average, college freshmen spend 7.5 hours a week  going to parties. One administrator does not believe that these figures apply at her  college, which has nearly 3,000 freshmen. She takes a simple random sample of 100  freshmen and interviews them. On average, they report 6.6 hours a week going to

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A:

Q: Imagine a researcher wants to determine whether parents differ from each other in their fondness for…

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Q: Past studies have indicated that the percentage of smokers is estimated to be about 33%. Given the…

A:

Q: Professors collected data consisting of eye color and gender of statistics students. Among 950 male​…

A: Given that, For males:  X1= 372 and sample size n1= 950  p1^ = X1/n1 = 372/950 =0.3916 For females:…

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Q: Could two samples have the same range but different means? Explain.

A: Yes, Two samples have the same range but different means.

Q: Construct a 90% confidence interval for the true difference between the mean amounts of time spent…

A:

Q: Suppose when a data set with 32 values is treated as a "population", the value of the (population)…

A: Given that  Population Variance = 145.2  n = 32

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A: Given that,  x = 23, n = 38 The sample proportion of people prefer biking is, Null and alternative…

Q: When we are comparing two sample means that are not the same group of individuals, what kind of test…

A: Given that  When we are comparing two sample means that are not the same group of individuals

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Q: Researchers examined the influence of a television program on children's aggressiveness. The number…

A: Since we only answer up to 3 sub-parts, I'll answer the 1st 3 sub-parts. Please resubmit the…

Q: State the null and alternative hypothesis as an expression

A: Given that x1=12.5 x2=13.9 s1=3.9 s2=5.2 n1=14 n2=17

Q: Create two scenarios when you would use an independent samples t-test. Make sure to clearly…

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Q: Three hundred participants were asked to think of colors and write them down. After a 15 minute…

A: The hypothesis test is used for testing a claim which helps in making important business decisions.

Q: An adventure company runs two obstacle courses, Fundash and Coolsprint. The designer of the courses…

A: Since you have posted a question with multiple subparts, we will solve the first 3 sub-parts for…

Q: The time married men with children spend on child care averages  6.9 hours per week. You belong to a…

A: From the provided information,The time married men with children spend on child care averages  6.9…

Q: An adventure company runs two obstacle courses, Fundash and Coolsprint. The designer of the courses…

A: Given:population 1 = Fundash population 2 = Coolsprint sample size :n1 = 280n2 = 225 sample mean:x̄1…

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Q: A software company is interested in improving customer satisfaction rate from the 80% currently…

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Q: Is the proportion of twin births among teenage mothers different from the overall figure?

A: It is given that Sample size n = 469 Number of twin births, X = 7 Level of significance = 10% = 0.10

Q: Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 52% of the…

A: Givensample size(n)=100p^=0.47

Q: Pick a sample problem where despite correlation, causation cannot be reasonable argument.

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Q: If a researcher failed to use a random sample, how would this affect the research conclusion?   If…

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A: Let a data set have a high sample variance. The histogram is used to visualize a grouped frequency…

Q: A researcher conducts a study to investigate whether the obesity rate rural communities differ from…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: when you have means from two different samples, it is best to conduct a what test?

A: When there is mean from two different samples, two types of test can be conduced:

Q: Placebo Drug A Drug B |70 |60 10 30 50 15 50 30 10 50 30 18 40 40 19 Use alpha of .05.

A: Here, there are more than two groups to compare the means, the one-way ANOVA is the appropriate…

Q: A scientist studied the spread of AIDS and concluded that 24% of people contracted the disease.…

A: A scientist concluded in a test that 24% of people contracted in the disease. The scientist was…