Statistics

In a clinical trial of a vaccine, 10,000 children were randomly divided into two groups.

H0 : p1 = p2 versus H1 : p1 ≠ p2 B.    H0 : p1 = p2 versus H1 : p1 < p2 C.    H0 : p1 = p2 versus H1 : p1 > p2 D.   H0 : p1 = 0 versus H1 : p1 < 0 Determine the test statistic. z0  =(Round to two decimal places […]

Construct a confidence interval for p1 p2 at the given level of confidence.
Which one is not included in the category of longitudinal research design?

Which one is not included in the category of longitudinal research design?  a. Repeated cross-sectional design (trend study) b. Fixed-sample panel design c. Event or cohort-based design d. Cross-sectional research design

A population with m = 85 and = 12 is transformed into z-scores. After the transformation, what are the values for the mean and standard deviation for…

A population with m = 85 and  σ

Using the Anger Expression Index from the Angry Moods study as the dependent variable, perform a 2×2 ANOVA with gender and sports Participation as…

Using the Anger Expression Index from the Angry Moods study as the dependent variable, perform a 2×2 ANOVA with gender and sports Participation as the two factors. Do athletes and non-athletes differ significantly in how much anger they express? Do the genders differ significantly in Anger Expression Index? Is the effect of sports participation significantly […]

Case study Questions: Compute descriptive statistics, and prepare tables and/or graphs, for all the variables in the data set. Comments on the…

Case study Questions: 1.     Compute descriptive statistics, and prepare tables and/or graphs, for all the variables in the data set. Comments on the results.

In a random sample of 45 refrigerators, the mean repair cost was $ 1 4 0 . 0 0 and the population standard deviation is $15. Construct a 90%…

In a random sample of 45 refrigerators,

How can you avoid errors when calculating for variance and standard deviation of discrete distribution?

How can you avoid errors when calculating for variance and standard deviation of discrete distribution?

a study 200 nurses found that of 125 females nurses, 56 had bachelor’s degree; and of 75 male nurses; 34 had bachelor degrees.

a study 200 nurses found that of 125 females nurses, 56 had bachelor’s degree; and of 75 male nurses; 34 had bachelor degrees. if a nurse is selected at random, find the probability that the nurse is a female nurse with a bachelor degree

A random sample of 174 college students was asked to indicate the number of hours per week that they surf the internet for either personal

A random sample of 174 college students was asked to indicate the number of hours per week that they surf the internet for either personal information or material for a class assignment. The sample mean response was 6.06 hours and the sample standard deviation was 1.43 hours. Based on these results a confidence interval extending […]

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