9. If a sample of size 64 is drawn from a population with a standard deviation...

9. If a sample of size 64 is drawn from a population with a standard deviation of 80,
the standard deviation of sample means would equal _______.
A. 10.000
B. 1.250
C. 0.125
D. 0.800

Solutions

Expert Solution

Ans: 10.000

Explanation:

Standard deviation of sample means = SD /

= 80 /

= 80 / 8

= 10

Rahul Sunny answered 1 year ago

Next > < Previous

Related Solutions

A sample of size n =52 is drawn from a normal population whose standard deviation is...

A sample of size n =52 is drawn from a normal population whose standard deviation is σ=7.9. The sample mean is x=43.78 (a) Construct a 80% confidence interval for μ. Round the answer to at least two decimal places.. (b) If the population were not approximately normal, would the confidence interval constructed in part (a) be valid? Is the sample large?

A sample of size n equals 76 is drawn from a population whose standard deviation is...

A sample of size n equals 76 is drawn from a population whose standard deviation is o equals 27 A) Find the margin of error for a 99% confidence interval for U. Round the answer to at least three decimal places. B) if the confidence level were 95%, would the margin of error be larger or smaller? _______ because the confidence level is _______

A sample of size =n66 is drawn from a normal population whose standard deviation is =σ8.9....

A sample of size =n66 is drawn from a normal population whose standard deviation is =σ8.9. The sample mean is =x50.35. Part 1 of 2 ( a) Construct a 98% confidence interval for μ. Round the answer to at least two decimal places. A 98% confidence interval for the mean is <μ< P(b) If the population were not approximately normal, would the confidence interval constructed in part (a) be valid? Explain. The confidence interval constructed in part (a) ▼(Choose one)(would...

A sample of size =n72 is drawn from a population whose standard deviation is =σ25. Part...

A sample of size =n72 is drawn from a population whose standard deviation is =σ25. Part 1 of 2 (a) Find the margin of error for a 95% confidence interval for μ. Round the answer to at least three decimal places. The margin of error for a 95% confidence interval for μ is . Part 2 of 2 (b) If the sample size were =n89, would the margin of error be larger or smaller? ▼(Choose one) , because the sample...

For a random sample of size 64 from a population with mu=24 and standard deviation sigma=1.5....

For a random sample of size 64 from a population with mu=24 and standard deviation sigma=1.5. State the center, variation, and shape of the sampling distribution for samples of size 64. Justify your answer. Find the probability that the sample mean exceeds 24.3. Draw a fully labeled picture that illustrates the probability, and write down your answer using probability notation.

A sample size of n=100 is drawn from a population whose standard deviation is =3.8 Find...

A sample size of n=100 is drawn from a population whose standard deviation is =3.8 Find the margin of error for a 95% confidence level.

19. A sample of 64 elements from a population with a standard deviation of 48 is...

19. A sample of 64 elements from a population with a standard deviation of 48 is selected. The sample mean is 170. You are asked to construct a 95% confidence interval for μ. The lower bound (or lower limit) for that interval is . . . (NOTE: Round your final answer to 2 decimal places - such as 14.12 or 31.00 or 99.55) 10. A local electronics firm wants to determine their average daily sales (in dollars.) A sample of...

A sample of size 82 will be drawn from a population with mean 24 and standard...

A sample of size 82 will be drawn from a population with mean 24 and standard deviation 9. Would it be unusual if the sample mean was greater than 27? Why or Why not?

A sample of size 42 will be drawn from a population with mean 52 and standard...

A sample of size 42 will be drawn from a population with mean 52 and standard deviation 11. (a) Is it appropriate to use the normal distribution to find probabilities for x(bar)? (b) If appropriate find the probability that x(bar) will be between 53 and 54. Round the answer to at least four decimal places. (c) If appropriate find the 46th percentile of x(bar). Round the answer to at least two decimal places.

A sample of size 75 will be drawn from a population with mean 35 and standard...

A sample of size 75 will be drawn from a population with mean 35 and standard deviation 10.Use the Cumulative Normal Distribution Table if needed. 1) Find the probability that mean=x will be greater than 32. Round the final answer to at least four decimal places. 2) Find the 65th percentile of mean=x. Round the answer to at least two decimal places.

Subjects