A researcher wants to determine if eating blackberries can help reduce the number and severity of sore throats. Ten people have volunteered to take part in a pilot study and it is your job to randomly assign them to a control or treatment group by flipping an imaginary coin. Try to behave like a coin and pretend to flip your mental coin for each volunteer – with an imaginary heads, assign the subject to the control group – with an imaginary tails, assign the subject to the treatment group. Use “T” for treatment group and “C” for control group. You can state […]

In a survey of men in the United States (ages 20 to 29), the mean height was 69.9 inches with a standard deviation of 3.0 inches. Assume the height data is normally distributed. Zak’s height has a z-score of -1.7. Which one of the following statements is true?  Zak is shorter than 65 inches.  Zak’s height is in the lower 2.5% of men’s heights (ages 20 to 29).  Zak is taller than 72.9 inches.

We created a probability distribution with data from a survey of 1200 college students. The variable is the student’s perception of his or her body weight. What is the probability that a randomly selected student does not feel their body weight is “about right?”  0.7125  0.1958  0.2875

To what does the term internal validity refer? a. the degree to which results of a study can be generalized from one sample to another b. the process of subject selection c. the development of a treatment d. the degree to which the results of a study can be attributed to the manipulation of the independent variable

Process Costing Accounting