of people.…

A: Solution: 1. State the hypotheses. Null hypothesis: H0: The patient is healthy. Alternative…

Q: 4. For each the following scenarios in (a) – (e), specify the correct hypothesis test you should use…

A: When we want to claim something we go for hypothesis testing. Here we do a decision about the…

Q: 1-You will be conducting a study focusing on the relationship between student studying hours and…

A: Solution: To test the relationship between any two variables, a correlation test is used. The…

Q: In soccer, serious fouls result in a penalty kick with one kicker and one defending goalkeeper. The…

A: Solution

Q: A teacher selects a random sample of 56 students from her large high school. For each student, she…

A: We want to tell you hypothesis

Q: Find the P-value of z-score (3.55) if doing a two-tail hypothesis test.

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Q: 2. A researcher asks if people score higher or lower on a questionnaire measuring their emotional…

A: Sample size: n=8 Sample data: Low x1 High x2 14 18 13 12 17 20 15 19 18 22 17 19…

Q: A teacher is comparing the mena study time of his freshmen and senior students. He believes that his…

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Q: A researcher hypothesizes that opera music will have an effect on test scores (but she is unsure…

A: Population mean μ = 70Population standard deviation σ = 10Sample size n = 30Sample mean x¯ =…

Q: 7. When designing an hypothesis test, one of the first decisions that needs to be made is which…

A: Type 1 error - probability of rejecting a null hypothesis when it is true Type 2 error - probability…

Q: For each the following scenarios in (a) – (e), specify the correct hypothesis test you should use to…

A: It is a hypothesis testing problem.

Q: Are freshmen psychology majors more likely to change their major before they graduate compared to…

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Q: The alternative hypothesis is presumed to be true unless data gives strong evidence against it. True…

A: Null and alternative hypotheses: Null hypothesis is a nullified statement about population parameter…

Q: A group of psychologists wants to see if a 10-week self defense training program will increase the…

A: Given Information:  A group of psychologists wants to see if a 10-week self defense training program…

Q: A golf instructor claims that more than 70% of his students have improved their driving distance by…

A: Given: population proportion: p = 0.70 n = 180 x = 138 Claim : A golf instructor claims that more…