Several companies have been developing electronic guidance systems for cars. Motorola and Germany's Blaupunkt are two firms at the forefront of such research. Out of 120 trials of the Motorola model, 101 were successful; and out of 200 tests of the Blaupunkt model, 110 were successful. Is there evidence to conclude that the Motorola electronic guidance system is superior to the German competitor? State the null and alternative hypothesis. Test the hypothesis with significance level of 5%. State your conclusion. 2.) In a recent test of the effectiveness of a new sleeping pill, three groups of 10 patients each were given the following treatments. One group was given the drug, the second group was given a placebo, and the third group was given no treatment at all. The results are as follows. Are there significant differences on the the three groups' results? Drug group 12, 17, 34, 11, 5, 42, 18, 27, 2, 37 Placebo group 44, 32, 28, 30, 22, 12, 3, 12, 42, 13 No-treatment group 32, 33, 21, 12, 15, 14, 55, 67, 72, 44 State the null and alternative hypothesis. Test the hypothesis with significance level of 5%. State your conclusion.
1.)
Several companies have been developing electronic guidance systems for cars. Motorola and Germany's Blaupunkt are two firms at the forefront of such research. Out of 120 trials of the Motorola model, 101 were successful; and out of 200 tests of the Blaupunkt model, 110 were successful. Is there evidence to conclude that the Motorola electronic guidance system is superior to the German competitor?
- State the null and alternative hypothesis.
- Test the hypothesis with significance level of 5%.
- State your conclusion.
2.)
In a recent test of the effectiveness of a new sleeping pill, three groups of 10 patients each were given the following treatments. One group was given the drug, the second group was given a placebo, and the third group was given no treatment at all. The results are as follows. Are there significant differences on the the three groups' results?
Drug group |
12, 17, 34, 11, 5, 42, 18, 27, 2, 37 |
Placebo group |
44, 32, 28, 30, 22, 12, 3, 12, 42, 13 |
No-treatment group |
32, 33, 21, 12, 15, 14, 55, 67, 72, 44 |
- State the null and alternative hypothesis.
- Test the hypothesis with significance level of 5%.
- State your conclusion.
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