STATISTICS & PROBABILITY

Anna wants to estimate the average shower time of teenagers. From the sample of 50 teenagers, she found out that it takes 5 minutes for teenagers to shower. What is the parameter?

• A. number of students

• B. 5 minutes for shower time

• C. Average shower time of teenagers

• D. Average shower time of 50 teenagers.

An education official wants to estimate the proportion of adults aged 18 and above who had read at least one book during the previous year. A random sample of 1,006 adults aged 18 or older is obtained, and 835 of those adults had read at least one book during the previous year. Determine the parameter in the situation.

• A. random sample of 1,006

• B. aged 18 or older

• C. 835 of those adult

• D. all of the above

What is the parameter to be tested in this claim? As stated by a company's shipping department, the number of shipping errors per million shipments has a standard deviation of 2.7.

On average, the household electricity consumption in the country was about 248.1-kilowatt hours in 2015. Electricity was used primarily for lighting purposes, cooking, recreation, and space cooling. Which inequality symbols are correct (=, ≠, ≥, <, >, ≤) for the null and alternative hypotheses: 𝐻𝑜: µ __ 248.1, 𝐻𝑎: µ __ 248.1?

• >

• ≠

• ≥

• =

• <

In symbols, what is the parameter in the given claim below? In 2018, DepEd reported that the proportion of Grade 10 completers who proceeded to Grade 11 is 93%.

What are the two common parameters of normal distribution?

• 𝜇 and 𝜎

• 𝑝 and 𝜇

• 𝜎 and 𝑝

• 𝑝̂and p

It is the statistical method used in making decisions using experimental data.

• observation

• simple analysis

• analytical testing

• hypothesis testing

When is a Type I error committed?

• We reject a null hypothesis that is true.

• We reject a null hypothesis that is false.

• We fail to reject a null hypothesis that is true.

• We fail to reject a null hypothesis that is false.

Which of the following is a Type I error?

• 𝐻0 is true; reject 𝐻0.

• 𝐻0 is false; reject 𝐻0.

• 𝐻0 is true; fail to reject 𝐻0.

• 𝐻0 is false; fail to reject 𝐻0.

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

• sample

• statistics

• parameter

• population