Question

PPH4801/MPHDHM9 Jan/Feb 2018 To evaluate the effectiveness of 2 different smoking cessation programs, smokers are e either program A or program B Of 6 smokers on program A, 1 statistical procedure would you use to test null hypothesis that the programs 20 randomızed to recerv stopped not Which are equally effective and to obtain a p-value? o soking and 5 did not Of 6 smokers on program B, 4 stopped smoking and 2 did 1 Pared t-test 2 Fischer's exact test 3 One Way Analysis of Variance 4 Chi Square test 21 Cold No Cold 85 75 160 Vitamin A Placebo 15 25 40 100 200 If you were interested in testing for a statıstical relationship between taking Vitamın A and cold status in the population of elementary school students (i e testing the null hypothesis of no difference in the proportion of colds in Vitamin A and placebo groups, versus the alternative of a difference in proportions), the correct statistcal test is 1 Two-sample t-test 2 Ad-hoc test for testing the equality of things 3 Chi-squared test 4 Paired t-test 22 The duration of time from first exposure to HIV infection to AIDS diagnosis is called the bation penod The incubation peniods of a random sample of 7 HIV infected individuals s given below (in years) 12 0, 9 5, 13 5, 7 2, 10 5, 8 3, 125 Calculate the sample mean, 1 67 2 102 3 16 5 4 109

Answer 1

Q. No 20 Answer : is '1'

here we can use the paired t - test, because in t - we will compare the two population ,and where we have to samples, to compare and to find nullhypothesis, we will use paired t -test.

here, there was a two different smoking cessation programmes, those are A and B. and samples are also decided in this.

so the answer is '1' paired t -test.

Q. No. 21 Answer : is '1'

Because here only two groups are there, to compare two groups and see difference between two groups we will use two sample t - test.

So the answer is '1'.

Here I attached an image for Q. No 22.