Question

Find the minimum sample size n needed to estimate mu for the given values of c, sigma and E.

c=0.95, sigma=8.3 and E=2

Assume that the preliminary sample has at least 30 members. n=?

Answer #1

We have given here,

Population standard deviation = 8.3

Margin of error =E=2

Level of significance =1-0.95=0.05

Z critical value is (by using Z table)=1.96

Sample size formula is

=66.16

Therefore, sample size approximately will be 67

Find the minimum sample size n needed to estimate mu for the
given values of c, sigma, and E. c=0.98, sigma=8.9, and E=2
Assume that a preliminary sample has at least 30 members.

Find the minimum sample size n needed to estimate mu for the
given values of c, sigma, and E. cequals0.95, sigmaequals7.7,
and Eequals2 Assume that a preliminary sample has at least 30
members.

Find the minimum sample size n needed to estimate
muμ
for the given values of c,
sigmaσ,
and E.
cequals=0.95
sigmaσequals=8.2
and
Eequals=1
Assume that a preliminary sample has at least 30 members.

Find the minimum sample size n needed to estimate μ for the
given values of c, σ, and E.
c=0.95, σ=7.5, and E=11
Assume that a preliminary sample has at least 30 members.
n= ?
(Round up to the nearest whole number.)

Find the minimum sample size n needed to estimate μ For the
given values of c, σ, and E. c=0.98 σ=8.7,and E=2 Assume that a
preliminary sample has at least 30 members. n= Round up to the
nearest whole number.)

Find the minimum sample size n needed to estimate
muμ
for the given values of c,
sigmaσ,
and E.
cequals=0.980.98,
sigmaσequals=5.45.4,
and
Eequals=22
Assume that a preliminary sample has at least 30 members.
nequals=
(Round up to the nearest whole number.)

Estimate the minimum sample size needed to achieve the margin of
error E=0.013 The minimum sample size is _____ (Round to the
nearest integer)

Find the sample size, n, needed to estimate the mean of
a normal population, μ, with σ = 9.25 and a maximum error
of E = 3.2 at a 99% level of confidence.

Find the minimum sample size n necessary to estimate a
population proportion p with a 95% confidence interval that has a
margin of error m = 0.03.

Show All Work
Use the given data to find the minimum sample size required to
estimate the population proportion.
Margin of error: 0.028; confidence level: 99%; p ̂ and q ̂
unknown.
b. Recalculate the sample size needed for p ̂=0.27

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