An article in the San Jose Mercury News stated that students in the California state university system take 4.5 years, on average, to finish their undergraduate degrees. Suppose you believe that the mean time is longer. You conduct a survey of 43 students and obtain a sample mean of 5.1 with a sample standard deviation of 1.2. Do the data support your claim at the 1% level? Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) a. State the null and alternative hypotheses b. In words, state what your random variable X represents. c. State the distribution to use for the test. (enter your answer in the form z or tdf)
An article in the San Jose Mercury News stated that students in the California state university system take 4.5 years, on average, to finish their undergraduate degrees. Suppose you believe that the mean time is longer. You conduct a survey of 43 students and obtain a sample mean of 5.1 with a sample standard deviation of 1.2. Do the data support your claim at the 1% level?
Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is
a. State the null and alternative hypotheses
b. In words, state what your random variable X represents.
c. State the distribution to use for the test. (enter your answer in the form z or tdf)
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
