SOLUTION: in a gallup poll, 1025 randomly selected adults were surveyed and 29% of them said that they used the internet for shopping at least twice a year.
a)find the point estimate of th
Algebra ->
Probability-and-statistics
-> SOLUTION: in a gallup poll, 1025 randomly selected adults were surveyed and 29% of them said that they used the internet for shopping at least twice a year.
a)find the point estimate of th
Log On
Question 861790: in a gallup poll, 1025 randomly selected adults were surveyed and 29% of them said that they used the internet for shopping at least twice a year.
a)find the point estimate of the percentage of adults who use the internet for shopping?
b)Find a 99% confidence interval estimate of the percentage of adults who use the internet for shopping?
Hi,
a) for P(x ≥ 2) TI syntax is 1 – binomcdf(n, p, largest x-value).
P(x ≥ 2) = 1 - binomcdf(1025,.29,1)
b) = 297.25 is the mean
ME =
CI: 297.25-ME < u < 297.25 + ME
CI z -value
90% z =1.645
92% z = 1.751
95% z = 1.96
98% z = 2.326
99% z = 2.576
