Question

Decide whether the normal sampling distribution can be used. If it can be used, test the claim about the difference between two population proportions p 1 and p 2 at the given level of significance alpha using the given sample statistics. Assume the sample statistics are from independent random samples. Claim: p 1equalsp 2, alphaequals0.10 Sample statistics: x 1equals88, n 1equals171 and x 2equals172, n 2equals212

Answer #1

Decide whether the normal sampling distribution can be used. If
it can be used, test the claim about the difference between two
population proportions p 1 and p 2 at the given level of
significance alpha using the given sample statistics. Assume the
sample statistics are from independent random samples. Claim: p
1equalsp 2, alphaequals0.01 Sample statistics: x 1equals27, n
1equals129 and x 2equals32, n 2equals206 Can a normal sampling
distribution be used?

Decide whether the normal sampling distribution can be used. If
it can be used, test the claim about the difference between two
population proportions
p 1p1
and
p 2p2
at the given level of significance
alphaα
using the given sample statistics. Assume the sample statistics
are from independent random samples.
Claim:
p 1p1equals=p 2p2,
alphaαequals=0.010.01
Sample statistics:
x 1x1equals=2323,
n 1n1equals=113113
and
x 2x2equals=103103,
n 2n2equals=179179
a) find the standardized test statistics

Decide whether the normal sampling distribution can be used. If
it can be used, test the claim about the population proportion p
at the given level of significance alpha using the given sample
statistics. Claim: pnot equals0.29; alphaequals0.01; Sample
statistics: ModifyingAbove p with caretequals0.22, nequals150

Decide whether the normal sampling distribution can be used. If
it can be used, test the claim about the population proportion p
at the given level of significance alpha using the given sample
statistics. Claim: pnot equals0.24; alphaequals0.01; Sample
statistics: ModifyingAbove p with caretequals0.19, nequals200

Decide whether the normal sampling distribution can be used. If
it can be used, test the claim about the population proportion p
at the given level of significance
alphaα
using the given sample statistics.Claim:
pnot equals≠0.24;
alphaαequals=0.10;
Sample statistics:
ModifyingAbove p with caretpequals=0.21,
nequals=200
Can the normal sampling distribution be used?
state the null and alternative hypothesis.
determine the critical value.
find the z-test statistic.
what is the result of the test?
Reject
Upper H 0H0.
The data provide sufficient...

For the following information, determine whether a normal
sampling distribution can be used, where p is the population
proportion,α is the level of significance, ModifyingAbove p with
caretp is the sample proportion, and n is the sample size. If it
can be used, test the claim. Claim:
p>0.29
α=0.08
Sample statistics:
ModifyingAbove p with caretpequals=0.36
n=375

For the following information, determine whether a normal
sampling distribution can be used, where p is the population
proportion,
alphaα
is the level of significance,
ModifyingAbove p with caretp
is the sample proportion, and n is the sample size. If it can
be used, test the claim.Claim:
pgreater than or equals≥0.47
alphaαequals=0.06
Sample statistics:
ModifyingAbove p with caretpequals=0.40,
nequals=180

Determine whether the hypothesis test involves a sampling
distribution of means that is a normal distribution, Student t
distribution, or neither. Claim: ? = 119. Sample data: ? = 15, ?̅ =
103, ? = 15.2. The sample data, for this simple random sample,
appear to come from a normally distributed population with unknown
? and ?.

1) Determine whether the following hypothesis test involves a
sampling distribution of means that is a normal distribution,
Student t distribution, or neither.
Claim about IQ scores of statistics instructors: μ > 100.
Sample data: n = 15, x ¯= 118, s = 11.
The sample data appear to come from a normally distributed
population with unknown μand σ.
a) student T-distribution
b) Normal distribution
c) Neither
2)
Determine whether the following hypothesis test involves a
sampling distribution of means...

TRUE OR FALSE:
1. The sampling distribution of (X-bar) is
always a normal distribution according to the Central limit
theorem.
4. If the sampled population is a normal distribution, then the
sampling distribution of (X-bar is normal only for a
large enough sample size.
5. If p=.8 and n=50, then we can conclude that the sampling
distribution of the proportions is approximately a normal
distribution.
8. Assuming the same level of significancea, as the
sample size increases, the critical t-value...

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