5) Suppose that you want to understand whether athletes who are older than 80 years of age would have higher memory level if they sleep one more hour.What experimental research design should you take? Why did you choose the one over another? Discuss

Q: 2) A recent online poll posed the question "Should female athletes be paid the same as men for the…

A: Answer: Yes. We can trust the result.

Q: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study…

A: Ans:

Q: (1).           % of men in this study received only Vitamin E and developed prostate cancer. (2).…

A: Given:     No Prostate Cancer Prostate cancer Total Selenium 8177 575 8752 Vitamin E 8117…

Q: Suppose that 80% of 3–4-year-old children and 70% of 5–8-year-old children in a village are…

A: Given that: age  QIV group Control group 3-4 3.78% 5.69% 5-8 1.70% 5.15%

Q: A cohort study was conducted over five years among 200 trial attorneys and general practice…

A: To express the magnitude of association between the lawers exposed to heart disease and not exposed…

Q: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study…

A: Formula : df_between-groups = k-1 df_within-groups = N-k

Q: 2. A study found that 60 percent of college students say they are housing insecure, while 18 percent…

A: Given

Q: 9. If there are equal number of individuals between two populations and an equal number of…

A:

Q: owns and working-from-home, which made collecting data on unemployment more challenging. Researchers…

A: Sample Size n 1000 Population Proportion p 5% Sample proportion p^ 60 q 1-p 95%   Null…

Q: 2. According to the Centers for Disease Control, the leading causes of death in the United States in…

A: Given:   Sr. No. Observed Frequency (O) Expected proportion (P) 1 79 24% 2 65 23% 3 14 7%…

Q: Is it reasonable to conclude that the rat with the supplement is smarter than the vast majority of…

A: From part (a), we can see that the probability is approximately 2.28% which is extremely low. From…

Q: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study…

A: GIven, The data set is: X1 X2 X3 14 25 45 28 22 33 27 17 30 31 14 41   K = 3…

Q: Suppose that 3000 drivers in Wakanda were randomly breath-tested on 21 April 2019 and 116 were above…

A: Solution : Given that : before the proprtion was = 116 /3000 = 0.0387and after a month the proprtion…

Q: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study…

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

Q: TABLE 10.2 A course can be taken for credit either by attending lecture sessions at fixed times and…

A: INTRODUCTIONIn this problem we have to find the average grade for statements who take the course…

Q: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study…

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

Q: Could owning a cat as a child be related to mental illness later in life? Toxoplasmosis is a disease…

A: Given : x1 = 136x2 = 220n1 = 262n2 = 522

Q: of workers who reported various symptoms, along with the shift (morning,  evening,  or night) that…

A:

Q: Of the 30 newly accepted juveniles into juvenile hall, half were placed in the regular program and…

A: Let μ1 denotes the population mean for group 1, and μ2 denotes the population mean for group 2. The…

Q: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study…

A: Introduction ANOVA is splitting up of total variance into variance due to several factors and…

Q: 3. In some tests of healthy, elderly men, a new drug has restored their memories almost to he level…

A: The given data set for the age group is: 20s (A) 65-70(with ampakine) (B) 11 1 7 9…

Q: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study…

A: Given:   Sr. No. x1 x2 x3 1 14 25 45 2 28 22 33 3 27 17 30 4 31 14 41

Q: Any athlete who fails the Enormous State University's women's soccer fitness test is automatically…

A: There are two scenario: 52% of athletes fit enough to play on the team would fail the soccer test,…

Q: 4) Without using the 10th students data and according to your opinion (do not make any calculations)…

A: For a small data set, one can make a idea about the mean of the data by just looking at the data…

Q: Any athlete who fails the Enormous State University's women's soccer fitness test is automatically…

A:

Q: Suppose a professional basketball player historically makes 39% of his three-point field goals.…

A: In this case, a test is required to see whether three-point goal shooting has improved. Here, the…

Q: a study is conducted to access the impact of caffeine consumption, smoking, alcohol consumption, and…

A: Given data, p=40%=0.4 n=8 Let X be event that they consume caffiene and smoke. P(X<=6)=?

Q: 30​% of adults in a certain country think that their taxes will be audited. In a random sample of…

A: We have given that  Sample size n = 1200 Sample proportion p^= 0.26 Population proportion p= 0.30…

Q: For a telephone survey, a marketing research group needs to contact at least 600 wives, 480…

A:

Q: When asked, "How much time will you require to complete this task?"cognitive theory posits that…

A: Given: A group of students are being surveyed about the estimated time to read a certain number of…

Q: Any athlete who fails the Enormous State University's women's soccer fitness test is automatically…

A: Consider the event that an athlete was fit enough to play to be A and the event that the athlete…

Q: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study…

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

Q: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study…

A: We use F distribution table to find the critical value.

Q: Any athlete who fails the Enormous State University's women's soccer fitness test is automatically…

A: Let's assume,  F = athlete fit enough to play F'= athlete is unfit. P = athlete passes the test…

Q: Of the 30 newly accepted juveniles into juvenile hall, half were placed in the regular program and…

A: Null Hypothesis H0: u1 - u2 = 0, where u1 is the mean of first population and u2 the mean of the…

Q: A client wants to determine whether there is a significant difference in the time required to…

A: The given table represents the time (in hours) required for each of 18 evaluators to conduct a…

Q: 2. A leading researcher in the study of interstate highway accidents proposes that a major cause of…

A: Given that: Sample size, n = 50 The data are presented in the following table: 56.1 57.0…

Q: A researcher investigated the association between fundamentalism and views on teaching sex education…

A: Given information: The SPSS output for chi-square test for independence is given.

Q: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study…

A:

Q: If the data is IQ test scores, an individual with a negative z-score what IQ level would he have? 2

A: Here the z-score is negative. So individual will have low IQ.

Q: 2. A calibration study needs to be conducted to see if the readings on 15 test machines are giving…

A: As given, a calibration study needs to be conducted to see if the readings on 15 test machines are…

Q: 1. XYZ Cable corporation employs 2,500 people. If a random sample of 165 is taken from the entire…

A: We answer up to three subparts of a problem. Thus, we'll be answering the first three sub parts.…

Q: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study…

A:

Q: The University is considering changing the email system that they currently use. Since there are…

A: Formula   Test statistic

Q: Any athlete who fails the Enormous State University's women's soccer fitness test is automatically…

A: Given information: PFit=0.39PUnfit=1-PFit=1-0.39=0.61 PFailFit=0.50PPassFit=1-0.50=0.50…

Q: During the Covid crisis, there were lockdowns and working-from-home, which made collecting data on…

A: The sample and population follows the normal distribution and the sample size is small, then t test…

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A:

Q: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study…

A: Given: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted…

Q: A report in LTO stated that the average age of taxis in the Philippines is 9 years. An operations…

A: If the value of n is greater than 30, then we call it a large sample test. In a large sample, we use…