1)

A meteorologist stated that the average temperature during July in Chattanooga was 80 degrees. A sample of July temperatures over a 32-year period was taken. The correct set of hypotheses is _____.

Select one:

a.H₀: 80H_a:> 80

b.H₀:H_a: 80

c.H₀:=80H_a:80

d.H₀: 80H_a:= 80

2)

When a true null hypothesis is rejected, the researcher has made a _______.

Select one:

a.Type II error

b.powerful error

c.Type I error

d.sampling error