??
? ??: ? = 50
Ha: ? > 50
To execute this hypothesis test we should use a:
T-Test
OZ-test
??
because:
o is known, but the sample size is less than 30
Oo is known and the population is normal
?? is unknown and the sample size is less than 30
X
There are 13
? degrees of freedom for this test.
The test statistic is: 2.375
(please round to two decimal places)
The p-value for this hypothesis test is: 2.16
places)
X (please round to four decimal
The conclusion for the hypothesis test is:
Since p> a we accept the null hypothesis
??
Since p? a we do not have enough evidence to reject the null hypothesis
Since p<a we fail to reject the null hypothesis
Since p<a we reject the null hypothesis and accept the alternative
Since p? a we reject the null hypothesis and accept the alternative
(c) Calculate a 95% confidence interval for the average gas mileage of a 2012 Prius by drivers who
participate on fueleconomy.gov.
We are
X% confident that the true population gas mileage of a 2012 Prius
by drivers who participate on fueleconomy.gov is between
X mpg. (please round to one decimal place)
X mpg and
