1) If the claim is that the proportion of smoker is less than 20% in the population Question 1 options: This is two sided test This is left sided test This is right sided test 2) Find the critical value to test the claim that the mean population height is not 5.6 ft. Assume population standard deviation sigma is known and alpha= 5%. (To find critical value it is better to draw Z-curve first). Question 2 options: 1.96 0.05 2.85 1.645 2.575 3) Find the power of the test when the probability of Type II error is 35%. Question 3 options: 55% 65% None fo the answers are correct 35% 45% 4) For the right tailed Z test (or right sided test), If test value is 2.34 and the critical value is 1.96 then Question 4 options: Cannot make decision Reject H0 Accept H0 5) What will be the decision when testing hypothesis, If p- value is found to be 0.075 and the decision is to be made at 95% confidence level. Question 5 options: Test is inconclusive We rejct the null hypothesis We donot rejcet the null hypothesis 6) To test the claim that proportion of smoker is not 25%, lets suppose we calculated the test value Z= 2.45 then the p-value for this test is Question 6 options: 0.0142 0.9929 0.8621 0.0071 7) For right sided test for proportion, use Z-table to find the critical value when alpha= .08. Question 7 options: 1.24 1.96 2.65 1.405 8) A factory is producing 50000 pairs of shoes. To test the claim that higher than 2% of the shoes are sub standard, we took a sample of 700 pairs and found that 2.75% of them are sub standard quality. Find the test value in this case Question 8 options: 0.0145 1.45 1.417 1.01 9) A factory is producing 50000 pairs of shoes. To test the claim that less than 1% of the shoes are sub standard, we took a sample of 500 pairs and found that 1.45% of them are sub standard quality. Find the critical value if the test is done with 5% level of significance (alpha=5%). Question 9 options: 1.645 1.96 -1.645 -1.96 2. 575 10) Use Z-table to find p-value, if the test value for the left sided test is found to be -2.15 Question 10 options: 0.9842 0.0158 0.0316 0.765 11) If we accept a Null Hypothesis ( H0 ) when it is false, the type of error we have is Question 11 options: Correct decision Type I error Type III error Type II error 12) To test the claim that mean is greater than 8, we took a sample of size 25 and found that the sample mean 9. if the population standard deviation is known to be 2, calculate the test value Question 12 options: 2.5 0.8 0.3 -0.1 -2.5 13) To test the claim that the mean weight is greater than 166.3 lbs. A sample of 40 people showed that the sample mean was 172.55 and sample standard deviation (s) was found to be 26.33 lbs. then the test value is: Question 13 options: t=1.5 Z=1.5 Z=2.5 t=2.5 14) To test the claim that mean weight is greater than 166.3 lbs. A sample of 40 people showed that the sample mean was 172.55. If the population standard deviation is known to be 26.33 lbs. Find the critical value when alpha=5% Question 14 options: 2.58 3.12 1.645 1.96 15) If it is one sided test and alpha=0.05. Find t(alpha) from t-table if sample size is 10. Question 15 options: 2.262 1.228 1.812 1.833 16) The Eagle Ridge Contractors Association claims the average price of a home in their subdivision not $125,150 with a known population standard deviation of $7,360. A sample of 36 homes for sale in this subdivision had an average selling price of $128,550. Find the pvlaue. Question 16 options: 0.0070 0.0035 0.0028 0.0056 17) The Eagle Ridge Contractors Association claims the average price of a home in their subdivision is not $125,150 with a population standard deviation of $7,350. A sample of 36 homes for sale in this subdivision had an average selling price of $123,550. Find the test value. Question 17 options: -1.31 1.9 2.5 1.31 18) To test the claim that the average height of students is greater than 5.2 ft. If we took a sample of size 35 students and calculated the p-value to be 0.035. What is your conclusion? Question 18 options: Reject null hypothesis with 95% confidence. Reject null hypothesis with 99% confidence. Reject null hypothesis with 98% confidence. Reject null hypothesis with 97% confidence. 19) In order to test the claim that population variance is greater than 5.7 a random sample of size 12 is taken. Find the critical value from chi-square table when alpha=10% Question 19 options: 24.725 26.217 17.275 18.549 20) In order to test population variance is greater than 2.5 a random sample of size 12 is taken and the test value is calculated as 22.76. The p value for this test (from Chi-square table) is: Question 20 options: 5%