Question

Assume that a sample is used to estimate a population mean μ μ . Find the 90% confidence interval for a sample of size 485 with a mean of 63.9 and a standard deviation of 13.1. Enter your answers accurate to four decimal places. Confidence Interval = ( , )

LicenseQuestion 18. Points possible: 1 Unlimited attempts. Post this question to forum Incorrect but can retry You measure 50 textbooks' weights, and find they have a mean weight of 75 ounces. Assume the population standard deviation is 14.3 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight. Keep 4 decimal places of accuracy in any calculations you do. Report your answers to four decimal places. Confidence Interval = (，）

Answer #1

Assume that a sample is used to estimate a population mean μ .
Find the 80% confidence interval for a sample of size 508 with a
mean of 42.7 and a standard deviation of 20.4. Enter your answers
accurate to four decimal places. Confidence Interval

Assume that a sample is used to estimate a population mean μ μ .
Find the margin of error M.E. that corresponds to a sample of size
10 with a mean of 17.7 and a standard deviation of 17.6 at a
confidence level of 99.8%. Report ME accurate to one decimal place
because the sample statistics are presented with this accuracy.
M.E. =

Assume that a sample is used to estimate a population mean μ μ .
Find the 99.5% confidence interval for a sample of size 36 with a
mean of 41.5 and a standard deviation of 15.2. Enter your answer as
an open-interval (i.e., parentheses) accurate to 3 decimal places.
99.5% C.I. = The answer should be obtained without any preliminary
rounding.

Assume that a sample is used to estimate a population mean μ .
Find the 99.5% confidence interval for a sample of size 279 with a
mean of 56.9 and a standard deviation of 11.5. Enter your answer as
a tri-linear inequality accurate to 3 decimal places. < μ

Assume that a sample is used to estimate a population mean μ.
Find the 99% confidence interval for a sample of size 1107 with a
mean of 32.4 and a standard deviation of 19.7. Enter your answer as
a tri-linear inequality accurate to 3 decimal places.
< μ <

Assume that a sample is used to estimate a population mean μ.
Find the 99% confidence interval for a sample of size 45 with a
mean of 20.1 and a standard deviation of 11.1. Enter your answer as
an open-interval (i.e., parentheses)
accurate to 3 decimal places.
99% C.I. =

Assume that a sample is used to estimate a population mean μ.
Find the 99% confidence interval for a sample of size 46 with a
mean of 47.2 and a standard deviation of 16.3. Enter your answer as
an open-interval (i.e., parentheses)
accurate to 3 decimal places.
99% C.I. =

Assume that a sample is used to estimate a population mean μ.
Find the 90% confidence interval for a sample of size 1094 with a
mean of 82.5 and a standard deviation of 21.4. Enter your answer as
a tri-linear inequality accurate to 3 decimal places.

Assume that a sample is used to estimate a population mean μ .
Find the 99% confidence interval for a sample of size 64 with a
mean of 53.2 and a standard deviation of 6.6. Enter your answer as
an open-interval (i.e., parentheses) accurate to 3 decimal places.
99% C.I. =
The answer should be obtained without any preliminary
rounding.

Assume that a sample is used to estimate a population mean μ .
Find the 99.5% confidence interval for a sample of size 890 with a
mean of 37.2 and a standard deviation of 7.6. Enter your answer as
a tri-linear inequality accurate to one decimal place (because the
sample statistics are reported accurate to one decimal place).

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