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Many investors and financial analysts believe the Dow Jones Industrialwerage {DJIl} gives a good barometer of the overall stock market. l[in January 31, 20015, 9
Many investors and financial analysts believe the Dow Jones Industrialwerage {DJIl} gives a good barometer of the overall stock market. l[in January 31, 20015, 9 of the 30 stocks making up the DJIA increased in price {The Wall Street Journal, February 1, 20015]. On the basis of this fact, a financial analyst claims we can assume that 303:1 of the stocks traded on the New York Stock Exchange {NYSE} went up the same day. A sample of 51 stocks traded on the NYSE that day showed that EU went up. You are conducting a study to see if the proportion of stocks that went up is significantly more than [3.3. You use a significance level of or = {11305. What is the test statistic for this sample? [Report answer accurate to three decimal places.] test statistic = I I What is the p-value for this sample? [Report answer accurate to four decimal places.]: p-value = I I The I -value is... (:3 less than {or equal to} Cl C?) greater than or did This test statistic leads to a decision to... O reject the null Cl accept the null (I?) fail to reject the null div" As such the final conclusion is that... Q There is sufficient evidence to warrant rejection of the claim that the proportion of stocks that went up is more than 0.3. C) There is not sufficient evidence to warrant rejection of the claim that the proportion of stocks that went up is more than 0.3. O The sample data support the claim that the proportion of stocks that went up is more than 0.3. C?) There is not sufficient sample evidence to support the claim that the proportion of stocks that went up is more than 0.3. Ogv' You are conducting a study to see if the proportion of voters who prefer Candidate A is significantlv different from [3.51. You use a significance level of or = . Hi] 1;] = '15]. H1 : 15 9E [L51 'I'ou obtain a sample of size n = 415 in which there are 20? successes. What is the test statistic for this sample? [Report answer accurate to three decimal places.] test statistic = What is the p-value for this sample? [Report answer accurate to four decimal places.] p-value = The p-value is... C? less than [or equal to} Ct CF greater than Cl! This test statistic leads to a decision to... CF reject the null CF accept the null '33? fail to reject the null As such. the final conclusion is that... '11? There is sufficient evidence to warrant rejection of the claim that the proportion of voters who prefer Candidate A is different from 13.51. '33? There is not sufficient evidence to warrant rejection of the claim that the proportion of voters who prefer Candidate A is different from 13.51. '11? The sample data support the claim that the proportion of voters who prefer Candidate A is different from 0.51. '35:? There is not sufficient sample evidence to support the claim that the proportion of voters who prefer Candidate A is different from I151
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