A population has parameters u = 73.3 and o = 6.3 You intend to draw a random sample of size n = 24 What is the mean of the distribution of sample means? What is the standard deviation of the distribution of sample means? (Round to 3 decimal places.)

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A population has parameters H =
You intend to draw a random sample of size n =
73.3 and o =
6.3.
244
%3D
What is the mean of the distribution of sample
means?
What is the standard deviation of the distribution of
sample means?
(Round to 3 decimal places.)
Transcribed Image Text:A population has parameters H = You intend to draw a random sample of size n = 73.3 and o = 6.3. 244 %3D What is the mean of the distribution of sample means? What is the standard deviation of the distribution of sample means? (Round to 3 decimal places.)
A commonly cited standard for one-way length
(duration) of school bus rides for elementary school
children is 30 minutes. A local government office
randomly samples 120 elementary school children in
their district and finds an average one-way commute
time of 27 minutes with a standard deviation of 4
minutes.
Which of the following is the correct set of
hypotheses for testing if an official wants to know
whether or not the mean commute time of
elementary school students in this district is actually
less than the commonly cited standard of 30
minutes?
Ho: µ s 30; HA: H > 30
|Ho: H = 27; HẠ: µ < 27
|Ho: H = 30; HA: ã = 27
%3D
Ho: H 2 30; HA: H < 30
|Ho: H = 30; HA:H = 30
%3D
Transcribed Image Text:A commonly cited standard for one-way length (duration) of school bus rides for elementary school children is 30 minutes. A local government office randomly samples 120 elementary school children in their district and finds an average one-way commute time of 27 minutes with a standard deviation of 4 minutes. Which of the following is the correct set of hypotheses for testing if an official wants to know whether or not the mean commute time of elementary school students in this district is actually less than the commonly cited standard of 30 minutes? Ho: µ s 30; HA: H > 30 |Ho: H = 27; HẠ: µ < 27 |Ho: H = 30; HA: ã = 27 %3D Ho: H 2 30; HA: H < 30 |Ho: H = 30; HA:H = 30 %3D
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