Question

In: Statistics and Probability

A simple random sample of size 33 has mean x = 14.3 . The population standard...

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 than

30

. 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 than

30

. 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 than

30

. The correct decision is to ▼(Choose one).

Solutions

Expert Solution

orchestra answered 2 years ago
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