or an independent sample t-test, what is the numerator of the t-test equation or the comparison/difference that we care about? 1)The difference between our 2 groups or conditions (which consist of different individuals) 2) The difference between our sample mean and the population mean 3)The difference between our sample of difference scores and 0. 4)The difference between our 2 groups or conditions (which consist of matched pairs or the same individuals)

Q: An HR specialist wants to know, if the employees at the company he works for, work on average more…

A:

Q: If the standard error of the mean is 10 for n = 100, what must the sample size be to reduce the…

A: Standard error of the mean=E1=10And Sample size n1=100Standard error=E2=5

Q: How can you identify different steps of testing of hypothesis for population variance

A: Following are steps of testing of hypothesis for population Variance : Step-i : Verify the…

Q: The given frequency distribution is incorrectly constructed. State the reasons why they are wrong.

A:

Q: How do I interpret the mean of 12.5 and median of 12.5 with no repeating so there is no mode? How…

A: Given that  Mean = 12.5  Median = 12.5

Q: Discuss the advantage of the independent sample test compared with the advantage of the one sample…

A: In hypothesis testing we test the hypothesis regarding the population parameter.

Q: Discuss how to identify dependent and independent samples and present examples in your discussion.…

A: Dependent samples will have paired observations the two samples are related to each other and…

Q: Do wearable devices that monitor diet and physical activity help people lose weight? Researchers had…

A:

Q: How to calculate the sample correlation and covariance

A: Covariance and correlation are used to measure the linear relationship between two or more…

Q: illustrates the effect of the standard deviation & the type of test (one-tailed or two) on the…

A: Given that, Power of a hypothesis test: The probability of not committing a Type II error is called…

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: From the provided information, Sample size (n) = 54 Out of which 35 involved an intoxicated driver.…

Q: Next, let's imagine that you want to examine whether the pattern of frequencies across the political…

A: We want to find the  value of Pearson's Chi- square test from the above given problem ?

Q: Explain the situations of independent samples t-test vs. paired-sample t-test?

A: Independent samples t-test vs. paired-sample t-test.

Q: what is the z score formula and and reverse z score formula ?

A:

Q: If we get a big difference between our sample mean and our population mean, will our test statistic…

A: Given information: The statement is given related to the big difference between x¯ and µ. Formula:…

Q: The National Football League (NFL) is an American sports league where 32 of the world's premier…

A: First lets's sort the data as 2,  2,  3,  3,  4,  4,  5,  6,  6,  6,  7,  7,  7,  7,  8,  8,  9,  9,…

Q: (a) What are the null hypothesis H. and the alternative hypothesis H, that should be used for μ the…

A: Null and alternative hypotheses: Null hypothesis: Null hypothesis is a statement which is tested for…

Q: A study of all 2093 employees of a company shows that 54% are satisfied with the company's health…

A: Definition  Statistic: Statistic may be defined as which one is based on the sample  Parameter:…

Q: Explain ways in which we use the independent sample t-test vs. paired sample t-test?

A: Independent sample t-test vs. paired sample t-test

Q: A hospital wishes to justify the benefits of nutrition programs for pregnant women using birth…

A: The data of 14 pregnant women was given in which 7 women were provided nutrition and 7 did not.They…

Q: What does it mean to have a positively or negatively skewed result to a research study? What are…

A: The Skewness of any distribution is the measure of symmetry of the distribution. It tells the…

Q: l ratings of the value of the course. For a sample of 25 courses, the following regression was…

A: Given :Regression model :ŷ = 42.97 + 0.38x1 + 0.52x2 - 0.08x3 + 6.21x4Sample size n=25k(independent…

Q: 2) In a study on the average commute times for two different routes to work, you collected the…

A: Here,the sample size n= 15Significance level α=0.10Claim : there is a significant difference in the…

Q: The null and alternative hypotheses would be:          Select an answer p1 μ1  Select an answer ≠  =…

A: It is claimed that, freshmen psychology majors more likely to change their major before they…

Q: Generate two set of data of at least with ten data points using any scenario of your choice, Using…

A: The data is: Data Set 1 Data Set 2 0.319691 0.721655 0.134176 0.430515 0.900752 0.225351…

Q: 1) N= {16, 21, 17, 25, 22, 18, 21, 16, 13, 21}. Please use the data set N and calculate a) The Mean,…

A:

Q: Why is the standard error used for hypothesis tests for the difference between two population…

A: Introduction: Denote p1, p2 as the true unknown population proportions of the two populations of…

Q: Discuss all possible factors that would affect the validity of test scores

A: A test score is the value of the test statistic when the values of the parameter are put.

Q: Why is the unbiased estimator of variance used?

A: the unbiased estimator of the population variance, corrects the tendency of the sample variance to…

Q: 3) What is the median for these data? 4) What is the first quartile? 5) What conclusion can you…

A: Solution: Given data: 118, 119, 97, 84, 90, 111, 120, 127, 89, 94, 120, 119, 133, 135, 114, 119 To…

Q: y, or Kruskal-Wa

A: Above all given option are non parametric test hence answer must be non parametric test  The Mann-…

Q: use a sample to draw an inference about a population

A: The population is a set of all the possible observations about a specified characteristic of…

Q: Suppose that you want to test the mean of two populations whose variance is known. Your sample size…

A: Variance is known  Test statistic = 2.65

Q: For an analysis of variance, "two-way" refers to the direction that traffic should follow on the…

A: In this case, we need to identify the correct option for the given statement.

Q: What are the variables, what scale of measurement is each variable (nominal,ordinal,or continuous).…

A: The high school teacher was interested in whether there is a gender difference in terms of the…

Q: Show the difference between two approaches to significance testing?

A: The two approaches to significance testing are p-value approach and critical value approach.

Q: Professors collected data consisting of eye color and gender of statistics students. Among 888 male…

A: From the provided information,

Q: Why do you need to know the sampling distribution of the difference between two sample means in…

A: In this case, we need to find the reason for identifying the sampling distribution of the difference…

Q: explain why two parameters are used in a two sample test

A: Here in the two parameters we take in two sample t-test because, we take samples from two…

Q: Absenteeism can be a serious employment problem.  It is estimated that absenteeism reduces potential…

A: Given information: The data represents the values of the variables Wage, Pct PT, Pct U, Av Shift,…

Q: A physician is interested to determine if the mean length of waiting time to conceive (in months) of…

A: Independent samples: Two samples are said to be independent when observations in one sample do not…

Q: A study of teenage suicide included a sample of 123 girls and 96 boys between ages of 12 and 16…

A: From the provided information, Total girls = 123 Total boys = 96

Q: 7. If we change the significance level from 5% to 1% how will that change affect the pvalue for the…

A: P value is probability of getting extreme results than what is observed. *Suppose you are doing left…