In a random sample of males, it was found that 28 write with their left hands and 221 do not. In a random sample of females, it was found that 57 write with their left hands and 466 do not. Use a 0.01 significance level to test the claim that the rate of left-handedness among males is less than that among females. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of males and the second sample to be the sample of females. What are the null and alternative hypotheses for the hypothesis test? A. Ho: P1 SP2 H1: P1 #P2 В. Но: Р1 — Р2 H1: P1 > P2 C. Ho: P12 P2 H1: P1 #P2 O D. Ho: P1 = P2 H1: P1

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In a random sample of males, it was found that 28 write with their left hands and 221 do not. In a random sample of
females, it was found that 57 write with their left hands and 466 do not. Use a 0.01 significance level to test the
claim that the rate of left-handedness among males is less than that among females. Complete parts (a) through (c)
below.
a. Test the claim using a hypothesis test.
Consider the first sample to be the sample of males and the second sample to be the sample of females. What are
the null and alternative hypotheses for the hypothesis test?
OC. Ho: P1 2 P2
H1: P1 # P2
A. Ho: P1 <P2
B. Ho: P1 = P2
H1:P1 # P2
H1: P1> P2
O E. Ho: P1 = P2
H1: P1 # P2
O F. Ho: P1 # P2
H1: P1 = P2
O D. Ho: P1 = P2
H1: P1 <P2
Transcribed Image Text:In a random sample of males, it was found that 28 write with their left hands and 221 do not. In a random sample of females, it was found that 57 write with their left hands and 466 do not. Use a 0.01 significance level to test the claim that the rate of left-handedness among males is less than that among females. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of males and the second sample to be the sample of females. What are the null and alternative hypotheses for the hypothesis test? OC. Ho: P1 2 P2 H1: P1 # P2 A. Ho: P1 <P2 B. Ho: P1 = P2 H1:P1 # P2 H1: P1> P2 O E. Ho: P1 = P2 H1: P1 # P2 O F. Ho: P1 # P2 H1: P1 = P2 O D. Ho: P1 = P2 H1: P1 <P2
Identify the test statistic.
z= - 1.14
(Round to two decimal places as needed.)
Identify the P-value.
P-value = .126
(Round to three decimal places as needed.)
What is the conclusion based on the hypothesis test?
The P-value is greater than the significance level of a = 0.01, so fail to reject the null hypothesis. There is not sufficient evidence to support the claim that the rate of left-handedness among males is less than that among females.
b. Test the claim by constructing an appropriate confidence interval.
(P1 - P2)
(Round to three decimal places as needed.)
The 98% confidence interval is -.086 <
< .028 .
What is the conclusion based on the confidence interval?
Because the confidence interval limits
include
0, it appears that the two rates of left-handedness are equal.
There is not sufficient evidence to support the claim that the rate of left-handedness among males is less than that
among females,
c. Based on the results, is the rate of left-handedness among males less than the rate of left-handedness among females?
O A. The rate of left-handedness among males does appear to be less than the rate of left-handedness among females because the results are statistically significant.
B. The rate of left-handedness among males does not appear to be less than the rate of left-handedness among females.
C. The rate of left-handedness among males does appear to be less than the rate of left-handedness among females because the results are not statistically significant.
OD.
The results are inconclusive.
Ouestion is emplote
Transcribed Image Text:Identify the test statistic. z= - 1.14 (Round to two decimal places as needed.) Identify the P-value. P-value = .126 (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? The P-value is greater than the significance level of a = 0.01, so fail to reject the null hypothesis. There is not sufficient evidence to support the claim that the rate of left-handedness among males is less than that among females. b. Test the claim by constructing an appropriate confidence interval. (P1 - P2) (Round to three decimal places as needed.) The 98% confidence interval is -.086 < < .028 . What is the conclusion based on the confidence interval? Because the confidence interval limits include 0, it appears that the two rates of left-handedness are equal. There is not sufficient evidence to support the claim that the rate of left-handedness among males is less than that among females, c. Based on the results, is the rate of left-handedness among males less than the rate of left-handedness among females? O A. The rate of left-handedness among males does appear to be less than the rate of left-handedness among females because the results are statistically significant. B. The rate of left-handedness among males does not appear to be less than the rate of left-handedness among females. C. The rate of left-handedness among males does appear to be less than the rate of left-handedness among females because the results are not statistically significant. OD. The results are inconclusive. Ouestion is emplote
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