Question

- 3 - 5 A mom slection of volunteers at a research Institute have been on to a typical cold virus. After they started to have coild symptoms, 15 of them were given muutamia ts daily which c an 3 grams of vitamin C and various other vitamins and minerals. The remaining 15 volunteers were given placebo Tablets for each individual, the length of time taken to recover from old recorded. At the end of the experiment following data are obtained 161, 152 ,4 64 TWITTER the option and of every time is 15 ca r hans com the meantim d recovery time from with place i e tre t is 13 days when treated with uitivitamin, and the population standard deviation not that both m y normally distributed. The mutiaminate the mean t ime of the ants who are Goth a t the necesita, consulta

Answer 1

Multivitain	placebo
7	7.1
6.7	5.4
7.5	4.3
8.2	5.6
3	5.6
3.7	4.3
6.9	1.6
7.1	3.5
6.4	4.8
4	3.8
6.2	5.9
4.7	4.4
6.9	4.5
3.4	6.8
4.1	5.4
5.72	4.866667	mean

Ho: fi = H2 Ha: ui 7 M2

test-statistic is Z

The Z-statistic is computed as follows: Ã1 - 72 vo/nı + ož/n2 5.72 – 4.866667 = 1.411 V1.82/15 + 1.52 /15 –

z = 1.411

p-value = 2*P(Z > 1.411) = 0.1584

as p-value > alpha , we fail to reject the null hypothesis

hence No