Of a random sample of 69 health insurance firms, 47 did public relations in-house, as did 40 of an independent random sample of 69 casualty insurance firms. Find and interpret the p-value of a test of equality of the population proportions against a two-sided alternative.

Q: In a random sample of 120 cheerleaders, 54 had suf-fered moderate to severe damage to their voices.…

A: For a 90% confidence level the z-critical value is 1.645 using the Excel formula “=NORM.S.INV…

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

A: Critical value:   From the given information, the number of rows is 2 and the number of columns is…

Q: A researcher designs an experiment in which the single independent variable has five levels. If the…

A: Given A researcher designs an experiment in which the single independent variable has five levels.…

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: In 1945​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: Given α=0.05         n1=1100       (for recent survey)n2=1100       (for in 1945 survey) x1…

Q: In 1950​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: Given data,   x1= 396                                                  x2= 319 n1=1100…

Q: In an attempt to document the percentage of teenagers in the United States who play video games for…

A: The process of drawing conclusions about the population parameters by using the sample statistics,…

Q: In a survey of 399 randomly selected households conducted in the U.S., it was found that 158 of the…

A: Given, The objective is to find the best point estimate of the proportion of households that have…

Q: In a study to estimate the proportion of smokers among the residents in a certain city and its…

A: To testH0:p1=p2H1:p1≠p2

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In poll,…

A:

Q: A random sample of 1400 Internet users was selected from the records of a large Internet provider…

A: Given data A random sample of 1400 internet users was selected  and asked whether they would use…

Q: In a random sample of 76 people, 38 are classified as​ "successful."   a. Determine the sample​…

A: Given that in a random sample of 76 people, 38 are classified as​ "successful."  a) The sample​…

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 types…

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

Q: In 2001​, researchers investigated the effect of​ weed-killing herbicides on house pets. They…

A: a) Given that n1=840x1=445n2=116x2=20 Consider,…

Q: n New York City, a study was conducted to evaluate whether any information that is available at the…

A: (a) Obtain the sample size of a preliminary estimate for p is 0.10 with the 95% confidence. The…

Q: In 1945​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: In 1945 survey, among 1100 adults 407 indicate that they were total abstainers. The number of…

Q: In 1949, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: Given: n1=1100x1=374p1=0.34n2=1100x2=330p2=0.30

Q: In a CBS poll of 1289 adults, nationwide, asking whether they favor or oppose teacher and school…

A:

Q: The manager of a fast-food restaurant wants to reduce the proportion of drive-thru customers who…

A: Given, P(Type II error)=0.14 Power is the probability of rejecting the null hypothesis when it is…

Q: Do the states that voted for McCain have a different average percent of heavy drinkers than the…

A: 1. A study is conducted to determine whether McCain states and Obama states have different average…

Q: What is the sample proportion such that 95% of all others is symmetric around 36%?

A: 1. A sample of 200 students is taken in which 36% of all college students use an Apple i phone only.…

Q: In a CBS poll of 1289 adults, nationwide, asking whether they favor or oppose teacher and school…

A:

Q: Based on a sample of 80 men, 35% owned cats Based on a sample of 40 women, 50% owned cats The test…

A:

Q: In another Harris poll, adults were asked if they are in favor of abolishing the penny. Among 200…

A: From the given information,                        Sample size (n) =200 Probability of success…

Q: In an exit poll of 625 scientifically and randomly selected voters, 340 expressed support for…

A: Given data, n=625 x=340 sample proportion(p)=?

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

A: Given Solution:

Q: Are blonde female college students more likely to have boyfriends than brunette female college…

A: Given : p1^ = x1n1      = 389637      = 0.6107 p2^ = x2n2      = 342630      = 0.5429

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: A newspaper reported the results of a political poll about which candidate likely voters preferred,…

A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: The margin…

Q: In the study conducted by selecting 100 female and 100 male students in order to test the claim that…

A: given that  p- value=0.0228

Q: le of teenage drivers living in Dover City for H0: p = 0.50 and Ha: p < 0.50, where p is the…

A: Given: Hypothesis: H0 : p=0.50Ha : p&gt;0.50 Sample size, n = 150 Level of significance, α=0.05 Part…

Q: In a survey of 526 US business, 400 indicated that they monitor employee's web site visits. Is there…

A: Given: Out of 526 US businesses, 400 indicate that they monitor employee's website visits. The…

Q: As a part of a class project, a teacher brings a jar of 200 jawbreakers of three different colors,…

A: Given that one student draws 30 jawbreakers from the jar, of which 9 are orange, 11 are red and 10…

Q: A hospital has studied its patient history and had concluded that 2% of patients that have been…

A: Given: 2% of patients have been admitted with staff bacteria.

Q: an airline promotion to business travelers is based on the assumption that two-thirds ofbusiness…

A: From the information, the given values are, a) Claim: Two-thirds of business travelers use a laptop…

Q: A school board would like to determine whether there is a difference in average SAT scores for…

A: Paired data is used when experimental Unit is same on which two different treatment are apllied

Q: A plan for an executive travelers' club has been developed by an airline on the premise that 5% of…

A: (a) Null hypothesis: The probability of the customer who qualified for membership is correct.…

Q: 4. Out of 450 randomly selected people in a soccer match, 225 of them were students. Compute the…

A: 450 people are selected randomly; n=450 225 of them were students; x=225

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

A:

Q: A researcher finds that of 1000 people who said that they attend a religious service at least once a…

A: Denote p1 is true proportion of people who said that they attend a religious service at least once a…

Q: If the alternate hypothesis states that p does not equal 4,000, what is the rejection region for the…

A: Given ,  alternate hypothesis Ha:μ≠4000

Q: A health journal found that 56.4​% of college students who lived in coed dormitories consumed…

A: From the given information, p=0.564 n=175

Q: In a random sample of 68 people,17 are classified as​ "successful." a. Determine the sample​…

A:

Q: A telephone company claims that more than 15% of its customers have at least two telephone lines.…

A: It is given that Sample size n = 250 Number of customers who have at least two telephone lines, X =…

Q: Because of the increased cost of housing, a national real estate board wants to compare the…

A: (a): Null hypothesis H0: proportion of rural areas = proportion of metropolitan areas H1: proportion…

Q: According to YCharts in 2018, the unemployment rate for 15- to 24-year-olds in British Columbia was…

A: Sample size = 400 Proportion of sample having unemployment of 15-24 years = 0.094  Proportion of…

Q: A recent poll of 1001 Americans age 18 and over conducted in May of 2013 found that 80% of the…

A: GIVEN age =18 the respondents= 80%=0.8