Formulating Null and Alternative Hypothesis

This hypothesis states that there is no difference between population parameters and the hypothesized value.

• hypothesis

• null hypothesis

• alternative hypothesis

• two-tailed hypothesis

The sign of the alternative hypothesis in a left-tailed test is always_________.

• equal

• less than

• not equal

• greater than

When the value of parameter has significant difference with the hypothesized value, then it is called ________________.

• one-tailed test

• two-tailed test

• null hypothesis

• alternative hypothesis

If the researcher wishes to test the claim that the mean of the population is 75, the appropriate null hypothesis is:

• 𝜇 ≤ 75

• 𝜇 ≥ 75

• 𝜇 ≠ 75

• 𝜇 = 75

A researcher thinks that if expectant mothers use vitamins, the birth weight of the babies will increase. The average birth weight of the population is 3.9 kgs. What is the alternative hypothesis?

• 𝐻𝑎: 𝜇 > 3.9

• 𝐻𝑎: 𝜇 < 3.9

• 𝐻𝑎: 𝜇 = 3.9

• 𝐻𝑎: 𝜇 ≠ 3.9

The average height of a 1-year old child is 29 inches. What is the parameter?

• a one-year old child

• the mean height of 33 inches

• the average height of 29 inches

• a sample of 30 children who are 1-year old

“New cars are expected to last an average of at least three (3) years before needing major service.” Which of the following is the null hypothesis?

• 𝐻𝑜: μ ≤ 3

• 𝐻𝑜: μ < 3

• 𝐻𝑜: μ > 3

• 𝐻𝑜: μ ≥ 3

Which is the correct null hypothesis of the claim below?

“Students take an average of less than five (5) years to graduate from college.”

• 𝐻𝑜: μ = 5

• 𝐻𝑜: μ < 5

• 𝐻𝑜: μ ≠ 5

• 𝐻𝑎: μ < 5

A vacuum cleaner consumes less than 46 kwh per year. What hypothesis test can you use in this claim?

• left-tailed

• right- tailed

• Null Hypothesis

• Alternative Hypothesis

Which of the following describes an alternative hypothesis using two-tailed test?

• 𝐻𝑎: 𝜇 < 50 𝑦𝑒𝑎𝑟𝑠 𝑜𝑙𝑑

• 𝐻𝑎: 𝜇 > 50 𝑦𝑒𝑎𝑟𝑠 𝑜𝑙𝑑

• 𝐻𝑎: 𝜇 ≠ 50 𝑦𝑒𝑎𝑟𝑠 𝑜𝑙𝑑

• 𝐻𝑎: 𝜇 = 50 𝑦𝑒𝑎𝑟𝑠 𝑜𝑙𝑑