Test About Population Data

Identify the correct null hypothesis:

Is the proportion of babies born male different from 50%? In a sample of 200 babies, 96 were male. Test the claim using a level of significance of 1%.

• H₀: p = 0.50

• H₀: µ = 100

• H₀: p = 0.48

• H₀: µ = 96

Test the claim about the mean of the differences for a population of paired data at the level of significance a. Assume the samples are random, dependent and the populations are normally distributed.

• Fail to reject Ho; there is not enough evidence to SUPPORT the claim.

• Reject Ho; there is enough evidence to SUPPORT the claim.

• Reject Ho; there is enough evidence to REJECT the claim.

• Fail to reject Ho; there is not enough evidence to REJECT the claim.

Test the claim about the mean of the differences for a population of paired data at the level of significance a. Assume the samples are random, dependent and the populations are normally distributed.

• Fail to reject Ho; there is not enough evidence to SUPPORT the claim.

• Fail to reject Ho; there is not enough evidence to REJECT the claim.

• Reject Ho; there is enough evidence to SUPPORT the claim.

• Reject Ho; there is enough evidence to REJECT the claim.

Test the claim about the mean of the differences for a population of paired data at the level of significance a. Assume the samples are random, dependent and the populations are normally distributed.

• Fail to reject Ho; there is not enough evidence to SUPPORT the claim.

• Fail to reject Ho; there is not enough evidence to REJECT the claim.

• Reject Ho; there is enough evidence to SUPPORT the claim.

• Reject Ho; there is enough evidence to REJECT the claim.

_______ is the entire group of objects or individuals considered for a survey.

• Sample

• Population

• Random Sample

• Quartile

You have an SRS of 23 observations from large population. The distribution of sample values is roughly symmetric with no outliers. What critical value would you use to obtain a 98% confidence interval for the mean of the population?

• 2.177

• 2.183

• 2.326

• 2.500

• 2.508

What test should be used?

• 2 proportion z test

• 1 proportion z test

• 2 sample t test for means

• 1 sample t test for mean

What test should be used?

• 2 Sample t test for difference in means

• 2 proportion z test

• Paired t test

• 1 sample z test

A random sample of 25 Ohio students had a mean ACT score of 21 with a standard deviation of 1.2.  Which of the following is the 95% confidence interval for the true average ACT score for Ohio students?

• (20.53, 21.47)

• (18.648, 23.352)

• (20.505, 21.495)

The entire group

• population

• sample

• clusters

• gap