Question
In: Statistics and Probability
Construct the indicated confidence interval for the difference between population proportions p1 - p2. Assume that...
Construct the indicated confidence interval for the difference between population proportions p1 - p2. Assume that the samples are independent and that they have been randomly selected.
4) x1 = 44, n1 = 64 and x2 = 50, n2 = 73; Construct a 95% confidence interval for the difference 4) between population proportions p1 - p2.
Solutions
orchestra answered 2 years agoRelated Solutions
a) If the confidence interval for the difference in population proportions p1 - p2 includes 0,...
a) If the confidence interval for the difference in population
proportions p1 - p2 includes 0, what does this imply?
b) If all the values of a confidence interval for two population
proportions are positive, then what does this imply?
c) If all the values of a confidence interval for two population
proportions are negative, then what does this imply?
d) Explain the difference between sampling with replacement and
sampling without replacement. Suppose you had the names of...
Construct the indicated confidence interval for the difference between the two population means. Assume that the...
Construct the indicated confidence interval for the difference
between the two population means.
Assume that the two samples are independent simple random samples
selected from normally
distributed populations. Do not assume that the population standard
deviations are equal. A paint
manufacturer wished to compare the drying times of two different
types of paint. Independent
simple random samples of 11 cans of type A and 9 cans of type B
were selected and applied to
similar surfaces. The drying times, in...
Construct the indicated confidence interval for the difference between the two population means. Assume that the...
Construct the indicated confidence interval for the difference
between the two population means. Assume that the two samples are
independent simple random samples selected from normally
distributed populations. Also assume that the population standard
deviations are equal (sigma1 = sigma2), so that the standard error
of the difference between means is obtained by pooling the sample
variances. A paint manufacturer wanted to compare the drying times
of two different types of paint. Independent simple random samples
of 11 cans of...
Construct the indicated confidence interval for the difference between the two population means.
Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Independent samples from two different populations yield the following data. The sample size is 478 for both samples. Find the \(85 \%\) confidence interval for \(\mu_{1}-\mu_{2}\).
\(\bar{x}_{1}=958, \bar{x}_{2}=157, s_{1}=77, s_{2}=88\)
A. \(800<\mu_{1}-\mu_{2}<802\)
B. \(791<\mu_{1}-\mu_{2}<811\)
C. \(793<\mu_{1}-\mu_{2}<809\)
D. \(781<\mu_{1}-\mu_{2}<821\)
a) Use the normal distribution to find a confidence interval for a difference in proportions p1-p2...
a) Use the normal distribution to find a confidence interval for
a difference in proportions p1-p2 given the relevant sample
results. Assume the results come from random samples.
A 99% confidence interval for p1-p2 given that p^1=0.76 with
n1=590 and p^2=0.67 with n2=260
Give the best estimate for p1-p2, the margin of error, and the
confidence interval.
Round your answer for the best estimate to two decimal places and
round your answers for the margin of error and the confidence...
If a 95% confidence interval for two population proportions p1-p2 is a range of positive numbers,...
If a 95% confidence interval for two population proportions
p1-p2 is a range of positive numbers, then what does this
imply?
a) The relative size of the population proportions cannot be
determined
b)With 95% confidence, there is no difference in the
population proportions.
c) With 95% confidence, the first population proportion is
greater than the second.
d) With 95% confidence, the first population proportion is
less than the second.
A 95% confidence interval for a difference in proportions p1-p2 if the samples have n1=60 with...
A 95% confidence interval for a difference in proportions p1-p2
if the samples have n1=60 with p^1=0.69 and n2=60 with p^2=0.56,
and the standard error is SE=0.09.
Construct a confidence Interval for p1- p2, at a 95% level of confidence, if x1= 366,...
Construct a confidence Interval for p1-
p2, at a 95% level of confidence, if x1= 366,
n1=535, x2=435, n2=593
construct the indicated confidence interval for the population mean using the t distribution. Assume the population...
construct the indicated confidence interval for the population
mean using the t distribution. Assume the population js normally
distributed. c=0.99, x=12.1,s=0.76,n=17
Construct the indicated confidence interval for the population mean mu using the t-distribution. Assume the population...
Construct the indicated confidence interval for the population
mean mu using the t-distribution. Assume the population is
normally distributed.
c=0.99, x bar=12.2, s=3.0, n=9
(?, ?)
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