Statistics Quiz

A composite hypothesis specifies:

• No parameters

• One parameter only

• A range of values for the parameter

• Fixed value for a parameter

If the null hypothesis is rejected, then:

• It is accepted

• The data is wrong

• The alternative hypothesis is accepted

• The test is repeated

A two-tailed test considers:

• One direction deviation

• No deviation

• Both directions

• Only positive deviation

The region in which we reject the null hypothesis is called:

• Null zone

• Acceptance region

• Sampling zone

• Critical region

Type I error occurs when:

• Null hypothesis is true but rejected

• Null hypothesis is false but accepted

• Both are true

• Both are false

Type II error is:

• Rejecting H₀ when it is true

• Accepting H₀ when it is false

• Accepting H₁ when H₀ is true

• None of the above

Standard error is:

• Standard deviation of the sample mean

• Mean of the sample

• Error in sampling

• Difference between means

As sample size increases, the standard error:

• Increases

• Decreases

• Remains same

• Becomes zero

Sampling distribution of the sample mean is:

• Always normal

• Approximately normal for large samples

• Uniform

• Binomial

The standard error of the mean for a sample of size n is:

• σ²/n

• σ/√n

• √n/σ

• n/σ