Question
In: Statistics and Probability
Calculate the 95% confidence interval for the difference (mu1-mu2) of two population means given the following...
Calculate the 95% confidence interval for the difference (mu1-mu2) of two population means given the following sampling results. Population 1: sample size = 14, sample mean = 12.96, sample standard deviation = 1.38. Population 2: sample size = 12, sample mean = 2.55, sample standard deviation = 1.05.
Solutions
orchestra answered 1 year agoRelated Solutions
Calculate the 99% confidence interval for the difference (mu1-mu2) of two population means given the following...
Calculate the 99% confidence interval for the difference
(mu1-mu2) of two population means given the following sampling
results. Population 1: sample size = 12, sample mean = 20.36,
sample standard deviation = 0.57. Population 2: sample size = 7,
sample mean = 16.32, sample standard deviation = 0.85.
Your answer:
2.87 < mu1-mu2 < 5.22
3.86 < mu1-mu2 < 4.22
3.42 < mu1-mu2 < 4.67
2.61 < mu1-mu2 < 5.47
3.17 < mu1-mu2 < 4.91
3.39 < mu1-mu2 < 4.70...
Determine the 95% confidence interval for the difference between two population means where sample 1 has...
Determine the 95% confidence interval for the difference between
two population means where sample 1 has data: 16, 14, 19, 18, 19,
20, 15, 18, 17, 18, and sample 2 has data: 13, 19, 14, 17, 21, 14,
15, 10, 13, 15. (Assume equal population variances)
Calculate the two-sided 95% confidence interval for the population standard deviation (sigma) given that a sample...
Calculate the two-sided 95% confidence interval for the
population standard deviation (sigma) given that a sample of size
n=8 yields a sample standard deviation of 7.96.
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. \(781<\mu_{1}-\mu_{2}<821\)
In constructing 95% confidence interval estimate for the difference between the means of two populations, where...
In constructing 95% confidence interval estimate for the
difference between the means of two populations, where the unknown
population variances are assumed not to be equal, summary
statistics computed from two independent samples are:
?1=45,?̅1=756,?1=18,?2=40,?̅2=762,?2=15
(using 2-sample T menu)
a. Calculate the 95% confidence interval for the true difference
of two means.
b. Base on the interval in the previous question, can one
conclude there is a difference in means of two populations?
Justify your answer.
Describe a confidence interval for the difference in means between two population by stating 1. a...
Describe a confidence interval for the difference in means
between two population by stating 1. a pair of populations composed
of the same type of individuals and a quantitative variable on
those populations, 2. sizes and degrees of freedom of samples from
those populations, 3. the means of those samples, and 4. the
standard deviations of those samples. Then state 5. a confidence
level and find 6. find the interval. Finally, perform a test of
significance concerning the difference 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. 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...
1. Confidence interval for the difference between the two population means. (Assume that the two samples...
1. 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.)
A researcher was interested in comparing the GPAs of students at
two different colleges. Independent simple random samples of 8
students from college A and 13 students from college B yielded the
following summary statistics:
College A
College B
= 3.1125
= 3.4385
s1 = 0.4357
s2 = 0.5485
n1 = 8
n2 =...
Find a 95% confidence interval for the difference of two means when you have independent samples,...
Find a 95% confidence interval for the difference of two means
when you have independent samples, both of size 36, from two
populations, in which the variances are not known to be equal. In
this case, n1=36, s12=8.2, the
first sample mean is equal to 7.9; n2 =36,
s22=10.4, the second sample mean is equal to
9.1
Interpret the interval once you find it. Namely, can you
conclude one mean is greater than the other mean and if so, which...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Case Study: Personal Beliefs in the Workplace Don Shakow was a prominent professional who worked in...
- 1: Competency framework usage is the modern best practice in management. What is meant by competency...
- A 19.34 g mixture of sugar (C12H22O11) and table salt (NaCl) is dissolved in 231 g...
- Young and Company claims that its pressurized diving bell will, on average, maintain its integrity to...
- 1) Alternative compiled code sequence using instructions in classes A, B, C. What is the average...
- An asset is purchased on January 1 for $48,700. It is expected to have a useful...
- Do we have any online or offline tool to convert c and cpp programs into MIPS...
ADVERTISEMENT