1. In hypothesis testing,type I error occurs when

I. H₀is rejected when it is false

II. H₁is rejected when it is false

III. H₀is rejected when is is true

IV. H₀is accepted when it is false

V. None of the above

2.A college professor claims that the average cost of a paperback text book is greater than RM 75.A sample of 12 paperback textbooks has an average cost of RM 78.60 and a standard deviation of RM 5.25.Test whether the claim is true using 10% level of significance. Assume that the cost is normally distributed.

Question: What is the test statistic value for the above problem?

I. -5.443

II. -2.375

III. 0.686

IV. 2.375

V. None of the above

3.A college professor claims that the average cost of a paperback text book is greater than RM 75.A sample of 12 paperback textbooks has an average cost of RM 78.60 and a standard deviation of RM 5.25.Test whether the claim is true using 10% level of significance. Assume that the cost is normally distributed.

Question: The rejection criterion for the above problem is

I. Reject H₀if test statistic value is less than -1.363

II. Reject H₀if test statistic value is more than 1.282

III. Reject H₀if test statistic value is more than 1.363

IV. Reject H₀if test statistic value is less than -1.282.

V. Reject H₀if test statistic value is between -1.796and 1.796

4. What is the critical values for a 2 tailed hypothesis test on population mean (H₁: k) when is 5% and the population standard deviation is known?

I. 0.5199

II. 2.920

III. 1.645

IV. 1.96

V. None of the above.

5. A college professor claims that the average cost of a paperback text book is greater than RM 75. A sample of 12 paperback textbooks has an average cost of RM 78.60 and a standard deviation of RM 5.25.Test whether the claim is true using 10% level of significance. Assume that the cost is normally distributed.

Question: What would be the appropriate hypotheses for the above problem?

I.

H₀:< 75

H₁: 75

II.

H₀:75

H₁:> 75

III.

H₀: 75

H₁:< 75

IV.

H₀: 78.60

H₁:> 78.60

V. None of the above.