USA Today reported that about 47% of the general consumer population in the United States is loyal to the automobile manufacturer of their choice. Suppose Chevrolet did a study of a random sample of 1007 Chevrolet owners and found that 484 said they would buy another Chevrolet. Does this indicate that the population proportion of consumers loyal to Chevrolet is more than 47%? Use α = 0.01. 1. What is the value of the sample test statistic? (Round your answer to two decimal places.) 2. Find the P-value of the test statistic. (Round your answer to four decimal places.)

Q: Based on information from a previous study, r1 = 37 people out of a random sample of n1 = 97 adult…

A: The provided information are:

Q: A researcher conducts an independent-measures study comparing two treatments and reports the t…

A: Given :  A researcher conducts an independent-measures study comparing two treatments and reports…

Q: A sample of n=4 scores has SS=60. what is the variance for this sample?

A:

Q: Based on information from a previous study, r1 = 38 people out of a random sample of n1 = 104 adult…

A: The parametric test contain the assumption of normally distribution. But the non parametric test is…

Q: A study assessed the lung destructive index among smokers and non- smokers provided the following…

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A: Given that,possible chances (x)=40sample size(n)=50success rate ( p )= x/n = 0.8success…

Q: In a test of Ho: µ = 100 against Ha: µ 100, a sample of size 80 produces z = 0.8 for the value of…

A: Given: z =0.8 The null and alternative hypothesis are: H​0​​: μ=100 H​a​​: μ≠100 It is a two tailed…

Q: In a survey of 1,005 adult Americans, 46.9% indicated that they were somewhat interested or very…

A:

Q: ased on information from a previous study, r1 = 38 people out of a random sample of n1 = 105 adult…

A: Introduction: Denote p1, p2 as the true population proportions of people who believe in…

Q: In a clinical trial, 27 out of 875 patients taking a prescription drug daily complained of flulike…

A:

Q: Imagine that your null hypothesis is μ = 16 and your alternative hypothesis is μ ≠ 16 for a…

A: It is given that the test is two-tailed. Level of significance is 0.05 Degrees of freedom is 19–1…

Q: Sarah wants to know how gender impacts heart rate recovery after a maximal exercise test. In order…

A: Given information: The investigator is specially to test how gender impacts heart rate recovery…

Q: You are conducting a study to determine if there is a significant difference between average adult…

A: Solution: State the hypotheses. Null hypothesis: That is, there is no significant difference…

Q: A random sample of  n= 4 individuals is selected from a population with μ = 35, and a treatment is…

A: a. A sample of 4 individuals is selected from a population with mean 35. The sample mean and sum of…

Q: Use the following information to answer the question. A random sample of 54 students from Cabrillo…

A: we have give that  sample size(n)=54  , mu=20  ,sigma =5 and sample mean =21

Q: 7. Was the difference between Group 1 and Group 2 on overall efficacy scores statistically…

A: P-value: It is the probability of finding the observed result under the null hypothesis. Level of…

Q: A researcher uses a repeated-measures study to compare two treatment conditions with a set of 20…

A:

Q: Based on information from a previous study, r1 = 30 people out of a random sample of n1 = 107 adult…

A: Here is given that r1 = 30    r2 = 46    n1 = 107   n2 = 107 we will find proportions of both…

Q: Based on information from a previous study, r1 = 38 people out of a random sample of n1 = 106 adult…

A:

Q: Under what circumstances can you use a z-test instead of a t-test to compare a sample against a…

A: t test and z-test are the statistical tests that are used to find if the value of the sample mean is…

Q: Based on information from a previous study, r1 = 39 people out of a random sample of n1 = 105 adult…

A: The test statistic for the difference of proportion is, Z=p1-q1P^(1-P^)1n1+1n2wherep1 and p2=sample…

Q: For a two-sided test of hypothesis of a single parameter with population variance known, for a given…

A: Given,test statistic(Z)=1.8α=0.05Zα2 =1.96And the given test is two tailed test.

