Rick Douglas, the new manager of food Barn, is interested in the percentage of customers who are totally satisfied with the store. The previous manager had 86 percent of the customers totally satisfied, and Rick claims the same is true today. Rick sampled 187 customers and found 157 were totally satisfied. At the 1 percent significance level, is there evidence that Rick’s claim is valid?

Q: A county clerk wants to improve voter registration. He wants to send out reminders in the mail to…

A: Solution: Given information: n1= 625  Sample size of eligible voters in no reminders group n2= 625…

Q: In a recent survey of 47 science teachers, 32 said the school-provided textbooks were adequate. Find…

A: Survey of 47 teachers N=47 n=32 Sample proportion = (n/N)  We have to calculate  Standard error of…

Q: Twenty years ago, 53% of parents of children in high school felt it was a serious problem that high…

A:

Q: Saeko owns a yarn shop and want to expands her color selection.         Before she expands her…

A:

Q: A health food store owner determined that 21% of her customers bake their own bread each week. A…

A: 15% of the customers out of 75 customers bake their own bread each week.

Q: b)  If the sample size was increased to 10,000 American movie-goers, what effect would this have on…

A:

Q: Who reports better self-rated health, married or unmarried individuals?  Group of answer choices…

A: Since a higher value of y means better self health and the coefficient of marital status is…

Q: A finance blogger is writing an article about credit card use. As they write their article, the…

A: If P-value ≤ α, reject H0. If P-value > α, do not reject H0.

Q: A researcher is interested in determining if the proportion of children that collect specific type…

A: The null and alternative hypothesis is; H0: The proportion of children that collect a specific type…

Q: A random sample of n, = 154 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 11…

A: Given Information: Sample 1: Sample size n1=154 x1=11 Sample 2: n2=131 x2=7 (a) Level of…

Q: A researcher is interested in determining if the proportion of children that collect specific types…

A: The given information is that the proportions of children, 36% of them collect Legos, 19% of them…

Q: A random sample of n1 = 157 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 12…

A: Introduction: Denote p1, p2 as the true population proportions of high school dropouts of the two…

Q: Radio Shack reported that they sell 21% of all home computers. a) Is this claim supported at the 1%…

A: GivenNo. of computers (n)=700x=120p^=120700=0.171α=0.01

Q: who

A: Given:   Men Women Plan to vote 160 175 Do not plan to vote 140 125 Level of significance,…

Q: A hospital found out that there is a higher incident of food poisoning in adults than in children.…

A:

Q: USA TODAY† reported that "American women favor Kate Middleton as a shopping buddy over Michelle…

A: Experimental study: In experiment study, we assign people or groups of people and apply some…

Q: Twenty years ago, 46% of parents of children in high school felt it was a serious problem that high…

A:

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A:

Q: The Institute of Education Sciences measures the high school dropout rate as the percentage of 16-…

A: 1) The hypotheses for the test are given below. Null hypothesis: H0: p = 0.081 Alternative…

Q: The table below summarizes data from a survey of a sample of women. Using a 0.05 significance​…

A: Given: N=1100 α=0.05 The observed values of the given data are given below   Man Woman Total…

Q: In a recent Gallup poll, 507 adults age 18 and older were surveyed and 269 said they believed they…

A:

Q: A researcher is interested in determining if the proportion of children that collect specific types…

A: Given Solution:

Q: Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high…

A:

Q: The Institute of Education Sciences measures the high school dropout rate as the percentage of 16-…

A: In 2009, high school dropout rate between 16-24 years olds was 8.1% . A pooling company took a…

Q: Can you reject the claim that the proportion of 18 to 24-year-olds living in their parents' homes…

A: Given that  Sample sizes n1=248 , n2=244 Sample proportion p1^=0.515 , p2^=0.412

Q: The Institute of Education Sciences measures the high school dropout rate as the percentage of 16-…

A: As per our guidelines we are suppose to answer only one question. Given,sample size(n)=1000sample…

Q: Does decision making or happiness vary significantly by type of relationship?

A: A random sample of 18 couples has been assessed on a scale that measures the extent to which power…

Q: ppose you are interested in testing whether the mean earning of men in California differs…

A: It is given that n1 is 123 and n2 is 88.

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: The hypothesis tests, contain two hypothesis: null hypothesis and alternate hypothesis. The…

Q: A random sample of n1 = 157 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 12…

A:

Q: For a certain year, a study reports that the percentage of college students using credit cards was…

A:

Q: 2. For Americans using library services, the American Library Association claims that at most 70% of…

A: Given: The random sample of patrons selected are n=100. The number of patrons who borrowed books are…

Q: An online bookseller is considering selling an e-reader but will do so only if they have evidence…

A:

Q: In the past, 35% of the students at ABC University were in the Business College, 35% of the students…

A: It is given that the 35% students are in Business College, 35% students are in Liberal Arts College…

Q: John Isaac Inc., a designer and installer of industrial signs, employs 60 people. The company…

A: ed: Categories Number of Visits Expected Proportions Primary care 29 0.53 Medical specialist…

Q: subjects has a distribution that agrees with the distribution of state populations.

A: Given that Four northwestern States, Washington=51% of total population that is P1=0.51 Oregon=30%…

Q: Carry out a hypothesis test for a significant difference between the two population proportions, at…

A:

Q: Example 17: In a sample of 1000 citizens of India, 540 are wheat eaters and the rest are rice…

A: In order to test the claim that both rice and wheat are equally popular, determine whether the…

Q: A. Since the sample sizes are both less than​ 30, it must be assumed that the samples are…

A: (a) Here the sample sizes are less than 30. so, we have to conduct a two-sample T-test  Assumptions…

Q: A researcher wishes to test whether the proportion of college students who smoke is the same in four…

A:

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: Given: Hypothesized population proportion(p0)=0.52Number of parents in survey(n)=800Total parents…

Q: 586 students participated in a study that aims to determine if the level of self-esteem is…

A: The purpose of study was to check the association  between level of self-esteem and  the levels of…

Q: A curious student wants to see if she can conclude that a higher proportion of Woodland College…

A: Given α=significance level=0.05 For Woodland college students:n1=sample size for Woodland college…

Q: The marketing manager of a shower gel manufacturing company wishes to know whether the three…

A: From the “critical value of Chi square table” at the 0.10 level of significance with the 2 degrees…

Q: A study is designed to determine whether or not taking four years of math in high school helps…

A: Here we should check which statement is not true. Please find the solution below.

Q: Suppose that, in a comparison of two holiday companies’ customers, of the 75 who went with Happy…

A: Given data : x1= 45 n1= 75 x2= 48 n2= 90 significance level, 0.025

Q: The Institute of Education Sciences measures the high school dropout rate as the percentage of 16-…

A: Here to check the fact first we set null and alternate hypothesis, then we find p-value of the test.…

Q: According to the NIMH website the average number of adult Americans diagnosed with a “serious mental…

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

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.