, WIIEPeas 924 of 1100 drivers old, 5-69 years old said that they did. At the 1%
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, WIIEPeas 924 of 1100 drivers old, 5-69 years old said that they did. At the 1%significance level, do the vide sufficient evidence to conclude that there is a difference ars Heal ther seat-belt use between the two age groups? in seat-belt the 10 Ballistic Fingerprinting. Guns make unique markings on bullets they fire and their shell casings. These markings are called bhallistic fingerprints. An ABCNEWS Poll examined the opinions of Americans on the enactment of a law .. that would require every gun sold in the United States to be test-fired first, so law enforce- ment would have its fingerprint in case it were ever used in a crime." The following problem is based on the results of that poll. Indepen- dent simple random samples were taken of 537 women and 495 men. When asked whether they support a ballistic fingerprinting law, 446 of the women and 307 of the men said "yes." At the 1% significance level, do the data provide sufficient evidence to conclude that women 12110 grou diag a. b. I 12.1 tend to favor ballistic fingerprinting more than men? Body Mass Index. Body mass index (BMI) is a measure fat based on height and weight. According to the document idelines for Americans, published by the U.S. Department nom labo le r won of thExplanation / Answer
Given that,
sample one, x1 =446, n1 =537, p1= x1/n1=0.831
sample two, x2 =307, n2 =495, p2= x2/n2=0.62
null, Ho: p1 < p2
alternate, H1: p1 > p2
level of significance, = 0.01
from standard normal table,right tailed z /2 =2.326
since our test is right-tailed
reject Ho, if zo > 2.326
we use test statistic (z) = (p1-p2)/(p^q^(1/n1+1/n2))
zo =(0.831-0.62)/sqrt((0.73*0.27(1/537+1/495))
zo =7.601
| zo | =7.601
critical value
the value of |z | at los 0.01% is 2.326
we got |zo| =7.601 & | z | =2.326
make decision
hence value of | zo | > | z | and here we reject Ho
p-value: right tail - Ha : ( p > 7.6006 ) = 0
hence value of p0.01 > 0,here we reject Ho
ANSWERS
---------------
null, Ho: p1 = p2
alternate, H1: p1 > p2
test statistic: 7.601
critical value: 2.326
decision: reject Ho
p-value: 0
data provide suffcient evidence to conclude that women tend to favor
more than men
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