Q: The following data are from a hypothetical experiment in which one group of students took a quiz in…

A: In this study, one group of students took quiz in well-lit room and another group of students took…

Q: Based on information from a previous study, r1 = 37 people out of a random sample of n1 = 97 adult…

A: The proportion of adult Americans who did not attend college believe in extraterrestrials is, Thus,…

Q: To evaluate the effect of a treatment, a sample is ob- tained from a population with a mean of u=…

A:

Q: A random sample of 54 students from Cabrillo College are selected from a normal population with mu…

A: We have  to find Given the test statistics .

Q: The owner of a hair salon is curious about the relationship between the amount of hair cut and the…

A: Let ρ denotes the population correlation between the amount of hair cut and the amount of money…

Q: Can you conclude that the proportion of boys who are overweight differs from the proportion of girls…

A: Here use  proportion test for 2 sample

Q: A major credit card company is interested in the proportion of individuals who use a competitor’s…

A:

Q: According to a certain government agency for a large country, the proportion of fatal traffic…

A:

Q: If a researcher reports a t-statistic with df = 18, how many individual subjects participated in the…

A: Given: Df = 18

Q: An independent-measures study comparing two treatment conditions produces a t statistic with df -18.…

A: DF = n1+n2-2 =18 Here n1=n2 = n

Q: Suppose you got a P-value of 0.023.  Would this be statistically significant at the 0.05 level?…

A: Given,   P-value = 0.023   The objective is to find is this p-value statistically significant at…

Q: Are sexually active teenagers any better informed about AIDS and other potential health problems…

A: Consider that, µ1, µ2, and µ3 define the mean number of teens who are sexually inactive, sexually…

Q: Based on information from a previous study, r1 = 34 people out of a random sample of n1 = 105 adult…

A: Given  r1=34, n1=105, r2=50, n2=105  p1^=r1/n1  p2^=r2/n2

Q: A sample of n = 9 scores has a variance of s2 = 36. What is the estimated standard error for the…

A: Estimated standard Error of Mean =    Given, n=9 S2=36 Therefore substitute n,S2   in above…

Q: Two samples, each with n = 9 scores, produce an independent-measures t statistic of t = 2.00. If the…

A: Given information Two samples each with n = 9 scores D.O.F = 9 + 9 – 2 = 16 t = 2

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

A:

Q: A medical researcher claims that the variance of the heart rates (in beats per minute) of smokers is…

A:

Q: Suppose a study reported that the average persin watched 3.37 hours of television per day. a random…

A:

Q: A study looking at the effects of diethylstilbestrol (DES) exposure and breast cancer risk found the…

A: In this problem, we are studying the effects of diethylstilbestrol(DES) exposure and breast cancer…

Q: Is sunscreen with an SPF 30 rating more effective at preventing sunburn than sunscreen with an SPF…

A: Denote p15, p30 as the true population proportions of sunburn people who wear SPF 15 and 30…

Q: What are the independent and dependent variables for the following examples? What statistical test…

A: The independent variable is the one which is manipulated or changed in a study to see the change in…

Q: A nationwide study of undergraduate students reported that the mean number of drinks consumed per…

A: Given, Degrees of freedom is obtained as: The hypothesis to be tested here is: This is a right…

Q: A repeated-measures ANOVA was calculated with df = 1, 14. If the same data were analyzed with a…

A: here degree of freedom = n-2 = 14

Q: If you collect data from a random sample of 10 students and we would like test for statistical…

A:

Q: The director of student services at Oxnard College is interested in whether women are just as likely…

A: The study is to check whether women are just as likely to attend orientation as men before they…

Q: A sample of 100 yielded a test statistic of 2.1. For a level of significance of 0.05, the null…

A: From the provided information, Sample size (n) = 100 Test statistic (z) = 2.1 Level of significance…

Q: sample with SS=30 and a variance of s2 =10 has n=4 scores. True or False?

A: Given that  Sum of squares (SS) = 30 Variance ( s2) = 10 Sample size (n) = 4   We know that…