Question

ation is studying the effectiveness of a proposed new advertising 4) The Sirius cybernetics corpor campaign for its new line of solar powered flashlights. Ten elected. Five (chosen at random) received the proposed advertising campaign served as a control group; these cities received a placebo advertising campaign. Scale figure (thousands of units sold) are given below. medium-sized test markets were . The other five X-40 X-36 X-4 PROPOSED ADVERTISING PLACEBO ADVERTISING DIFFERENCE 50 42 35 42 10 32 38 18 4 54 40 14 SD= 13.84 SD- 10.20 SD- 7.84 1 State an appropriate null and alternative hypothesis. In words and in symbols Compute an appropriate test static. Give the p-value. Independent sample t-test. Draw an ap of the problem. a) b) c) propriate conclusion, both in statistics jargon (reject/don't reject) an in the context

Answer 1

Null hypothesis: That is, the sales are not increased Alternative hypothesis: That is, the sales are increased. EXCEL Mega Stat) output

Hypothesis Test: Independent Groups (t-test, unequal variance) PROPOSED ADEVERTISING 38.20 17.38 PLACEBO ADVERTISING 34.00 mean 970 std. dev 6 df 4 200 difference (PROPOSED ADEVERTISING PLACEBO ADVERTISING) 8.902 standard enror of difference 0 hypothesized difference 0.47 t 3269 р.value (one-tailed.upper) The value oftest statistic is t = 0.47. The p-value us 0.3269 Conclusion Use a significance level, α 0.05 Here, p-value is 0.3269, which is greater than the value of α 0.05 Thatis p-value0.3269) a(0.05) Therefore, by the rejection rule, do not reject the null hypothesis Ho

Interpretation There is insufficient evidence at level of significance α-0.05. That is, the sales are not increased