10.)We want to test the claim that the proportion of plane crashes due to pilot error is 46%. Use the given information to state conclusion about null hypothesis, and conclusion about the claim.

H0P=0.46

H1P0.46z=1.9Pvalue=0.057

Use =0.05 level of significance:

Pick the following:

a.

Fail _to reject_ or _reject_

b. There ___is_ or __is not_____significant evidence to

_______support___ or ____reject______

the claim that the proportion of plane crashes due to pilot error is 46%.

9.) In 1990, about 62% of adults believed that global warming is real. A researcher wanted to determine whether this proportion has changed. In a random sample of 762 adults 356 said they believe that global warming is real.

H0P=0.62

H1P0.62

a. Find the sample proportion.

0.467

b. Determine the test statistic, using the value found from part "a".