Current Attempt in Progress Selecting a Significance level In the situation below, indicate whether it makes more sense to use a relatively large significance level (such as a = 0.10) or a relatively small significance level (such as a = 0.01). Testing a new drug with potentially dangerous side effects to see if it is significantly better than the drug currently in use. If it is found to be more effective, it will be prescribed to millions of people. O Small O Large6of12 ( > -/2 i: 0 More than 60% of people eat breakfast in the morning. 0 The proportion of all people who eat breakfast in the morning is not greater than 60%. Q We do not nd evidence that the proportion is greater than 60% when the reality is that the proportion really is greater than 60%. Q We nd evidence that the proportion is greater than 60% when the reality is that the proportion is really not greater than 60%. 10f12 ) -/12 i: O A 240 A 140 b == . d == .7 \"pl 300 083\" 102 200 0 Round your answer to three decimal places. pvalue = Are the results signicant at the 5% level? 0 (c) Which provides the strongest evidence for the alternative hypothesis? 0 f1 10f12 > -/12 ;= (I Yes = 0.7 R NO places. pvalue = Are the results signicant at the 5% level? 0 (c) Which provides the strongest evidence for the alternative hypothesis? 0 5 of 12 - /1 E . . . View Policies Current Attempt in Progress Selecting a Significance level In the situation below, indicate whether it makes more sense to use a relatively large significance level (such as a = 0.10) or a relatively small significance level (such as a = 0.01). Using a sample of 10 games each to see if your average score at Wii bowling is significantly more than your friend's average score. O Large O Small3 of 12 > - 12 E . . . Eating Breakfast Cereal and Conceiving Boys Newscientist.com ran the headline "Breakfast Cereals Boost Chances of Conceiving Boys," based on an article which found that women who eat breakfast cereal before becoming pregnant are significantly more likely to conceive boys. The study used a significance level of a = 0.01. The researchers kept track of 133 foods, and for each food, tested whether there was a difference in the proportion conceiving boys between women who ate the food and women who didn't. Of all the foods, only breakfast cereal showed a significant difference. If none of the 133 foods actually have an effect on the gender of a conceived child, how many (if any) of the individual tests would you expect to show a significant result just by random chance? test(s)1 of 12 > - /12 E . . . In this exercise, test Ho : P1 = P2 VS Ha : P1 > P2, with p1 - P2 = 0.8 - 0.7 = 0.10 for different sample sizes. In parts (a) and (b), use StatKey or other technology to find the p-value. Click here to access StatKey. 24 14 (a) p1 = 30 = 0.8 and p2 = 20 = 0.7 Round your answer to two decimal places. p-value = HI Are the results significant at the 5% level? C 240 140 P1 = = 0.7 300 = 0.8 and p2 = 2006 of 12 - 12 E . . . WIN - View Policies Current Attempt in Progress We are testing to see if there is evidence that the proportion of people who ate breakfast that morning is greater than 60%. We have: Ho: p = 0.6 vs Ha : p > 0.6 Part 1 (a) What does it mean to make a Type I error in this situation? O We find evidence that the proportion is greater than 60%. O We do not find evidence that the proportion is greater than 60%. O More than 60% of people eat breakfast in the morningIn this exercise, we are conducting many hypothesis tests to test a claim. Assume that the null hypothesis is true. If 100 tests are conducted using a significance level of 5 % , approximately how many of the tests will incorrectly find significance? of the tests will find significance