One Sample T-Test - Guided

Every road has one at some point - construction zones that have much lower speed limits. To see if drivers obey these lower speed limits, a police officer uses a radar gun to measure the speed (mph) of a random sample of 10 drivers in a 25 mph zone. Here is the data:

27 33 32 21 30 30 29 25 27 34

Is there convincing evidence that the average speed is of drivers in this zone is greater than the posted speed limit?

State the Ho and Ha.

Every road has one at some point - construction zones that have much lower speed limits. To see if drivers obey these lower speed limits, a police officer uses a radar gun to measure the speed (mph) of a random sample of 10 drivers in a 25 mph zone. Here is the data:

27 33 32 21 30 30 29 25 27 34

Is there convincing evidence that the average speed is of drivers in this zone is greater than the posted speed limit?

What is the p-value, rounded to three decimal places?

• .014

• .007

• .993

• 3.05

What can we determine from our p-value?

• Reject the Ho, there is convincing evidence that the average speed of drivers is greater than the speed limit.

• Failed to reject the Ho, there is not enough evidence to support the claim.

• .002

• .004

• .005

• .006

What can we determine from our p-value?

• Reject the Ho, there is convincing evidence to support the claim.

• Failed to reject the Ho, there is not enough evidence to support the claim.