Imagine you predict that it will take a salesclerk at a mall longer to help out a potential customer who is dressed in sloppy clothes (untucked t-shirt and torn jeans) than a potential customer dressed in business attire. You run the study and find support for your hypotheses, with the obtained value exceeding the critical value at the p < .05 level. Why wouldn't you want to say that you proved your hypothesis correct? What other reasons might there be to explain your findings?

Q: At 0.05 level of significance, test the hypothesis that the new procedure is much better than the…

A: Given : x1= 75 n1= 1500 x2= 80 n2= 2000 significance level, 0.05

Q: A researcher conducts an ANOVA, and obtains an F statistic of 5.0. This means:    a) the result is…

A: In ANOVA, F statistic is given by

Q: A random sample of 300 male students at PCC shows that 230 of them have internet access at home…

A: Given data : x1= 230.0 n1= 300 x2= 290.0 n2= 350 significance level,…

Q: The test statistic of z = −1.79 is obtained when testing the claim that p = 1/4. Using a…

A: the critical​ value = 2.58   since |1.79| &lt; 2.58, we fail to reject H0

Q: Imagine you predict that it will take a salesclerk at a mall longer to help out a potential customer…

A: Introduction: Denote μ1, μ2 as the true mean times taken by the salesclerk at the mall to help out a…

Q: Starnuts needs their automatic filling machine to put 20 ounces of volumizing shampoo in each bottle…

A: (a)   Determine about the parameter of the population.   The parameter of the population interest is…

Q: Assuming alpha level is held constant, if someone does a one-tailed test the critical value will…

A: Here, we use  the concept of hypothesis testing....  When alpha is constant.       (Given)

Q: About half of the police officers in Baltimore, Maryland, have completed a special course in…

A: One proportion Z test is applicable

Q: If I am conducting a one-tailed z test and my risk is 1% what should my critical value be?

A: From the provided information, The level of significance (α) = 1% that is 0.01 The test is one…

Q: What is the Zstat and the Critical Value of the above question?

A: Zstat=2.79

Q: A manufacturer of automobile products has developed a new wax and is interested in comparing the new…

A: It is tested whether the new wax will protect the car for longer period of time than the standard…

Q: A new chemotherapy drug is released to treat leukemia and researchers suspect that the drug may have…

A: Given information:               Number of Reported Side-Effects Old Drug         0          1…

Q: To deal with the phenomenon of alpha inflation when doing multiple t-tests, what post-hoc tests such…

A: In Bonferroni Correction , first divide the desired alpha level by the number of comparisons.

Q: if your test statistic is more extreme (farther from 0) than the critical value, and has the same…

A: Rejection rule: If the test statistic for right tailed test is greater than the critical value, then…

Q: What is the obtained value – does the critical value exceed the obtained value? What does this mean…

A: Concept: Critical value of t is seen in table at DF=n1+n2-2

Q: A baker is testing a new leavening process used in producing bread that is believed to reduce the…

A: Consider that µ1 is population mean calories content for new process and µ2 is population mean…

Q: A new chemotherapy drug is released to treat leukemia and researchers suspect that the drug may have…

A:

Q: 1. State your hypotheses (in words). 2. Calculate the degree of freedom. 3. Identify the critical…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: In table below are indicated the numbers of students passed and failed by three instructors. Test…

A: The chi square test are used to measure whether there is any relationship exist between the…

Q: Elsa is using a one-sample 1-test with a sample size of 5 to test the null hypothesis, Ho : u = 9,…

A: The sample size is 5, alternative is greater than indicating that the test is right tailed test, and…

Q: A commonly cited study says that 49% of students study less than 5 hours per week. A researcher does…

A: In a hypothesis test,Null Hypothesis proposes that there is no statistical signifiance exists, or…

Q: Elsa is using a one-sample ?‑test with a sample size of 11 to test the null hypothesis, ?0:?=6,…

A: Given Elsa is using a one-sample t‑test with a sample size of 11 to test the null hypothesis,

Q: Suppose you are testing the null hypothesis that a population mean is less than or equal to 46,…

A:

