2. {1 point) 'Ib intestigate if the skill level of a balner increased after watching an instructional Video1 a statistician collected data on how long it took a halter to make a new to them recipe both before they watched the video and then again after watching the video. In this situation you would be expecting that the statistician is perforating which of the following tests? (a) A one population Ztest about the mean {b} A one population T-test about the mean [cl A two population Z-test about the difference of means {d} A two population T-test about the difference of means {e} A. two population paired difference T-test about the difference of means 3. {1 point) To investigate if the temperature of the room inuences the number of rolls a baker gets out of a standard recipe batch ofdough a statistician collected over 200 data points. The test they are most likely performing is: {a} A x2 test of independence {b} A x2 test of homogeneity [cl A x2 Goodness of Fit test {d} A. one population T-test about the mean {e} A two population T-test about the difference of means 4. {1 point) After googling it, a stats student decided to test if the average weight of a seal is really 265kg or not. Based on 17 data points, the test statistics was 2.25. Based solely on the numbers ofthe provided tables. what of the following condences is the highest they could reject with. (a) 93% {b} 95% [c] 93% {d} 99% {e} 100% 5. {1 point) A local high school principal wants to know what percentage of his students were family members of recent striking workers. In his study of 50 students he only found 3 students were family members. To accurately predict the true percentage at 95% condence he should use (a) A. one population Ztest for proportion {b} A one population ooniidence interval for proportion [cl A. one population Ztest for proportion with synthetic data {d} A. one population ooniidence interval for proportion with synthetic data [e] A two population Z-test for difference in proportion {f} A two population condence interval for difference in proportion Sof 10. (1 point) When performing a Mann-Whitney Test for difference in means between two populations on data sets with similar shaped distributions, the test statistic is: (a) The sum of the positive ranks of population 1 (b) The sum of the positive ranks of population 2 (c) The sum of all positive ranks from both distributions (d) The sum of the ranks in population 1 (e) The sum of rank differences between the populations 11. (1 point) A local students has just performed a test among his friends to discover if the recent homework average grade was under 70% or not. His evidence discovered that at 94% confidence he could in fact say it was under 70. The risk of this result is a (a) Type I error (b) Type II error (c) Type III error (d) Type I and II error (e) no possible error 12. (1 point) In a recent study the interactions in food between color and flavour were carefully studied us- ing a Test of Homogeneity. Based on the following contingency table, the degree of freedom for this test is: Rows: Color Columns: Flavour Bland Sour Spicey Sweet Tangy All Blue O W O 10 Green Orange 10 A - ONW ON Purple -NON HONW Red White All 11 5 11 37 (a) 5 (b) 6 (c) 20 (d) 30 (e) 3613. (1 point) In a recent study of on effects of smoking on liver cancer it was discovered that 37 of 100 patients with liver cancer smoked. For building a confidence interval for this parameter the necessary information would be (a) # = .37 and o = 0.0483 (b) p = .37 and o = 0.0483 (c) p = .37 and s = 0.0483 (d) p = .37 and a = 0.0483 (e) p = .37 and s = 0.049414. (1 point) Last year it was definitively proven that the average weight of a male golden Dragon baby was 1234kgs. This year you decided to collect data on female golden Dragon babies to see if their average weight is less that 1234kgs. It was handed down from the grand elders of the village that the standard deviation of this situation is 234kgs. The appropriate test is: (a) A one population Z-test about the mean (b) A one population T-test about the mean (c) A two population Z-test about the difference of means (d) A two population T-test about the difference of means (e) A two population paired difference T-test about the difference of means (f) A x2 test of independence (g) A x2 test of homogeneity (h) A x2 Goodness of Fit test 15. (1 point) You are very interested to see if the calories in two different types of protein bars are the same or not and collect 25 random samples of each bar for analyzing. The appropriate test is: (a) A one population Z-test about the mean (b) A one population T-test about the mean (c) A two population Z-test about the difference of means (d) A two population T-test about the difference of means (e) A two population paired difference T-test about the difference of means (f) A x2 test of independence (g) A x2 test of homogeneity (h) A x2 Goodness of Fit test 16. (1 point) To find out if boxes of Timbiebs from Tim Horton's box have a specific distribution of Timbiebs (50% fudge, 30% birthday and 20% waffer) , a local foodie decided to order 100 boxes randomly from 100 different stores to examine. the test he is going to perform will be a: (a) A one population Z-test about the mean (b) A one population T-test about the mean (c) A two population Z-test about the difference of means (d) A two population T-test about the difference of means (e) A two population paired difference T-test about the difference of means (f) A x2 test of independence (g) A x2 test of homogeneity (h) A x2 Goodness of Fit test