Test of Significance Quiz

A statistical hypothesis is:

• Always true

• An assumption about a population parameter

• A fixed value

• None of these

A null hypothesis is usually denoted by:

• H1

• H2

• H0

• Ha

The alternative hypothesis is accepted when:

• Null hypothesis is rejected

• Null hypothesis is accepted

• Sample size is large

• None of the above

Which of the following is a type I error?

• Accepting H0 when H1 is true

• Rejecting H0 when H0 is true

• Accepting H1 when H0 is true

• Rejecting H1 when H1 is true

Which of the following is a type II error?

• Rejecting H0 when H0 is true

• Accepting H1 when H1 is false

• Accepting H0 when H0 is false

• None of these

The probability of type I error is called:

• Beta

• Significance level (α)

• Confidence level

• Test statistic

Standard error is defined as:

• Sample mean

• Standard deviation of sample mean

• Population mean

• Mode

In large sample tests, the test statistic used for means is:

• z

• t

• F

• χ²

If population standard deviation is known and n > 30, we use:

• t-test

• F-test

• z-test

• χ²-test

Which test is used to compare two population means in large samples?

• t-test

• z-test

• F-test

• χ²-test