For the following exercise where applicable: a. State the hypotheses and identify the claim. b. Find the critical value(s). c. Compute the test value. d. Make the decision. e. Summarize the results. Breakfast Survey: A dietitian read in a survey that at least 55% of adults do not eat breakfast at least 3 days a week. To verify this, she selected a random sample of 80 adults and asked them how many days a week they skipped breakfast. A total of 50% responded that they skipped breakfast at least 3 days a week. At alpha= 0.10, test the claim

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: Given information Error = 4% = 0.04 Confidence level = 0.95

Q: A maker of a certain brand of low-fat cereal bars claims that the average saturated fat content is…

A: The question relates to one sample t-test.Let random variable x denote the saturated fat content in…

Q: The table below summarizes data from a survey of a sample of women. Using a 0.01 significance​…

A: The following information has been provided:   Man Woman Total Women who agree 499 344 843…

Q: A newsletter publisher believes that 72% of their readers own a Rolls Royce. A testing firm believes…

A: From the provided information, A newsletter publisher believes that 72% of their readers own a Rolls…

Q: A taxi company claims that its drivers have an average experience greater than 12.5 years. A…

A: Consider a variable, X: driving experience.Given that,Sample size, Sample sd, Sample mean, To test…

Q: The table below summarizes data from a survey of a sample of women. Using a 0.01 significance​…

A: a. It is needed to test whether the proportions of​ agree/disagree responses are the same for…

Q: Find the required sample size, n, if c=0.89, E=0.05, and  is unknown.

A: Solution: Given, c=0.89 E=0.05 Proportion is unknown. The critical value for zα/2 =1.598 using Excel…

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A:

Q: A national health survey weighed a sample of 260 boys aged 6-11 and found that 45 of them were…

A: Given that: Sample 1(boys): n1=260x1=45 Sample 2(girl): n2=230x2=30 Level of significance, α=10%

Q: What does brand loyalty mean to consumers? According to a recent research report, 39% of consumers…

A: Probability that a consumer associate trust with brand loyalty is; p = 39% = 0.39 (a) Given the…

Q: As a quality control inspector, you have previously believed a claim that 3.2% of items made on your…

A: Given: Sample size (n) = 420 22 of the items are defective (x) = 22 The hypotheses can be…

Q: A car dealer claims that on average, the age of cars owned by professors is less than the age of…

A: Given that x̄1 = 5.9 s1 = 1.6 n1 = 40 x̄2 = 7.1 s2 = 1.8 n2 = 36…

Q: Based on this data, what is the expected number of sales (per 100 calls)?

A: The data is given on the no. of sales made per 100 calls.  Sample size = no. of salesperson = 85 To…

Q: Most universities and colleges require an SAT score as one of the inputs to an admissions decision.…

A: It is given that the SAT scores for 10 students and their college GPAs.

Q: In a study on caffeine and stress, college students (n = 10) indicated how many cups of coffee they…

A: The research hypothesis is that there is an association between stress and cups of coffee consumed…

Q: What does brand loyalty mean to​ consumers? According to a recent research​ report, 39​% of…

A:

Q: A certain drug is used to treat asthma. In a clinical trial of the drug, 30 of 282 treated subjects…

A: From the provided information, Population proportion (p) = 0.10 The hypotheses can be constructed…

Q: f.       Interpret the p-value, according to its definition. (You are not asked to make a decision…

A: Given N=600 Mean=52.38 Standard Deviation=9.726 Standard Error (mean)=0.397 t=6.006 df=599…

Q: Between 27 April 2020 and 10 May 2020, Gallup surveyed a random sample of 7,962 U.S. adults…

A: The sample proportion is 0.4705.

Q: Assume you are given the following scores from two randomly drawn, independent samples:    X: 5,…

A: There are two independent samples which are X and Y. We have to test whether the populations from…

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: A researcher wishes to estimate the proportion of adults who have high-speed internet access. What…

A:

Q: Perform the following hypothesis test of a proportion: HO: p = 0.125 HA: p 0.125 The sample…

A:

Q: ou are a manager for a local convenience store. You want to determin proportion of your customers…

A: Given that  Margin of error =E=6.50%=0.0650 99% confidence.

Q: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: Given a 95% C.I. = (34.14 mm, 36.02 mm) for a sample of Wooly Bear caterpillar lengths (preceding…

A: The 95% confidence interval is (34.14 mm, 36.03 mm).

Q: The null and alternative hypotheses are statements made about A. population parameters. B. sample…

A: Hypothesis testing is one of the statistical technique which is used to test a claim in the…

Q: During a research study, subjects are asked about their religious affiliation in a questionnaire…

A: Subjects are asked about their religious affiliation in a questionnaire compiling demographic and…

Q: (d) A sample of 800 workers indicated whether they are single or married and whether they work…

A:

Q: As a quality control inspector, you have previously believed a claim that 3.2% of items made on your…

A: From the provided information, Sample size (n) = 420 22 of the items are defective that is x = 22…

Q: If the level of significance in a hypothesis test is 1 %, what would the p-value have to be for…

A: We fail to reject the null hypothesis when the p value is greater than the significance level. We…

Q: A sample is selected from a normal population, and resulting data are as follows: 45.2, 51.5, 49.4,…

A: a. Null hypothesis: H0: µ = 50. Alternative hypothesis: H1: µ >50.

Q: The national percentage of automobile accident fatalities that are alcohol related is 39%. In a…

A: