Author Question: The weight of an object, measured to the nearest gram, is an example of _____. a. a continuous ... (Read 51 times)

dbose · **on:** Jun 24, 2018

The weight of an object, measured to the nearest gram, is an example of _____.
a. a continuous random variable
b. a discrete random variable
c. either a continuous or a discrete random variable, depending on the weight of the object
d. either a continuous or a discrete random variable, depending on the units of measurement

Question 2

The average U.S. daily internet use at home is two hours and twenty minutes. A sample of 64 homes in Soddy-Daisy showed an average usage of two hours and 50 minutes with a standard deviation of 80 minutes. We are interested in determining whether or not the average usage in Soddy-Daisy is significantly different from the U.S. average.
a. State the null and alternative hypotheses to be tested.
b. Compute the test statistic.
c. The null hypothesis is to be tested using = .05 . Determine the critical value(s) for this test.
d. What do you conclude?

lgoldst9 · **Reply #1 on:** Jun 24, 2018

Answer to Question 1

b

Answer to Question 2

a. H0: = 140 minutes
Ha: 140 minutes
b. Test statistic t = 3
c. t.025 = 1.998 and -t.025 = -1.998
d. Reject H0 and conclude that the average usage in Soddy-Daisy is significantly different from the national average of 140 minutes.