Q: UESTION 4 rug company is testing to see if their new drug does lower total cholesterol. The used a…

A: In this case, we conclude that the total cholesterol levels have decreased, i.e, the Alternative…

Q: A tax accountant would like to test the claim that the proportion of individuals who owe when filing…

A: From the given information,  α=0.005.   Null Hypothesis:    H0: µ ≥0   Alternate Hypothesis:   Ha:…

Q: For each problem, a) identify the null and alternative hypothesis, b) find the critical value and…

A: (a) The null hypothesis is a simple statement about the value of the population parameter which is…

Q: A random sample of 100 students at a high school was asked whether they would ask their father or…

A: Claim : There is no difference in the proportions.   Hypothesis : H0 : p1 = p2 H1 : p1 ≠ p2 It is…

Q: of all U.S. households that owned at least one TV set, 83% had two or more sets. A local cable…

A: A. The following null and alternative hypotheses for the population proportion needs to be tested:…

Q: What is the Degrees of Freedom and What is the t-critical value at alpha .05?

A: Here we want to know t critical and df at alpha 0.05.

Q: . A new chemotherapy drug is released to treat leukemia and researchers suspect that the drug may…

A: From the provided information, R1 = 31.5 R2 = 31.5 And n1 = n2 = 5 The hypotheses can be constructed…

Q: If you have a sample size of 50 and you are comparing 3 groups at the .05 level- what is the…

A: We are provided with the following information, Sample size = 50 Number of groups to compare = 3…

Q: The test statistic of z=−2.60 is obtained when testing the claim that p<0.63. a. Using a…

A: Given,   Test statistic: z = -2.60   Claim: p&lt;0.63

Q: A new chemotherapy drug is released to treat leukemia and researchers suspect that the drug may have…

A: Given that Number of Reported Side-EffectsOld Drug 0 1 1 3 5New Drug 0 0 1 2 4

Q: If the z-value is within the critical region, what should be done with the hypothesis?

A: Rejection rule:1) if the test statistic value  fall outside critical regionthen we fail to reject…

Q: For question #2, identify the null hypothesis (Ho) from choices given.   For question #3 give just…

A: Solution-: Given: μ0=98,σ=6,x¯=94,n=35,α=0.05 We want to, (2) Identify null and hypothesis (3) Test…

Q: A limousine company is concerned with increasing costs of maintaining their fleet of 150 cars.…

A: Let p be the population proportion. The population proportion is 0.36, and sample size is 20.…

Q: A new chemotherapy drug is released to treat leukemia and researchers suspect that the drug may have…

A: The hypothesis test is a statistical method in which one using the sample data try to check the…

Q: 2. If the t-computed value is 2.430 and the critical value is 2.011, what will be the decision? A.…

A: We have given that  Test statistic (t) =2.430 , and t critical=2.011   Note - According  to bartleby…

Q: If the calculated value of Chi-square is less than the critical value of Chi-square, would you…

A: Chi square test is used to determine the difference between categorical variables in the same…

Q: You predict that a salesclerk at the mall will take longer to help a potential customer that is…

A: It is given that a sales clerk at the mall will take longer to help a potential customer that is…

Q: Give the expected  oxygen consumption if the maximum pulse rate is 160 bpm

A: Here, the response variable ia oxygen consumption and independent variable is maximum pulse rate.

Q: why are large x2 values sometimes obtained when the null hypothesis true?

A: A large chi-square value indicates that the data does not fit very well, that is, there is no…

Q: A new chemotherapy drug is released to treat leukemia and researchers suspect that the drug may have…

A: The data are given, First we arrange the data and give the rank. 1) sort the combined value of both…

Q: A sample of patients is tested to determine if they have any hospital borne infections. How large of…

A: The random variable X follows normal distribution. We have to find the sample size. This is z-test…

Q: n, what can you determine about the critical point?

A: Computation of critical point.

Q: The test statistic of z=−2.97 is obtained when testing the claim that p=3/5.   a. Using a…

A:

Q: Elsa is using a one-sample t-test with a sample size of 13 to test the null hypothesis, Ho: u 6.…

A: