Your company uses a pre-employment test to screen applicants for the job of repairman. The test is passed by 60% of the applicants. Among those who pass the test 80% complete training successfully. In an experiment, a random sample of applicants who do not pass the test is also employed. Training is successfully completed by only 50% of this group. If no pre-employment test is used, what percentage of applicants would you expect to complete training successfully?

Q: A crossover trial is a type of experiment used to compare two drugs. Subjects take one drug for a…

A:

Q: A dietician has developed a new diet which is claimed to reduce LDL cholesterol levels for those who…

A: given data, a dietician has devolped a new diet which is claimed to reduced LDL cholestrol  levels…

Q: You are studying the effect of exposure to color on mental dexterity. From a group of 37, 18 are…

A: Given data: Sample size (n) = 37 Only  one group  is given To find: What are the degrees of freedom…

Q: A college finds that 12% of students have taken a distance learning class, 24% of students are…

A: Given information Percentage of students taking distance learning class = 12% Percentage of…

Q: How do customers first hear about a new product? A random sample of 200 users of a new product was…

A: Introduction An hypothesis is an assumption that is being tested.

Q: Twenty-two subjects are tested, given a training session, and then retested. What test do you…

A: Dependent samples: If the sample values from one population are associated or matched with the…

Q: You want to see if violent videos games have any effect on aggression for middle school boys. So,…

A: To find: What kind of hypothesis test do you think would be appropriate for this study?

Q: In a study assessing helping behavior among college students on their way to class, you recruit 10…

A: There are three treatments 1. Students whom its said that they are late for class and need to rush.…

Q: Cholera, a serious intestinal disease, broke out in London in the mid-19th century. Research by a…

A: Given that,   Infected Not Infected Vaccinated 3 276 Not Vaccinated 66 473

Q: Do people feel hungrier after sampling a healthy snack?  Researchers randomly assign volunteers into…

A: Using SPSS: Type data in to SPSS: To run a One-Way ANOVA in SPSS, click Analyze > Compare Means…

Q: At Westgate Community College, a survey was done to determine when students are available for class.…

A: It is given that out of total students, 52 would take early-morning classes, 85 would take…

Q: Running heart rate - Jose is a physician who is researching to what extent running affects heart…

A: One sample proportion test: One sample proportion test is used to compare the proportion of values…

Q: In a study researching how donating to charity can affect a person's happiness, 96 participants were…

A: The objective of the question is to identify the correct null and alternative hypotheses for a study…

Q: don't believe her. You decide to check this out on your own. You randomly survey 64 of her past…

A: Given that  x=33n=64 p^=xn=3364=0.5156 confidence level=95% z critical value for 95% confidence…

Q: Phineas Phillips, from Philadelphia, has a fascination with fun phone facts. But Phineas has…

A:

Q: Depression is a serious mental disorder that has been shown to respond very well to cognitive…

A: Introduction: An independent variable in a study is a variable that has the potential to affect and…

Q: A teacher is interested in the effect of a study session on quiz performance. Two different classes…

A: Mean : A data set's mean (average) is calculated by summing all of range|the amount|the quantity}s…

Q: cher claims that 60% of students who take her class feel more enriched after completing it. It turns…

A: given data,  claims that 60% of students who take her class feel more enriched after completing…

Q: A psychologist conducted a survey of the attitude towards the sustainability of American energy…

A: Attitude Observe Value (280×2nd survey) Expected Value (280×1st survey)…

Q: Caleb designed an experiment to investigate whether listening to music or chewing gum affects the…

A: The objective of the question is to identify the response variable in the experiment and determine…

Q: In a study assessing helping behavior among college students on their way to class, you recruit 10…

A: Given that a sample of 10 students is considered.  There are three treatments 1. Students whom its…

Q: You wish to find evidence that a particular type of team building seminar can improve your…

A: It was stated that I wish to find evidence that a particular type of team building seminar can…

Q: Close Confidants and Social Networking SitesA previous exercise introduced a study in which 2006…

A:

Q: Depression is a serious mental disorder that has been shown to respond very well to cognitive…

A: The following are the scores for the sample: 4, 3, 6, 2, 4, 6, 7, 5, 2, 1, 8, 9, 7, 4, and 10 The…

Q: An experimenter investigated the effects of blue light exposure on people’s sleep quality.…

A: In the given research problem, there are two independent samples- Blue light and No Blue light. The…

Q: In a study assessing helping behavior among college students on their way to class, you recruit 10…

A: SolutionStep 1:The given study assessing the helping behaviour among college students. Here, the 10…

Q: A box contains 70% of tickets labeled 1 and 30% of tickets labeled 0. We draw 500 times with…

A: Given that   A box contains 70% of tickets labeled 1 and 30% of tickets labeled 0.   We draw 500…

Q: Neighborhood 3 1 4 With campaign Without campaign 4.0 3.2 2.5 5.0 2.8 4.0 3.8 4.4 4.3 4.0 Is the…

A: With Without D (D-Dbar)^2 4 4 0 0.36 3.2 3.8 -0.6 0 2.5 4.4 -1.9 1.69 5 4.3 0.7 1.69 2.8 4…

Q: Researcher Olivia wants to study the relationship between regular exercise and health outcomes…

A: From the given information we have to select the correct Option.

Q: Indicate whether the study described is an observational study or a controlled experiment. A group…

A: Observational Study:  We measure or survey members of a sample without attempting to influence them…

Q: A bands name is generally recognized by 10% of college students. The band promotes itself heavily on…

A:

Q: Can You Tell a Story About Your Parents? In a study, young adults in the US were asked to recall a…

A: (a) If the standard error for the distribution is 0.015, find a 95% confidence interval for the…

Q: Please give correct answer ASAP Example 5: A local college is interested in knowing if the…

A:

Q: e-Books A study by the Pew Internet & American LifeProject found that 78% of U.S. residents over…

A:

Q: An anger-management course claims that, after completing its seminar, participants will lose their…

A: From the provided information, Sample size (n) = 12 Level of significance (α) = 0.02

Q: In a study assessing helping behavior among college students on their way to class, you recruit 10…

A: Given that a sample of 10 students is considered. There are three treatments1. Students whom its…

Q: Many fundraisers ask for donations using email and text messages. A paper describes an experiment to…

A: Let p1 be the proportion who make a donation after receiving an email, and p2 be the proportion who…

Q: A crossover trail is a type of experiment used to compare two drugs. Subjects take one drug for a…

A: Introduction: Denote μ1, μ2 as the true mean pain levels experienced after taking Drugs A and B,…

Q: Researchers want to investigate whether taking aspirin regularly reduces the risk of heart attack.…

A: Population :  Population is men aged 50 to 84. Sample :  Sample is 400 men who participants.…

Q: People with headaches are randomly divided into two groups. One group gets pain medication, and the…

A: Determine whether the study given scenario represents observational study or an experimental study.…

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.