The CEO of a large cable company claims that 75 percent of his 1,000,000 customers are satisfied with the service they receive. To test this claim, the local newspaper surveyed 100 customers, using simple random sampling. 76 were satisfied and the remaining were unsatisfied. Based on these findings from the sample, can we reject the CEO’s hypothesis that 75% of the customers are satisfied? Use a .05 level of significance. Include the null and alternative hypothesis, test statistic, p-value, decision, and conclusion.

Q: Professor Jennings claims that only 35% of the students at Flora College work while attending…

A: Given: Sample size,n= 76 Number of students who have jobs,x= 35  Level of significance=0.05

Q: b. Compute the test statistic. (Round your answer to 3 decimal places.) The test statistic is 2.892

A: The table helps to obtain the sample mean and sample standard deviation: Here, di=Before-After…

Q: A college department pilots a New program with 9 of its 20 students and compares income in each…

A: The following data is provided:  New  Old 144 98 18 64 45 80 70 23 341 0 66 11 34…

Q: If a hurricane was headed your way, would you evacuate? The headline of a press release states,…

A: Sample size = n = 4625 Sample proportion = p̂ = 0.32

Q: (a) What are the null hypothesis H, and the alternative hypothesis H, that should be used for the…

A:

Q: You work for a marketing firm that has a large client in the automobile industry. You have been…

A: (a) Critical value: Using the z-table, the critical value at 98% confidence level is  z0.022=2.326…

Q: polling organization conducted telephone surveys in March of 2004, 2005 and 2006. In each year, 1001…

A: Given: Level of significance = 0.05 Observed frequency table:   2004 2005 2006 Total…

Q: In the US, 44.8% of all people have type O blood, 40.8% have type A blood, 11.3% have type B blood…

A: a. The expected frequencies are, Outcome Frequency Proportion Expected frequency O 1317 0.448…

Q: The South Carolina Real Estate Association claims that the median rental for three bedroom…

A: Given information: The median rental, M=$1200. From a sample of 149 units, 5 units were rented for…

Q: In the US, 43.5% of all people have type O blood, 39.7% have type A blood, 11.9% have type B blood…

A: Outcomes Frequency O1271A1123B328AB158Total2880

Q: According to a Yankelovich poll, women spend an average of 19.1 hours shopping during the month of…

A:

Q: the food marketing insititute reports that 28% of households spend less than $100 per week on…

A: the probability that less than 102 households spend less than $100 per week on groceries is…

Q: Suppose the Humane Society claims that 30% of U.S. households own cats. You believe your community…

A: Consider that p is the population proportion and n is the sample size. The requirements under which…

Q: uppose a random sample of 100 cards has 50 rookies, 45 veterans, and 5 All-Stars. Is this consistent…

A: Given Aplha = 0.05 Df=N-1    =3-1=2

Q: A union of restaurant and foodservice workers would like to estimate the mean hourly wage, μ, of…

A:

Q: A union of restaurant and foodservice workers would like to estimate the mean hourly wage, u, of…

A:

Q: average, college freshmen spend 7.5 hours a week  going to parties. One administrator does not…

A: Given that  Sample size n =100 Sample mean =6.6 Standard deviation =9

Q: Use the following to answer questions 2-12.   A high school principal wanted to know if there was…

A: The data shows the absences among the four grades.

Q: A test of qualifying skills was taken by random samples of aspiring court reporters in both Iowa and…

A: In the bootstrap distribution, many samples of same size are randomly generated from the population…

Q: In a study, a large sample representative of the households in the US were asked about their smoking…

A: Research: Research is conducted to acquire knowledge and skills or to address the situation about…

Q: A polling organization conducted telephone surveys in March of 2004, 2005 and 2006. In each year,…

A: It is needed to test whether the proportion falling in the three credict card response categories is…

Q: Determine whether the following sampling is dependent or independent. Indicate whether the response…

A: Determine whether the following sampling is dependent or independent. Indicate whether the response…

Q: A high school principal wanted to know if there was a difference in absences for 9th grade, 10th…

A: Given data: 9th grade 10th grade 11th grade 12th grade 6 10 17 15 9 12 8 16 6 11 11 12 7…

Q: A teacher is experimenting with a new computer-based instruction and conducts a study to test its…

A: Solution  The teacher can use a two-sample t-test for comparing two population means in the…

Q: A recent national report states the marital status distribution of the male population age 18 or…

A: a.   Consider that pi’s are the proportion of never married, married, widowed and divorced,…

Q: In 2011, the "average" Tasmanian 12-year-old spent 144 mins on the internet per day using a mobile…

A:

Q: A radio news story claimed that half of all U.S. adults have Internet access. In a national poll…

A:

Q: A polling organization conducted telephone surveys in March of 2004, 2005 and 2006. In each year,…

A: The objective is to determine that there is evidence that the proportion falling in the three credit…

Q: A poll in one country indicated that 48​% favor imposing the death penalty​ (the country currently…

A: Sample Size:The formula for the sample size is as follows:

Q: A union of restaurant and foodservice workers would like to estimate this year's mean hourly wage,…

A: Given Data:Meanμ =$8.16Sample mean x =$8.46Sample standard deviation s =$1.15Type -I error:Rejecting…

Q: who live within 20 miles of the coast in high hurricane risk counties of eight southern states. In…

A: It is given that sample size (n) is 4,625 and p hat value is 1-0.32 = 0.68.

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

A: Here you're claim that 3.2% of items made on your production line are defective. The hypotheses…