would the null hypothesis (H0) be rejected or retained

Q: claimed that 3% of professional golfers are left-handed. Believing this claimed value is incorrect,…

A: Given that Level of significance =alpha =0.05 And  P-value =0.01

Q: F from the F table = 3.59 Calculated value of F from the ANOVA table = 81.87 alpha= .05 P-value =…

A: is not an appropriate null hypothesis for this situation.

Q: The critical z-value for an 85% two tailed hypothesis test is  a. 0.8023 b. 1.44 c. 1.04 d.…

A: For two tailed test we  use critical z value at α2  Since here α=15% Therefore here  we  calculate…

Q: State the null hypothesis, Ho, and the alternative hypothesis, Ha, that would be used to test these…

A: Given, a) Claim: There is an increase in the mean difference between posttest and pretest scores.…

Q: A researcher questions whether there is a correlation between the initial math-related anxiety and…

A: From the given information, the required hypothesis will be given by as follows: H0:ρ=0H1:ρ≠0 Test…

Q: conditions in their local prison. Using the data collected, test the difference between the means.…

A: N1=50,N2=40,X1¯=6,X2¯=4.9,s1=1.2,s2=1.4,α=0.05

Q: there anything else about the experiment in Question 2 which would cast doubt on the reliability of…

A: Given Group of Motorist % of new compound Average mm  1 5 8 2 5.5 8.4 3 6 8.6 4 6.5 8.8…

Q: In 1990, 6.1% of job applicants who were tested for drugs failed the test. At the 0.01 significance…

A: Followings are the exlpnation of the question  Use the One sample Z proportion test Given that, The…

Q: A researcher would like to determine the effects of School Type and SES on Math scores. Conduct the…

A: Here, we use factorial ANOVA To test, Ho: There is no Interaction effect between the factor sctype…

Q: Russell says he is willing to accept a 5% chance of making a Type I error in this study. What is the…

A: Russell says he is willing to accept a 5% chance of making a Type I error in this study. so…

Q: Which of the following can introduce a fatal flaw to a randomized controlled study? OA.…

A: A) Pre-specified outcomes: Having pre-specified outcomes is actually a recommended practice in a…

Q: What can conclude about the null hypothesis from this dataset of weight gain in mice grouped by…

A: The given data can be written in the form of a two-way table as follows   Diet   Stress A B C…

Q: You have a one-sided hypothesis test with alpha level 0.05 and p-value of 0.04. Which of the…

A: Given: α=0.05P-Value=0.04

Q: Of 10000 randomly selected cases of lung cancer, 823 resulted in death within 10 years. Does this…

A: Given claim: The death rate from cancer is 8%. Null Hypothesis: H0: The death rate from cancer is…

Q: Are Republicans more likely than Democrats to display the American flag in front of their residence…

A: Given Information: Republicans: Sample size (n1) = 679 Out of which x1 = 448 displayed the flag on…

Q: A professor at the University of Wisconsin is interested in studying the relationship between…

A: Given information:- Male Officers Female Officer n = 35 n = 20 M = 10.57 M = 8.34…

Q: An experiment was conducted to test if the presence of a witness (no witness, mirror, adult present)…

A: Solution The researcher wants to test if the presence of a witness (no witness, mirror, adult…

Q: A publishing company has developed a study guide (reference book) for GRE Math test. They want to…

A: When the value of sample size is less than 3, then we say that it is a small sample. In a small…

Q: Is there a difference between urban and rural jurisdictions in the hiring of female police officers?…

A: We have been given two samples:   One sample from Rural and One sample from Urban.

Q: The mayor has claimed that the Recession has not affected the towns economy and that it has remained…

A:

Q: an ANOVA provides the following data: Degrees of freedom between groups is 4; degrees of freedom…

A: Solution: Given information: Degree of freedom between group is 4 Degree of freedom within groups is…

Q: For an ANOVA comparing three treatment conditions, what is stated by the alternative hypothesis…

A: Null   hypothesis H0:u1=u2=...=un that is H0:There are no differences between any of the population…

Q: A small random sample of employees at a large company was collected to examine the relation between…

A: Step 1:It is needed to check whether there is an association between the status and gender.The null…

Q: The research prefers to use QQ plots over histograms for checking normality assumptions in general.…

A: Test is that if, on average, there is significant difference in the amount it takes to write a full…

Q: n a study examining the effect of room temperature on academic performance, researchers tested…

A:

Q: In a study examining the effect of room temperature on academic performance, researchers tested…

A: Given: Level of significance, α = 0.05 Two tailed-test. t(22) = 2.44, p < .05, η2 = .21. Mean…

Q: In using statistical test in business, business practitioners face two types of errors: type I and…

A: Type-1 and Type-2 Errors: In Hypothesis testing, based on a result of our test, we can reject the…

Q: An alpha level of 0.05 means that 99% of the means are likely to reflect the null hypothesis.  True…

A:

Q: A psychology professor was curious how psychology majors fared economically compared to business…

A: The summary of statistics is, M =43000, s =12000, n =22 The null and alternative hypothesis is, The…

Q: e amount time (in seconds) it takes to write a full na erence = writing hand – non-writing hand) for…

A: Paired test is used when the data follows : normality two sample sizes are same and tested the same…

Q: What is NOT correct about a Type 1 error? What is NOT correct about a Type 1 error? a.It is when…

A: Type I error is a probability of rejection

Q: In a clinical trial, 21 out of 650 patients taking a prescription drug complained of flulike…

A:

Q: A study was undertaken with 24 randomly selected male subjects who were to undergo such surgery. The…

A: It is required to identify the correct alternative hypothesis, based on the given null hypothesis…

Q: What decision should the researcher make based on the results of the hypothesis test

A: Test is that whether or not the proportion of high school athletes who go on to play sports in…

Q: A study was conducted simultaneously in two different communities in New York City to examine an…

A: p-value: A p-value is used to measure the probability to obtain the results and the assumption was…

Q: Online dating sites and mobile dating apps have become more popular over the years for American…

A:

Q: For an ANOVA comparing three treatment conditions, what is stated by the null hypothesis (HO)?…

A: The given information is about an ANOVA comparing three treatment conditions.

Q: Step 1. State hypotheses and alpha level.     Step 2. Locate critical region.     Step 3.…

A: The sample size for male officer is 35, sample mean is 10.57, and SS is 901.34. The sample size for…

Q: QUESTION 4 An executive believes that no more than 80% of the company's employees take all of their…

A: From the above data  We are given that  P value = 0.0422 Level of significance =0.05

Q: An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 800…

A: It is known that if the p-value is less than the level of significance, the null hypothesis is…

Q: Does the overall alpha level change if you use a one-tailed test vs. a two tailed test? why or why…

A: Yes. The overall alpha level changes if compared to one-test verses a two tailed test. The alpha…

Q: What is a research question for the following scenario? What would the independent variable (IV) be…

A: Given information: The investigator is specially interested to test whether there is any difference…

Q: 6.24 Sleep deprivation, CA vs. OR, Part II. Exercise 6.22 provides data on sleep deprivation rates…

A: a). From the provided information, the proportion (p̂1) of California residents who reported…

Q: Researchers investigate how the presence of cell phones influence the quality of human interaction.…

A: Given information: Researchers are interested to study the effect of the cell phones quality of…

Q: is the P-Value of 0.1325 is greater than the alpha level? 2.  is there evidence that there is an…

A: For the given data, the chi-square test for the association is appropriate. H0​: There is no…

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.