Finals Review Quiz

Central Limit states that “as the sample size becomes bigger, the sampling distribution of the sample mean can be approximated by a normal probability distribution”?

• True

• False

• No Answer

• Not sure

Which of the following describes the symbol μ ?

• Sample Mean

• Population Mean

• Population standard deviation

• Sample Size

Which of the following describes the symbol σ?

• Sample Mean

• Population Mean

• Population standard deviation

• Sample Size

Which of the following describes the symbol x̄?x ̅

• Population standard deviation

• Sample Mean

• Sample size

• Population mean

The average time it takes a group of Senior High School Students to complete a Math examination is 48.2 minutes. The standard deviation is 11 minutes. If 40 randomly selected SHS student take the examination, what is the probability that the mean time it takes a group to complete the test will be in less than 45 minutes?

• 1.83

• 1.84

• -1.84

• -1.83

Given that the z- value is equal to 0.4678, what is the probability that the mean time it takes a group to complete the test will be in less than 45 minutes?

• 3.22%

• 0.0322

• 0.0322%

• 3.22

What is the other term for T-distribution?

• Standard distribution

• Student’s T-distribution

• Central distribution

• Gaussian distribution

In 1908, who developed T-distribution

• Ronald Fisher

• Karl Pearson

• Jerzy Neyman

• William Gosset

As the degrees of freedom increases, it becomes narrower and more peaked.

• True

• False

• No answer

• Not sure

The symbol for level of significance is ∞.

• True

• No answer

• False

• Not sure