Ch 9.1 Lesson

Choose the correct symbols for the Null Hypothesis

• ≠, > or <

• =,≤ or ≥

A particular automobile currently attains a fuel efficiency of 24mpg for city driving. A product research group has developed a new fuel injection system designed to increase the mpg rating. The group will run controlled tests.

What is the null and alternative?

• Ho: µ = 24

  Ha: µ ≠ 24

• Ho: µ ≥ 24

  Ha: µ < 24

• Ho: µ≤ 24

  Ha: µ >24

Now, look at the soft drink bottle example from the manufacturers view. They want the bottle filling machine to be at 67.6 since less would mean their claim on the bottle is incorrect and will result in customer complaints. On the other side, if it is more then the manufacturer is losing money.

What type of test will this be?

• Two tail test

• One tail, upper tail test

• One tail, lower tail test

What is a type I error?

• Rejecting the null when we should not reject the null

• Not rejecting the null when we should reject the null

• setting up the hypothesis test as a two tail when it is a one tail

Tags

CCSS.HSS.IC.B.3