REVIEW - STATS

Question 1

The numerical measure that describes the certain characteristics of a population is called ______________.

Accepted Answer

parameter

Question 2

Consider this statement: New cars are expected to last an average of at least three years before needing major service.

Accepted Answer

Ho: μ ≤ 3

Question 3

When is a Type I error committed?

Accepted Answer

We reject a null hypothesis that is true.

Question 4

What is the other term for t-distribution?

Accepted Answer

Student’s t-distribution

Question 5

What is the level of significance if the confidence interval is 90%?

Accepted Answer

0.10

Question 6

Which of following denotes the true value that would be obtained if a census rather than a sample was undertaken?

Accepted Answer

parameter

Question 7

Mother gives me at most P200 allowance in a week. Which of the given expressions describes the situation?

Accepted Answer

n ≤ 200

Question 8

What kind of parameter is applied in the given situation? “The mean height of all Grade 11 students is 170 cm.”

Accepted Answer

mean

Question 9

Which of following is NOT a parameter?

Accepted Answer

Σ

Question 10

If the computed z-value is 1.286 and the critical value is 1.383, which of the following statements could be true?

Accepted Answer

It lies in the non-rejection region, hence we fail to reject 𝐻𝑜.

Question 11

Which of these is a correct alternative hypothesis for a two‐tailed test?

Accepted Answer

Ha: μ ≠ 7

Question 12

This refers to the measure of position whose data is divided into 100 parts.

Accepted Answer

Percentiles

Question 13

Which of the following symbols is used for population proportion?

Accepted Answer

𝑝

Question 14

In a one-tailed test, in which critical values below will the computed z of 2.312 falls in the non-rejection region?

Accepted Answer

2.354

Question 15

What will be the degree of freedom of the data with a sample size of 20?

Accepted Answer

19

Question 16

Which of the following symbols is used for population standard deviation?

Accepted Answer

𝜎

Question 17

Which of the following describes a null hypothesis using two-tailed test?

Accepted Answer

𝐻0: 𝜇 = 𝜇0

Question 18

A certified public accountant claims that more than 30% of all accountants advertise. What kind of parameter is it?

Accepted Answer

proportion

Question 19

A son’s savings (n) is greater than P1,500. Which of the given equality/inequality expressions describes the situation?

Accepted Answer

n > 1,500

Question 20

What are the two common parameters of normal distribution?

Accepted Answer

𝜇 and 𝜎

Questions 20