m*****8
发帖数: 27 | 1 in a survey, 344 of 1170 subjects said "yes".
a. Estimate the population proportion who would say "yes".
b. Conduct a significance test to determine whether a majority or minority
of the population would say "yes". Report and interpret the P-value.
我这样做对么？
a. 344/1170? If this is true,just use sample proportion to estimate
population proportion？That's it?
b. Ho:p>=50%, H1:p<50%,
z=(344/1170-50%)/【(1-50%)*50%/1170】^-0.5 = -14< -1.96,
so reject Ho,so minority of population would say yes,is that co | s*****n
发帖数: 2174 | | l*******f
发帖数: 243 | 3 a. yes, phat to estimate population proportion
b.You didn't calculate the P value yet, though your solution sounds right. | m*****8
发帖数: 27 | 4 怎么计算p-value啊，z statistic已经是-14了，表里根本没有-14啊。。。
【在 l*******f 的大作中提到】
: a. yes, phat to estimate population proportion
: b.You didn't calculate the P value yet, though your solution sounds right.
| l*******f
发帖数: 243 | 5 个人认为可以找表里最小的一个值， 然后你的Pvalue<该值，
结论： 因为Pvalue<该值<0.05(whatever your alpha level is)，reject null and
conclude`````` |
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