Q1)
According to the results of the Student Data Survey, the mean age of the students in our class is 18.9 years with s = 1.4 years. The distribution is approximately normally distributed.
If one student is chosen at random from this distribution, find the following probabilities. Show your work and round answers to four decimal places.
a. P(younger than 20)
b. P(older than 21)
c. P(between 18 and 20)
Q2)
The attached file contains information regarding the current 100 US Senators. Please use this data to answer the following questions.
a. Select a random sample of 10 Senators from the list. Please explain how you obtained the sample and ensured that it was random. For each Senator you choose, list all the information given in the table for that Senator.
b. Who are the 10 Senators that you chose for your sample?
c. For your sample of 10 Senators, what is the mean age?
d. For your sample of 10 Senators, what is the mean number of years of service?
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