A researcher looks at the mean salaries of male and female electricians and decides based on the evidence that there is no difference between the two groups. Given that there was a failure to reject the null hypothesis, it is possible that a type II error was made. Given the type of error made in this situation, what could researchers do to reduce the risk of this error? Choose a .01 significance level, instead of a .05 significance level. Increase the sample size.

Q: (d) Decide whether to reject or fail to reject the null hypothesis. O A. Fail to reject H, because…

A: Option (D)

Q: In the US,  46.8% of all people have type O blood,  39.3% have type A blood, 10.4% have type B blood…

A: Given:   Outcome Observed frequency O 1685 A 1413 B 353 AB 133 Total 3584

Q: A graduate student believes that people consider faces with more contrast between eye color and skin…

A: Explanation for the first part: Given a null hypothesis H0, we either conclude that there is not…

Q: Small-business telephone users were surveyed 6 months after access to carriers other than Carrier A…

A:

Q: Suppose that in a random selection of 100 colored​ candies, 22​% of them are blue. The candy company…

A: sample size(n)=100 sample proportion(p^)=0.22 significance level(α)=0.01

Q: in a clinical trial of a drug intended to help people stop smoking, 126 subjects were treated with…

A: The power of the test, in this case, is 1—β= 0.95 (that is, the complement of β), indicates the…

Q: The accompanying table lists body temperatures (in F) obtained from randomly selected subjects.…

A: State the hypotheses   Let Factor A denotes the Gender. Let Factor B denotes the smoking.   Test for…

Q: Past studies have indicated that the percentage of smokers was estimated to be about 33%. Given the…

A:

Q: A study of seat belt users and nonusers yielded the randomly selected sample data summarized in the…

A: Answer: To calculate the value of chi-square test statistics.

Q: A college administrator wanted to know if the proportion of students who request online classes, lab…

A: Answer:  Given that, n=250 xn2=4.01 P-value = 0.1347 α=0.05

Q: Corona virus has affected different states differently in the U.S. In New York out of 142 ICU…

A: State the hypotheses.   Let p1 denotes the population proportion of deaths among ICU patients in the…

Q: A study of seat belt users and nonusers yielded the randomly selected sample data summarized in the…

A: Claim : The amount of smoking is independent of seat belt use. Hypothesis : H0 : The amount of…

Q: The Statistics Games are played by a large number of students across the county. Last year, 32% of…

A:

Q: A clinical psychologist studies the effects of tonsillectomy and adenoidectomy on aggressive…

A: It is provided that there are three groups for which the number of observations in each group are nA…

Q: In a random sample of​ males, it was found that 24 write with their left hands and 226 do not. In a…

A: State the hypotheses. Let p1 denotes the proportion rate of left handedness in males. Let p2 denotes…

Q: 1. does the data satisfy the assumptions of ANOVA? 2. Write the null and alternative hypothesis of…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: average, college freshmen spend 7.5 hours a week  going to parties. One administrator does not…

A: Given that  Sample size n =100 Sample mean =6.6 Standard deviation =9

Q: Determine whether the alternative hypothesis is supported at a 0.05 significance level.

A: From the obtained results, The test statistic is 13.20. The critical value is 1.64.

Q: Historically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A…

A: Given X=1723 n=2500

Q: A poll was conducted to investigate opinions about global warming. The respondents who answered yes…

A: The table for the responses of activity for global warming with male and female is,   Human…

Q: Historically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A…

A: Given,sample size(n)=2500no.of people favor of stricter gun control laws(x)=1723

Q: In a random sample of 315 people 90 of them were smokers. Based on the above sample test whether the…

A:

Q: The marketing manager of a large multinational corporation is concerned that some salespersons…

A: From the given information we conduct chi squared test for variance.

Q: In a clinical trial of a drug intended to help people stop​ smoking, 131 subjects were treated with…

A: Power of the test =0.96Level of significance=0.05

Q: A medical research team conducted a study to test the effect of a migraine drug. Of the 400 subjects…

A:

Q: A psychologist believes that the frequency that a person engages in sexual activity without a…

A: Chi square test is used to determine the independence of variables in the data set. There are four…

Q: est the hypothesis that the proportion of airplane accidents due to pilot error is not 0.51. Use a…

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

Q: UB40  offers limousine service from LAX to Pasadena. Iveren Donald Sean Lammers, CEO of the company,…

A: The given data is, I-5 I-134 52 59 67 60 56 61 45 51 70 56 54 63 64 57   65

Q: p-value for this hypothesis test?

A: here given ,  A recent study focused on the number of times men and women send a Twitter message in…

Q: A college administrator wanted to know if the proportion of students who request online classes, lab…

A: From the given information the p-value of 0.1347 and the level of significance is 0.05.

Q: Suppose 240 subjects are treated with a drug that is used to treat pain and 55 of them developed…

A: Suppose p is the true proportion of users who developed nausea.

Q: In the US,  44.5% of all people have type O blood,  39.3% have type A blood, 11.5% have type B blood…

A: Introduction: Denote p1, p2, p3, and p4 as the true proportions of millionaires with blood groups O,…

Q: he drug Ritalin is designed to stimulate the central nervous system. In a random sample of 252 boys…

A: Solution: Given information: n= 252 Sample size of boysx = 44 boys taking Ritalin p^= xn=44252=…

Q: A recent report from the Pew Research Center indicates that even teens think they have a problem…

A: For teenage girlssample size(n1)=365x1=171For  teenage boyssample size(n2)=378x2=132significance…

Q: In 2005, Health Canada claimed that 16.9% of Canadian adults are obese. A researcher wanted to check…

A: From  the given information,   α=0.07

Q: Samples of pages were randomly selected from three different novels. The Flesch Reading Ease scores…

A: The level of significance is 0.01.

Q: A kilo restaurant implemented a change in the composition and presentation of its dishes. We want to…

A:

Q: An assembly line will be shut down for maintenance if the defect rate exceeds 2.3%. Suppose you…

A: Given data: p =2.3 % = 0.023 Sample size = 200 Significance level = 5 % To find: For what values of…

Q: A kilo restaurant implemented a change in the composition and presentation of its dishes. We want to…

A: We have given thatMean(µ) = 640Sample size (n) = 10Sample mean (x̅) = 656sample Variance (s2) = 144…

Q: Kenneth, a competitor in cup stacking, claims that his average stacking time is 8.2 seconds. During…

A: Note:The given calculated values can be used to draw the conclusion.

Q: Suppose an instructor would like to know if there is difference in the performance of her two…

A: Let us consider two population with mean and and standard deviation and respectively. If sample…