Question

A population has a mean of 400 and a standard deviation of 90. Suppose a sample of 100 size is selected and x bar is used to estimate mu. Use z-table.

a. What is the probability that the sample mean will be within +- 4 of the population mean (to 4 decimals)?

b. What is the probability that the sample mean will be within +- 16 of the population mean (to 4 decimals)?

Answer #1

A population has a mean of 400 and a standard deviation of 90.
Suppose a sample of size 100 is selected and x with bar on top is
used to estimate mu. What is the probability that the sample mean
will be within +/- 3 of the population mean (to 4 decimals)? (Round
z value in intermediate calculations to 2 decimal places.) What is
the probability that the sample mean will be within +/- 14 of the
population mean (to...

A population has a mean of 400 and a standard deviation of 60.
Suppose a sample of size 100 is selected and is used to
estimate . Use z-table.
What is the probability that the sample mean will be within +/-
4 of the population mean (to 4 decimals)? (Round z value
in intermediate calculations to 2 decimal places.)
What is the probability that the sample mean will be within +/-
16 of the population mean (to 4 decimals)? (Round z...

A population has a mean of 400 and a standard deviation of 90.
Suppose a sample of size 125 is selected and is used to
estimate . Use z-table.
What is the probability that the sample mean will be within +/-
8 of the population mean (to 4 decimals)? (Round z value
in intermediate calculations to 2 decimal places.)
What is the probability that the sample mean will be within +/-
14 of the population mean (to 4 decimals)? (Round...

A population has a mean of 200 and a standard deviation of 90.
Suppose a sample of size 125 is selected and is used to estimate .
Use z-table.
a. What is the probability that the sample mean will be within
+/- 9 of the population mean (to 4 decimals)? (Round z value in
intermediate calculations to 2 decimal places.) b. What is the
probability that the sample mean will be within +/- 11 of the
population mean (to 4...

A population has a mean of 200 and a standard deviation of 50.
Suppose a sample of size 100 is selected and is used to estimate .
Use z-table. What is the probability that the sample mean will be
within +/- 4 of the population mean (to 4 decimals)? (Round z value
in intermediate calculations to 2 decimal places.) What is the
probability that the sample mean will be within +/- 11 of the
population mean (to 4 decimals)? (Round...

A population has a mean of 200 and a standard deviation of 80.
Suppose a sample of size 100 is selected and is used to estimate .
Use z-table. What is the probability that the sample mean will be
within +/- 4 of the population mean (to 4 decimals)? (Round z value
in intermediate calculations to 2 decimal places.) What is the
probability that the sample mean will be within +/- 13 of the
population mean (to 4 decimals)? (Round...

A population has a mean of 300 and a standard deviation of 60.
Suppose a sample of size 100 is selected and is used to estimate .
Use z-table.
What is the probability that the sample mean will be within +/-
4 of the population mean (to 4 decimals)? (Round z value in
intermediate calculations to 2 decimal places.)
What is the probability that the sample mean will be within +/-
15 of the population mean (to 4 decimals)? (Round...

A population has a mean of 200 and a standard deviation of 60.
Suppose a sample of size 100 is selected and is used to
estimate . Use z-table.
What is the probability that the sample mean will be within +/-
6 of the population mean (to 4 decimals)? (Round z value
in intermediate calculations to 2 decimal places.)
What is the probability that the sample mean will be within +/-
17 of the population mean (to 4 decimals)? (Round z...

A population has a mean of 300 and a standard deviation of 70.
Suppose a sample of size 100 is selected and is used to
estimate . Use z-table.
What is the probability that the sample mean will be within +/-
8 of the population mean (to 4 decimals)? (Round z value
in intermediate calculations to 2 decimal places.)
What is the probability that the sample mean will be within +/-
18 of the population mean (to 4 decimals)? (Round z...

A population has a mean of 300 and a standard deviation of 70.
Suppose a sample of size 100 is selected and is used to
estimate . Use z-table.
A. What is the probability that the sample mean will be within
+/- 8 of the population mean (to 4 decimals)? (Round z
value in intermediate calculations to 2 decimal places.)
B. What is the probability that the sample mean will be within
+/- 10 of the population mean (to 4 decimals)?...

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