In: Statistics and Probability
A simple random sample of size
33
has mean
x
=
14.3
. The population standard deviation is σ
=
3.72
. Can you conclude that the population mean differs from
10
?
The population standard deviation
▼(Choose one) known. The sample size
n ▼(Choose one) greater than30 . The correct decision is to ▼(Choose one). |
Part 2 of 3
A simple random sample of size
13
has mean
x
=
7.26
and the standard deviation is
s
=
1.9
. The population is not approximately normal. Can you conclude that the population mean is less than
9
?
The population standard deviation
▼(Choose one) known. The sample size
n ▼(Choose one) greater than30 . The population ▼(Choose one) approximately normal. The correct decision is to ▼(Choose one). |
Part 3 of 3
A simple random sample of size
33
has mean
x
=
41.8
and standard deviation
s
=
1.9
. The population is approximately normally distributed. Can you conclude that the population mean differs from
40
?
The population standard deviation
▼(Choose one) known. The sample size
n ▼(Choose one) greater than30 . The correct decision is to ▼(Choose one). |