Assessment

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

• sample

• statistics

• parameter

• population

What are the two common parameters of normal distribution?

• 𝜇 and 𝜎

• 𝜎 and 𝑝

• 𝑝 and 𝜇

• 𝑝̂ and 𝑝

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?

• sample of 50 teenagers

• 50 teenagers in 5 minutes

• average shower time of teenagers

• took 5 minutes for teenagers to shower

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

• mean

• variance

• proportion

• standard deviation

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.

• The parameter is the 835 adults.

• The parameter is the average of adults aged 18 and above.

• The parameter is the proportion of adults who had read at least one book during the previous year.

• The parameter is the random sample of 1,006 adults 18 and above who had read a book in the previous year.

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

• sample

• statistic

• parameter

• population

Which of following is NOT a parameter?

• 𝜎

• Σ

• µ

• 𝑝

Which of the following symbols is used for population variance?

• Σ

• 𝜎²

• 𝜎

• µ

A study claims that the mean survival time for a certain cancer patient treated immediately with chemotherapy and radiation is 24 months. Which is the parameter?

• 24 months

• study claims on cancer

• mean survival time for a certain cancer patient

• mean survival time of 24 months with chemotherapy and radiation

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.

• million shipments

• standard deviation of 2.7

• number of shipping errors

• company shipping department