STATISTICS AND PROBABILITY

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

• hypothesis

• null hypothesis

• alternative hypothesis

• two-tailed hypothesis

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

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

• equal

• less than

• not equal

• greater than

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

According to the report, the average weight of a Filipino newborn baby is 2. 8 kgs. Mellissa wants to perform a significance test to see if this holds true in her nation. She takes a random sample of babies and observes that the average weight of newborns is 3kgs. What is the null hypothesis?

• 𝐻o: 𝜇 > 2.8

• 𝐻o: 𝜇 < 2.8

• 𝐻o: 𝜇 = 2.8

• 𝐻o: 𝜇 ≠ 2.8

What kind of hypothesis is illustrated below? The mean score of all Grade 11 students is higher than 75.

• one-tailed test

• two-tailed test

• null hypothesis

• alternative hypothesis

“A modern approach in the advertisement will not increase the demand for a product.” This is an example of _______________ hypothesis.

• Null    

• Mean

• alternative

• right-tailed

What is the alternative hypothesis in the following statement? “The number of defective batteries produced by the company is not equal to 15 batteries a day as claimed by the manager.”

• µ = 15

• µ ≠ 15

• µ > 15

• µ < 15

Which is the correct null hypothesis of the given statement? “According to the owner, an average of 500 people buys foods at McDonalds during breakfast and lunch hours.”

• 𝐻𝑜 = 500

• 𝐻𝑜 ≠ 500

• 𝐻𝑜 < 500

• 𝐻𝑜 > 500