Mathematics, 24.01.2020 23:31 marahkotelman
Shortly after september 11th 2001, a researcher wanted to determine if the proportion of females that favored war with iraq was significantly different from the proportion of males that favored war with iraq. in a sample of 73 females, 28 favored war with iraq. in a sample of 54 males, 29 favored war with iraq.
a) let pf represent the proportion of females that favor the war, pm represent the proportion of males that favor the war. what are the proper hypotheses?
a.)h0: pf = pm versus ha: pf > pm
b.)h0: pf < pm versus ha: pf = pm
c.)h0: pf = pm versus ha: pf < pm
d.)h0: pf = pm versus ha: pf ≠ pm
b) what is the test statistic? compute the statistic using male statistics subtracted from female statistics. give your answer to four decimal places.
c) what is the p-value for the test? give your answer to four decimal places.
d) using a 0.01 level of significance, what conclusion should be reached?
a.)the proportion of females that favor the war and the proportion of males that favor the war are significantly different because the p-value is less than 0.01.
b.)the proportion of females that favor the war and the proportion of males that favor the war are not significantly different because the p-value is greater than 0.01.
c.)the proportion of females that favor the war and the proportion of males that favor the war are significantly different because the p-value is greater than 0.01.
d.)the proportion of females that favor the war and the proportion of males that favor the war are not significantly different because the p-value is less than 0.01.
e) what is the lower endpoint of a 99% confidence interval for the difference between the proportion of females that favor the war and the proportion of males that favor the war? give your answer to four decimal places.
f) what is the upper endpoint of a 99% confidence interval for the difference between the proportion of females that favor the war and the proportion of males that favor the war? give your answer to four decimal places.
Answers: 2
Mathematics, 21.06.2019 23:00
72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.
Answers: 1
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