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1. In the following examples, indicate whether you would perform a t test of independent means or dependent means.
a. Two groups were exposed to different treatment levels for ankle sprains. Which treatment was most effective?
b. A researcher in nursing wanted to know if the recovery of patients was quicker when some received additional in-home care whereas when others received the standard amount.
c. A group of adolescent boys was offered interpersonal skills counseling and then tested in September and May to see if there was any impact on family harmony.
d. One group of adult men was given instructions in reducing their high blood pressure whereas another was not given any instructions.
e. One group of men was provided access to an exercise program and tested two times over a 6-month period for heart health.
What statistical method is used to accept or reject the null hypothesis in determining if outsourcing is always beneficial? Please explain your reasons for choosing the selected method in detail and cite references (if any).
A sample of 40 observations is selected from one somewhat normal population. The sample mean is 102 and the sample standard deviation is 5.
Using the empirical rule, what is the approx percentage of cans of regular coke with weights between 0.80931 lbs. and 0.82433 lbs?
Test hypothesis that calories of two populations are equal. Illustrate all steps of the hypothesis testing process. Points will be deducted for missing parts.
Determine whether the coefficient of correlation in the population is zero. Construct and interpret confidence intervals and prediction intervals for the dependent variable, number of units sold.
Use Gauss-Jordan method to determine solution to following system of equations?
We want to determine if the proportion of people in the population who believes this is less than 0.75. What is the p-value?
Philadelphia is conducting a study on the characteristics of tourists who drive to Eagles football games. Previous studies indicate that approximately 70% of all game attendees are people who decided to drive from out of town
The sample proportion of large gloves for each location is and . (Round your answers to 4 decimal places.)
Computing relative frequencies in a contingency table and a survey of a sample of 347 people is conducted. The survey's respondents are classified according to their political affiliation and their opinion on a bill.
Independent random samples were taken from normal distributions of the yearly production of ships built by the International Ship Building Company under (1) a fixed-position layout and (2) a project layout.
Mean of $32,000 and a standad deviation of $3000. If 100 teachers are randomly selected, find the probability that their mean salary is greater than $32,500.
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