The weights in ounces of a sample of running shoes for men and women are shown. If we want to test the claim that the means are different at 1% level of significance, what is the decision and conclusion of the test?

Q: In a sample of 550 students, 80% prefer online resources versus printed materials. The standard…

A:

Q: suppose you want to estimate the proportion of those who passed the subject (grade ≥ 75). How large…

A: Given:Relative error=10%Risk factor=15%Find:Sample size?

Q: When comparing two population mean, failing to reject H, means that the two population means are…

A: It is given that H0 is not rejected.

Q: Suppose 4 percent of the children in the US are thought to be near the juvenile diabetes threshold.…

A:

Q: For the independent-measures t statistic, what is the effect of increasing the sample variances?

A: If there is more variance in the sample data , then the difference between the mean of data and data…

Q: For a repeated-measures ANOVA, if SSwithin treatments = 86, SSbetween treatments = 80, SSbetween…

A: F-Ratio = MSbetween treatmentsError

Q: Compare the means of each group (ASPD and no ASPD). What can you say about the narcissism scores of…

A: Given information: The output of descriptive statistics is given.

Q: The executives at Sandbachian, inc., having recently solved their widget crisis, have another…

A: Let ‘x’ be the no of defective manhole covers i.e x=40 and n=800 sample propotion (P)=x/n p=40/800…

Q: Suppose a researcher wants to estimate the population proportion of defective light bulbs. He took a…

A:

Q: One sample has n = 6 and M = 10. A second sample has n = 4 scores with M = 15. If the two samples…

A: Combined mean = n1x1¯+n2x2¯n1+n2

Q: In a study to estimate the proportion of smokers among the residents in a certain city and its…

A: To testH0:p1=p2H1:p1≠p2

Q: Does this statement make sense or not? our study measured the birth weights and incidents of…

A: Here we want to Know that the given statement make sense or not.

Q: You are running a political campaign and wish to estimate, with 95% confidence, the proportion of…

A: Formula for the sample size needed to estimate a population proportion is

Q: what is the 95th percentile in the t-distribution if the sample size is 25?

A: Given Information: n=25Type of distribution=t distributionTo calculate=95th percentile

Q: You take a random sample of size 25 students and find the 5 who understand this lecture. With 99%…

A:

Q: The z for a sample mean hypothesis test compares a sample mean to another mean. In these situations,…

A: From the above data We are given that the The z for a sample mean hypothesis test compares a…

Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35…

A:

Q: Explain the Formulas for a sample comparable to the ones for a population?

A: If the data includes all the possible values, then it is called population. Whereas, the sample data…

Q: We need first to determine the degrees of freedom before we could calculate the sample mean True…

A: The sample mean is defined as Mean = Sum of sample observations/Sample size

Q: 2. Use the first 30 data values in Table 1. Test, at the 5 percent level of significance, the…

A: For mean cholesterol, The hypothesis to be tested is- H0:μmen=μwomen H1: μmen≠μwomen This is a…

Q: The herpetologist ends up rejecting the null hypothesis. If the actual proportion of ridged…

A: The herpetologist ends up rejecting the null hypothesis. If the actual proportion of ridged…

Q: It is thought that 12% of all students taking a particular course received a grade of A. In a sample…

A:

Q: What happens to the sample size when you don’t know a prior sample proportion?

A: To calculate the sample size when we do not know prior sample proportion.

Q: A simple random sample of 28 observations was taken from a large population. The sample mean equaled…

A: It is given that, a simple random sample of 28 observations was taken from a large population with…

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: From the given information, confidence level is 0.96, p=0.54 and E=0.02.

Q: If you choose to work with a t-score, how many degrees of freedom would you have?

A: Here given  Sample mean = 87 Sample size = n = 25

Q: A population of N = 6 scores has ΣX = 42. What is the population mean?

A: Given ,Population of N=6 scoresand Σx =42

Q: a researcher peformed the Mann-Whitney test and found a significant difference between psychologists…

A: Since, the population standard deviation known. Therefore, the value of z should be taken from…

Q: In the study conducted by selecting 100 female and 100 male students in order to test the claim that…

A: given that  p- value=0.0228

Q: Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high…

A: From the provided information, Sample size (n) =750 and p0 = 0.54

Q: You have been hired by a consortium of local car dealers to conduct a survey about the purchases of…

A: Given: Confidence level = 95% Margin of error = 0.03 Formula Used: n = ZαMargin of error2 p(1-p)

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: The proportion is p0=0.52 The total number of samples n=700 The value of…

Q: Are freshmen psychology majors more likely to change their major before they graduate compared to…

A: Given Information :   344 of the 618 freshmen psychology majors from a recent study changed their…

Q: What is the average IQ of these subjects?

A:

Q: The executives at Sandbachian, Inc., has recently solved their widget crisis, have another problem…

A:

Q: What will happen to the sample size if the percentage error becomes lower? Can you explain to me how…

A: From the given information we want to find solution.

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: The value of p0 is 0.52 and the sample size n is 800.

Q: In a paired samples t test, explain the logic of difference scores (why do you need to find them to…

A: Paired t test:The paired t test is also defined as dependent- t test. It is used to test the mean…

Q: Suppose that an anxiety measure has a mean of 106 and SD of 20. The researcher only wants to work…

A:

Q: In a repeated measures design the difference scores are used in the analysis, not the raw scores.…

A:

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: Given : n = 700 p = 0.52

Q: A recent study showed that the cost of buying a typical shopping basket of 40 food items for…

A: Given data is 8100,6600,6150,5100,4900Arrange the data in ascending…

Q: A researcher uses a repeated-measures design to compare individuals’ performance before treatment…

A:

Q: The manager of a small supermarket chain wants to estimate the proportion of time stockclerks spend…

A: Assume that the population proportion is 0.5. It is known that the critical value for 98% confidence…

Q: A researcher reports an F ratio = (5, 9), repeated-measures ANOVA, how many treatments were compared…

A: A researcher reports an F-ratio with df=5,9 from a repeated-measures ANOVA.  Let there are k…

Q: In a class of 31 students, how many would be above the third quartile?

A: From the above data  Sample size n=31 How  many would be above the third quartile?

Q: Because of the popularity of movies as an entertainment medium for college students, you plan to do…

A: Solution: Given information: Population standard deviation= σ= $0.50   Margin of error = E= $0.25…

Q: The Nero Match Company sells matchboxes that are supposed to have an average of 40 matches per box,…

A: From the given information,   Here, the sample mean, x-bar is 42.8. Population mean, µ is 40.…