Interval Estimates

What measure of central value best estimates the population mean?

• Margin of Error

• confidence level

• Point Estimate

• Interval Estimates

Which of the following illustrates confidence level?

• 95%

• 12.5

• 50.0

• 90-95

Which of the these illustrates confidence interval?

• 0.95

• 99%

• 100

• 54-59

Is a statistic expressing the amount of random sampling error in the results of a survey.

• confidence coefficient

• Margin of Error

• lower confidence limit

• point estimate

What do you call the value resulting from adding the margin of error from

the sample mean?

• point estimate

• interval estimate

• lower limit of the interval

• upper limit of the interval

• 2.58

• 1.96

• 1.65

• 3.28

A survey of 200 Senior High School learners shows that they read on average 18.5

hours per week with a margin of error of 2.2 hours at a 95% confidence level.

What is the sample mean?

• 200

• 18.5

• 15.7

• 2.2

A survey of 200 Senior High School learners shows that they read on average 18.5

hours per week with a margin of error of 2.2 hours at a 95% confidence level.

Which of the following values is the margin of error?

• 2.2

• 15.7

• 0.95

• 0.05

A random sample of 36 scores from the examination of TVL learners is taken and

gives a sample mean of 65. At a 90% level of confidence, the interval estimate of the

population mean is between 64.18 and 65.82.

Which of the following values is the 𝑥̅?

• 364.18

• 67.18

• 65

• 64.82

A sample size of 50 has a mean of 20. The population standard deviation is 18 and

the confidence level to be used is 95%.

What is the sample size in the given statement?

• 18

• 20

• 95

• 50