For this problem, your answer should be rounded to two decimal places. In a particular municipality, it is believed that 25 percent of homes are not properly insulated. In order to test ?0:?=.25 vs. ??:?≠.25 (where ? is the population proportion of homes that are not properly insulated) a random sample of 300 homes was selected. In the sample, it was found that 108 homes were not properly insulated. If the null hypothesis is true, then the z-score for the sample proportion

Q: Q12. If 150 households were surveyed out of which 120 households have internet fiber cable, then…

A: Given Data: x=150-120=30 n=150

Q: You would like to conduct a survey to estimate the proportion p of consumers who like a new brand of…

A:

Q: Only 18% of registered voters voted in the last election. Will voter participation decline for the…

A: a. we should use z test for one sample proportion.

Q: Lacey is interested in determining whether people who have experienced a traumatic event experience…

A: Given : Lacey is interested in determining whether people who have experienced a traumatic event…

Q: With your sample of 25 inmates, you want to test if the population mean age is different from 40 at…

A: To determine whether the test should be one-tailed or two-tailed, we need to consider the research…

Q: A random sample of 1020 heads of households was taken from a customer list for a bank. The…

A: Chi-square Statistic is given by, Chi-square= summation (Oi-Ei)2/Ei Where Oi's are observed values…

Q: In 1955, Life Magazine reported that a 25-year-old mother of three worked (on average) an 80 hour…

A: Given that, Sample size of women n=67 Sample average x¯=83 Sample standard deviation s=10 It is been…

Q: Samuel F.B. Morse (1791 – 1872), the creator of Morse Code, claimed that 12% of all letters used in…

A: The population proportion is 0.12. That is, p=0.12.

Q: What statistical test should she use to analyze the data? a. Paired t-test b. One Way ANOVA c.…

A: Answer: Given that, The Superintendent of Schools wants to examine whether there are differences in…

Q: I want a 99% confidence within 2% for the true proportion of bald people in the US.  How many people…

A: Given that, Margin of error E=0.02 Confidence level is 99% Critical value: The two tailed z critical…

Q: sample proportion is p= und to three decimal places as needed.)

A: Given Number of sample of teenagers between 13 to 17 year of ages(n)=280

Q: a. For this study, we should use Select an answer b. The null and alternative hypotheses would be:…

A: It is given that Favourable cases, x1 = 386Sample size, n1 = 590Favourable cases, x2 = 363Sample…

Q: in asking all 349 second graders in a district, it is found that on average, these second grders…

A: The question is about parametric inference Introduction : Parameter : The quantity or number which…

Q: If I have a sample of people’s ages, and the IQR is 20, what does this mean?

A: Given:  IQR for sample of people's ages is 20.

Q: A sample of two hundred and fifty families showed that ninety one owned at least one car. Find an…

A:

Q: Use these results from a USA Today survey in which 510 people choseto respond to this question that…

A:

Q: State the distribution to use for the test (Enter your answer in the form z or tar where af is the…

A: n =77mu = 80xbar = 83s = 10

Q: 100 smokers and 100 non-smokers were followed to see if they developed lung cancer over time. The…

A: Given data: Characteristic Lung cancer Non-lung cancer Total Smoker 70 30 100 NonSmoker 35 65…

Q: a. For this study, we should use Select an answer b. The null and alternative hypotheses would be:…

A: Note: According to Bartleby expert guidelines, we can answer only first question with their three…

Q: . What statistical test should he use to analyze the data?

A:

Q: Housenolds from a community in Montana are shown below. Observed Number of Households in the…

A: Solution:   Given information: n= 411 total observation.  k= 5  Categoris  α=0.05 Level of…

Q: The mayoral challenger claims that less than 30% of residents over the age of 25 have bachelor’s…

A:

Q: 11. 1,200 people visited the most recent car show in Atlanta. A company there wanted to do a survey…

A:

Q: According to a​ newspaper, 58​% of high school seniors have a​ driver's license. Suppose we take a…

A: Sample size=n=200 Population proportion=p=58%

Q: If Ashley wants to test for GPA differences among first-, second-, third-, and fourth-year college…

A: Here, we are testing the GPA differences among first, second, third and fourth year college…

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: (a) Given: Sample Size for 98% CI , E=0.12 without p^ Confidence level =98% Desired Margin of…

Q: Do the needs of patients in the emergency room differ for those who come by car vs. those by…

A: From the given information in the question the observed values are written in this table:…

Q: You are told that the proportion p-hat  of those who answered "yes" to a poll about internet use is…

A: Given,Proportion, Standard error, SE = 0.0458

Q: In a population of 150 pea plants, there are 89 tall-purple plants, 25 short-purple plants, 28…

A: From the given information, Category Observed frequency Proportion Expected frequency=total…

Q: If the p-value of a test is .037 then you would

A: Solution: Test value=0.037 Then find p-value is