Suppose x1,...,xn is a sample of successes and failures from a Bernoulli population with probability of success p. Let ∑x=297 with n=440. Then a 85% confidence interval for p is:
a)
.675 ± .0689
b)
.675 ± .0393
c)
.675 ± .0322
d)
.675 ± .0582
e)
.675 ± .0589
Suppose x = 30, s=5 and n=190. What is the 95% confidence interval for μ.
a)
29.25<μ<30.75
b)
19.43<μ<20.57
c)
29.29<μ<30.71
d)
29.20<μ<30.80
e)
19.36<μ<20.63
Suppose x = 30, s=8 and n=55. What is the 90% confidence interval for μ.
a)
28.23<μ<31.77
b)
19.60<μ<20.40
c)
14.20<μ<2540
d)
14.46<μ<25.54
e)
19.77<μ<20.23
Suppose x1,...,xn is a sample of successes and failures from a Bernoulli population with probability of success p. Let ∑x=270 with n=400. Then a 75% confidence interval for p is:
Please choose the best answer.
a)
.675 ± .0288
b)
.675 ± .0258
c)
.675 ± .0269
d)
.675 ± .037
e)
.675 ± .0323
Suppose x1,...,xn is a sample of successes and failures from a Bernoulli population with probability of success p. Let ∑x=290 with n=400. Then a 95% confidence interval for p is:
a)
.725 ± .0574
b)
.725 ± .0414
c)
.725 ± .0438
d)
.725 ± .0444
e)
.725 ± .0434