Consider the sample 65, 59, 60, 44, 27, 43, 41, 30, 57, 52 from a normal population with population mean μ and population variance σ2. Find the 95% confidence interval for μ.
a)
47.8±9.14
b)
47.8±10.54
c)
47.8±11.12
d)
47.8±10.21
e)
47.8±9.25
Suppose x = 30, s=7 and n=200. What is the 95% confidence interval for μ.
a)
19.60<μ<20.40
b)
19.43<μ<20.57
c)
19.09<μ<20.91
d)
19.72<μ<20.28
e)
29.03<μ<30.97
Consider the sample 111, 103, 112, 104, 99, 105, 98, 113 from a normal population with population mean μ and population variance σ2. Find the 95% confidence interval for μ.
a)
105.63±4.85
b)
105.63±10.33
c)
105.63±9.54
d)
105.63±5.78
e)
105.63±9.28
Consider the sample 53, 32, 49, 31, 51, 45, 58, 63 from a normal population with population mean μ and population variance σ2. Find the 95% confidence interval for μ.
a)
47.750± 8.7584
b)
47.750± 7.7294
c)
47.750± 7.5284
d)
47.750± 9.5519
e)
47.750± 9.3402
Suppose x1,...,xn is a sample of successes and failures from a Bernoulli population with probability of success p. Let ∑x=288 with n=470. Then a 80% confidence interval for p is:
a)
.6128 ± .0129
b)
.6128 ± .0434
c)
.6128 ± .0432
d)
.6128 ± .0564
e)
.6128 ± .0288