Hey the correct answer is given for both, but can you please do the steps on...
Hey the correct answer is given for both, but can you please do the steps on how to get to the answer, Im confused on how to solve? Thank you!
3. At least what sample size is necessary in order to obtain a 90% confidence interval of length 6, when SD = 10? A. 8 B. 16 C. 60 D. 15 E. 61 Answer: E
4. With which combination of confidence level and sample size will the corresponding confidence interval be largest? A. 90%, n = 25 B. 99%, n = 50 C. 80%, n = 20 D. 95%, n = 25 E. 98%, n = 50 Answer: D
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Hey the correct answer is given for both, but can you please do
the steps on...
PLEASE ANSWER ALL PARTS. says theres 5 parts remaining. if you know the parts please answer...
PLEASE ANSWER ALL PARTS. says theres 5 parts remaining. if you
know the parts please answer them. thank you
Score: 0 of 1 pt 4 of 4 (2 complete) 9.2.19-T A simple random sample of siren is drawn from a population that is normally distributed. The sample mean, is found to be 16.7, and the sample standard deviation, s, is found to be 42 (a) Construct a 98% confidence interval about if the sample size, n, is 34 (b) Construct...
You collect a random sample of size n from a population and calculate a 98% confidence...
You collect a random sample of size n from a population and calculate a 98% confidence interval. Which of the following strategies produces a new confidence interval with a decreased margin of error? A.) Use a 99% Confidence level B.)Use a 95% confidence level C.)Decrease Sample Size D.)Use the same confidence level but compute the interval n time. Approximately 2% of these intervals will be larger. E.)Nothing can guarantee that you will obtain a larger margin of error. You can...
Hi I'm wondering if you can help me with this question please? Thanks! Suppose we would...
Hi
I'm wondering if you can help me with this question please? Thanks!
Suppose we would like to make a confidence interval for the proportion of Americans who support "gun control Which of the following statements is TRUE? Select one: O a. The exact probability that a confidence interval contains the population proportion is always higher for a 95% confidence interval than a 90% confidence interval. Cross out o b . A 90% confidence interval obtained from a random sample...
Please show the process................................. 11. Which of the following conditions does not allow you to use...
Please show the process.................................
11. Which of the following conditions does not allow you to use the formula Xtza to estimate u? a. b. C. d. Population is normally distributed and the population variance is known. Population is not normally distributed but n is large; population variance is known. Population has any distribution and n is any size. All of these choices allow you to use the formula 12. The larger the confidence level, the a. smaller the value of...
92.19-T Question Help A simple random sample of size n is drawn from a population that...
92.19-T Question Help A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 18.3, and the sample standard deviation s, is found to be 5.6. (a) Construct a 90% confidence interval about if the sample size, n, is 31. (b) Construct a 90% confidence interval about μ if the sample size, n' is 61 . How does increasing the sample size affect the margin of error,...
please show how its done on TI-64 1. SAT scores are distributed with a mean of...
please show how its done on TI-64 1. SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested in estimating the average SAT score of first year students at your college. If you would like to limit the margin of error of your 95% confidence interval to 25 points, how many students should you sample? 3. If n=31, ¯xx¯(x-bar)=36, and s=6, construct a confidence interval at a 98% confidence level. Assume the...
Please Help with BOTH 1) 2) A CI is desired for the true average stray-load loss...
Please Help with BOTH
1)
2)
A CI is desired for the true average stray-load loss u (watts) for a certain type of induction motor when the line current is held at 10 amps for a speed of 1500 rpm. Assume that stray-load loss is normally distributed with o = 2.6. (Round your answers to two decimal places.) (a) Compute a 95% CI for u when n = 25 and x = 53.0. 1 watts (b) Compute a 95% CI...
For the following sample sizes and confidence levels, find the t-values suitable for building confidence intervals:...
For the following sample sizes and confidence levels, find the t-values suitable for building confidence intervals: a) n = 15; 90%. b) n = 6; 95%. c) n = 19; 99%. d) n = 25; 98%. e) n = 10; 99%. f) n = 41; 90%.
Suppose you have selected a random sample of n=9 measurements from a normal distribution. Compare the...
Suppose you have selected a random sample of n=9 measurements from a normal distribution. Compare the standard normal zz= values with the corresponding t values if you were forming the following confidence intervals. (a) 98% confidence interval z= t= (b) 95% confidence interval z= t= (c) 99% confidence interval z= t=
a. Find a 95% confidence interval for μ. b. What do you mean when you say...
a. Find a 95% confidence interval for μ.
b. What do you mean when you say that a confidence coefficient
is .90?
c. Find a 99% confidence interval for μ.
d. What happens to the width of a confidence interval as the
value of the confidence coefficient is increased while the sample
size is held fixed?
e. Would your confidence intervals of parts a and c be valid if
the distribution of the original population were not normal?
Explain.
A...
PLEASE ANSWER ALL PARTS. says theres 5 parts remaining. if you
know the parts please answer them. thank you
Score: 0 of 1 pt 4 of 4 (2 complete) 9.2.19-T A simple random sample of siren is drawn from a population that is normally distributed. The sample mean, is found to be 16.7, and the sample standard deviation, s, is found to be 42 (a) Construct a 98% confidence interval about if the sample size, n, is 34 (b) Construct...
Hi
I'm wondering if you can help me with this question please? Thanks!
Suppose we would like to make a confidence interval for the proportion of Americans who support "gun control Which of the following statements is TRUE? Select one: O a. The exact probability that a confidence interval contains the population proportion is always higher for a 95% confidence interval than a 90% confidence interval. Cross out o b . A 90% confidence interval obtained from a random sample...
Please show the process.................................
11. Which of the following conditions does not allow you to use the formula Xtza to estimate u? a. b. C. d. Population is normally distributed and the population variance is known. Population is not normally distributed but n is large; population variance is known. Population has any distribution and n is any size. All of these choices allow you to use the formula 12. The larger the confidence level, the a. smaller the value of...
92.19-T Question Help A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 18.3, and the sample standard deviation s, is found to be 5.6. (a) Construct a 90% confidence interval about if the sample size, n, is 31. (b) Construct a 90% confidence interval about μ if the sample size, n' is 61 . How does increasing the sample size affect the margin of error,...
Please Help with BOTH
1)
2)
A CI is desired for the true average stray-load loss u (watts) for a certain type of induction motor when the line current is held at 10 amps for a speed of 1500 rpm. Assume that stray-load loss is normally distributed with o = 2.6. (Round your answers to two decimal places.) (a) Compute a 95% CI for u when n = 25 and x = 53.0. 1 watts (b) Compute a 95% CI...
a. Find a 95% confidence interval for μ.
b. What do you mean when you say that a confidence coefficient
is .90?
c. Find a 99% confidence interval for μ.
d. What happens to the width of a confidence interval as the
value of the confidence coefficient is increased while the sample
size is held fixed?
e. Would your confidence intervals of parts a and c be valid if
the distribution of the original population were not normal?
Explain.
A...
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