Question

1. Write the corresponding letter of the distribution used to conduct the test to answer the question or to find the probability requested in the blank to the left of the given information. You will only use each letter once.
a. Student’s T
b. Standard Normal
c. Chi-Square
d. Binomial
e. Poisson
_________________Suppose that a doctor claims that 17 year olds have an average body temperature that is warmer than the commonly accepted average human temperature of µ = 98.6 degrees Fahrenheit. The distribution of body temperatures is approximately normal with a population standard deviation of 0.6 degrees Farenheit. A simple random sample of 49 people, each of age 17, is selected to test if the doctor’s claim is true. The mean temperature in the sample is 99.6 degrees Fahrenheit.
_________________It is assumed that the mean systolic blood pressure is μ = 120 mm Hg in the general population and the distribution of the measure is approximately normal. In the Honolulu Heart Study, a sample of n = 15 people had an average of 130 mm Hg with a standard deviation of 4 mm Hg. Is the group in the study significantly different from the general population?
_________________Finding the probability of more than 5 heads when flipping a coin 12 times.
_________________Finding the probability of more than 5 trains arriving at a station, given an average of 10 arrivals per hour.
_________________ “Offshoring” is a term that describes a company’s practice of relocating jobs and/or production to another country to reduce labor costs. Research was published on the phenomenon of offshoring and how prevalent it is worldwide. The article included the results from a recent survey of CEOs at U.S. firms, where each CEO was asked which of 4 categories described his or her firm’s position on offshoring. Researchers want to determine if the proportion of CEOs differ between the 4 categories.
_________________ Researchers want to study the effect of a new drug on reducing cholesterol levels. A sample of 500 individuals with high cholesterol were randomly assigned to one of two groups (placebo, drug). The distribution of the change in cholesterol levels within each group are approximately normally distributed. The researchers want to test to see if the mean change in cholesterol level differs between the placebo group and drug group.

Answer 1