Significance Tests Intro

What is the only option for the null hypothesis? 

• H₀ = k
• H₀ > k
• H₀ < k
• H₀ ≠ k

Which of the following is not an option for an alternate hypothesis? 

• H_a = k
• H_a > k
• H_a < k
• H_a ≠ k

When do you use a t-value instead of a z-value? 

• When n < 30
• When n ≥ 30
• When all of the planets align
• When Ms. O said to

A Type I error is when: 

• We obtain the wrong test statistic
• We reject the null hypothesis when it is actually true
• We fail to reject the null hypothesis when it's actually false
• We reject the alternate hypothesis when it's actually true

Identify the correct null hypothesis:

• H₀: p = 0.50
• H₀: µ = 100
• H₀: p = 0.48
• H₀: µ = 96

We conclude "Fail to reject H₀". What could we use as our interpretation?

• The proportion of babies born male is not 0.50.
• There is not enough evidence to say that the proportion of babies born male is different from 0.50.
• There is not enough evidence to say that the proportion of babies born male is 0.50.

What is the name of the claim we are trying to find evidence against?

• null hypothesis
• alternative hypothesis
• margin of error
• point estimate

What is it called when something is unlikely to happen by chance alone?

• statistically significant
• alpha
• confidence level
• probability

When making the decision regarding the null hypothesis, we should reject when the p-value is _____________.

• large enough
• even
• small
• negative

In performing a hypothesis test where the null

hypothesis is that the μ = 6.9. A random sample of 16

items is selected. It can be assumed that the

population is normally distributed at α = .05.

After running our significance test, we get a p-value of 0.156.

• Reject Ho

• Reject Ha

• Fail to reject Ho

• Fail to reject Ha