Identifying Length of Confidence Interval

A random sample of 46 scores from the examination of ABM learners is taken and it gives a sample mean of 78 with the interval scores between 77.18 and 78.82 having a 90% level of confidence. What is the upper limit?

• 77.82

• 77.18

• 78.18

• 77.2

What do you call the value resulting from subtracting the margin of error from the sample mean?

• point estimate

• interval estimate

• lower limit of the interval

• upper limit of the interval

Which of the following symbol stands for the margin of error?

• E

• Za⁄2

• n

• 

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?

• 15.7

• 2.2

• 0.95

• 0.05

Which of the following values and percent illustrates the confidence interval?

• 30.8

• (35,39)

• 92%

• 92% and 94%

Which of the following symbols is used for the population standard deviation?

• E

• μ or 𝑋̅

• n

• σ

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. What is the upper limit of the interval?

• 16.3

• 17.9

• 18.7

• 20.7

For a 95% confidence level, the confidence coefficient is ± ____?

• 1.645

• 1.96

• 2.33

• 2.58

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