270604.2179714.qx3zay7 Jump to level 1 Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 5 inches. The heights of 7 randomly selected students are 73, 75, 62, 74, 62, 71 and 60. T = Ex: 12.34 C Margin of error at 99% confidence level = Ex: 1.23 99% confidence interval = [ Ex: 12.34 Ex: 12.34 O ] [smaller value, larger value]

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CHALLENGE
6.2.1: Confidence intervals for population means.
ACTIVITY
270604.2179714.qx3zay7
Jump to level 1
Suppose the mean height in inches of all 9th grade students at one high school is
estimated. The population standard deviation is 5 inches. The heights of 7
randomly selected students are 73, 75, 62, 74, 62, 71 and 60.
* = Ex: 12.34 O
Margin of error at 99% confidence level = Ex: 1.23 C
99% confidence interval = [ Ex: 12.34 Ex: 12.340 ]
[smaller value, larger value]
1
Check
Next
D- D
Transcribed Image Text:CHALLENGE 6.2.1: Confidence intervals for population means. ACTIVITY 270604.2179714.qx3zay7 Jump to level 1 Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 5 inches. The heights of 7 randomly selected students are 73, 75, 62, 74, 62, 71 and 60. * = Ex: 12.34 O Margin of error at 99% confidence level = Ex: 1.23 C 99% confidence interval = [ Ex: 12.34 Ex: 12.340 ] [smaller value, larger value] 1 Check Next D- D
Expert Solution
Step 1

Confidence interval give a range of values for the unknown parameter of the population. The width of confidence interval increases with increase in confidence level.

Margin of error is the error due to random sampling. Margin of error reduces with increase in sample size.

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