A store manager wishes to see if the employees of the store had a preference in the types of music played on the speaker system. A survey of 60 employees stated the type of music they preferred. The data are shown. At the 0.05 level of significance, is there a preference? Type        Classical    Country    Pop    Rock number     9                18            22       11 What is the appropriate alternate hypothesis for this problem? What is the critical value? What is the test statistic for this problem? Make the decision

Q: Compute the value of the test statistic. (to 2 decimals)  What is the p-value?

A: The test statistic is, t=x¯1-x¯2s12n1+s22n2=6.82-6.250.64216+0.75210=0.570.28609439=1.9923≈1.99…

Q: Candidate T wants to determine if there is a difference in his popularity between men and women.  To…

A:

Q: A community is considering raising funds to pay for improvements to the community swimming pool. To…

A: We need to identify suitable option regarding study

Q: Claim: Fewer than 93 ​% of adults have a cell phone. In a reputable poll of 1162   ​adults, 85 ​%…

A: Given information- Population proportion, p = 0.93 Sample size, n = 1162 Sample proportion is- We…

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

A:

Q: Researchers wanted to know if therapy could help smokers quit smoking. Of the 71 smokers they…

A: Given, The sample proportion is,

Q: A guidance counselor at a university is investigating demand for study abroad. The question before…

A: Formula : CI=(p̂1- p̂2)± ME

Q: The digital marketing specialist would like to test the claim that the percent of customers who use…

A: Formula : Test statistic

Q: What is the most important thing to remember when choosing a sample? a. Samples should be chosen at…

A: We have given that the statement about to the sample. It is a part of population.

Q: ​Claim: Fewer than 90​% of adults have a cell phone. In a reputable poll of 1104 ​adults, 85​% said…

A: We have given that  Sample size n =1104 Population proportion p=90%=0.90 Sample proportion…

Q: Consider a simple poll that is measuring the proportion of citizens that hold a particular political…

A:

Q: ​Claim: Fewer than 92​% of adults have a cell phone. In a reputable poll of 1172 adults, 86​% said…

A: The hypotheses for the test are given below. Null hypothesis: H0: p = 0.92 Alternative hypothesis:…

Q: Exhibit-C. An insurance company selected samples of clients under 18 years of age and over 18 and…

A: It is given that: "Under age of 18" group:n1 sample size=500x1 No. of accidents=180"Over age of 18"…

Q: Health insurance benefits vary by the size of the company (the Henry J. Kaiser Family Foundation…

A: a:For the given data, the chi-square test for association is appropriate.Null Hypothesis:H0: The…

Q: (a) Find the z-score of the attendance at the theater in Aldo's town relative to the attendances…

A: (a) The mean is 230 and standard deviation is 19. The z-score of the attendance at the theater in…

Q: product testing organization uses a survey of readers to obtain customer satisfaction ratings for…

A: Given that  Sample size n1=280 , n2=300 Sample means x1=83 , x2=82

Q: Consider the implications of selecting a sample based upon your choice as a researcher and how you…

A: If a sample is selected upon the choice of a researcher then it is expected to have a bias which…

Q: If you have a study design that requires a single sample exposed to different levels of the…

A: Independent samples are taken from two different populations.

Q: A researcher wants to study whether there is a relationship between personality type and the type of…

A: The given data is,     Types of class   Total     In-person Online   Personality type…

Q: In order manufacturer is claiming that its new 2021 SUV model will have better gas mileage than the…

A: (a) The null and alternative hypothesis is, H0:u=30H1:u>30              (right tailed/one tailed)…

Q: In a statistic class, 10 scorea were randomly selected with the following results were…

A:

Q: Is the sample mean always the most frequently occurring value? If so, explain why. If not, give an…

A: No, Sample Mean is not the most frequent Occuring Value.   Mean= Sum of Observations / No.of…

Q: What is the mode for this data set

A: The data that has the highest frequency is called mode. In other words, it is the most frequent…

Q: poll of 60 people asking “do you prefer dogs or cats?” Was taken, and 53 of those surveyed said they…

A: Sample size n =60 Favorable cases x =53 Sample proportion p^=x/n  =53/60 =0.8833 Population…

Q: A recent debate about where in the United States skiers believe the skiing is best prompted the…

A: A recent debate about where in the United States skiers believe skiing is best prompted the…

Q: Professors collected data consisting of eye color and gender of statistics students. Among 912 male…

A:

Q: Looking at whether how much Disney+ a person watches (3 hours, 2 hours, or 1 hour a day) and what…

A: Here, the dependent variable is the overall happiness of a person watching Desney+ and the beverage…

Q: For this discussion, you will come up with an example of a situation in which two means would need…

A: Describe a possible study that could be conducted to compare two groups means:

Q: If you know the p-value for a one-sided test is 0.0080, using the same statistics you used for the…

A: Answer:- Given, The p-value for a one-sided test is 0.0080. We know that "The two-tail p-value is…

Q: A national study report indicated that 20.5% of Americans were identified as having medical bill…

A: Given: n= 400 ,x= 95.0 p= 0.205 p̂= 95 / 400

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Given,margin of error(E)=0.025Assume sample proportion(p^)=0.5α=1-0.90=0.1α2=0.05Z0.05=1.645   (from…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: The random variable X follows binomial distribution. The confidence level is 90%. The margin of…

Q: Suppose you plan to conduct among 2,500 Grade 12 students enrolled in the stem Track. How many…

A:

Q: expensive). The toy was priced the same at all retail stores. Compute the percentage of variance…

A:

Q: A certain collector is choosing between 4 different paintings to buy. To help him decide, he asked…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: Assume that experience with the satisfaction rating scale indicates that a population standard…

A: Given n1=280, n2=300  Level of significance ɑ=0.05   x̄1=83, x̄2=82  Standard deviations σ=14

Q: ​Claim: Fewer than 91​% of adults have a cell phone. In a reputable poll of 1119 adults, 83​% said…

A:

Q: If a researcher concludes that worker productivity increased when playing upbeat music but was…

A: Since we know that A type I error  occurs when we reject a null hypothesis when it is actually…

Q: A website posts evaluations on airlines. It posts the most positive and the most negative comments…

A: For the given statement