Testing of Hypotheses

The rejection probability of Null Hypothesis when it is true is called as?

• Level of Confidence

• Level of Significance

• Level of Margin

• Level of Rejection

If the Critical region is evenly distributed then the test is referred to as?

• Two tailed

• One tailed

• Three tailed

• Zero tailed

What is the assumption made for performing the hypothesis test with T distribution?

• the distribution is non-symmetric

• the distribution has more than one modal class

• the distribution has a constant variance

• the distribution follows a normal distribution

The range of Level of Significance lies between ____________

• -∞ and 0

• -∞ and ∞

• 0 and ∞

• 0 and 1

A T-test sample has 7 pairs of samples. The distribution should contain ____________

• 16 degrees of freedom

• 15 degrees of freedom

• 5 degrees of freedom

• 6 degrees of freedom

Which of these distributions is used for a testing hypothesis?

• Normal Distribution

• Chi-Squared Distribution

• Gamma Distribution

• Poisson Distribution

One problem with hypothesis testing is that a real effect may not be detected. This problem is most likely to occur when

• the effect is small and the sample size is small.

• the effect is large and the sample size is small.

• the effect is small and the sample size is large.

• the effect is large and the sample size is large.

Which of the following p-values will lead us to reject the null hypothesis if the significance level of the test is 5%?

• 0.15

• 0.10

• 0.06

• 0.025

If my null hypothesis is ‘Dutch people do not differ from English people in height’, what is my alternative hypothesis?

• All of the statements are plausible alternative hypotheses.

• Dutch people are taller than English people.

• English people are taller than Dutch people.

• Dutch people differ in height from English people.

The following are percentages of fat found in 5 samples of each of two brands of baby food:

A: 5.7, 4.5, 6.2, 6.3, 7.3

B: 6.3, 5.7, 5.9, 6.4, 5.1

Which of the following procedures is appropriate to test the hypothesis of equal average fat content in the two types of ice cream?

• Paired t-test with 5 d.f

• Two samples t-test with 8 d.f

• Paired t-test with 4 d.f

• Two samples t-test with 9 d.f