vegetable gardens. A random sample? In the town of Springdale, 30% of the families p=.30 regularly plant vegetable gardens. A random sample of n=100 families is selected for a particular study. What is the probability that the sample proportion, the proportion of families who plant a vegetable garden, is between .20 and .40

a. .0146
b. .0292
c. .4854
d. .9708
e. None of the above.

The U.S Bureau of the census reported mean hourly earnings in the wholesale trade industry of u=9.70 per hour in 1987. A random sample of n=49 wholesale trade workers in a particular city showed a sample mean hourly wage of x=9.30 per hour with a standard deviation of s=1.05 per hour. Test to see if wage rates in the city differ significantly from the reported 9.70.
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