7.1 Margin of Error

A research team surveys 200 high schoolers at glenoak. They find that 57% of them drive to school every day. What is the margin of error?

• 95%

• 14%

• 7%

• 3%

Tags

CCSS.HSS.IC.B.4

A recent survey of 2000 high schoolers found that 80% use their phones more than 4 hours a day on average. What is the interval for which we could expect to find the truth of the population?

• 2%

• 78% - 82%

• 93% - 97%

• 82%

Tags

CCSS.7.SP.A.2

Complete the following statement about the change in size.

If you increase the size of your sample, the ME will . . . .

• increase

• decrease

• stay the same

Tags

CCSS.HSS.IC.B.4

The sample size of poll is 107 people. What is the approximate margin of error.

• 10%

• 3.1%

• 2.38%

• 1%

Tags

CCSS.HSS.IC.B.4

The statistic is a number describing the:

• population

• sample

• survey

• percent

Tags

CCSS.HSS.IC.B.3

Why is a sample of 1000 people better than a sample of 100 people?

• It reduces the margin of error.

• It eliminates bias.

• Having more people creates more work.

• More people means that our results are always correct.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A sports-and-exercise shop sampled its customer base one weekend and asked 35 customers their age. Which interval estimate of the population mean has a margin of error of 1.7 ?

•  26.0 ≤ x̄ ≤ 30.0
• 26.8 ≤ x̄ ≤ 30.2
• 33.3 ≤ x̄ ≤ 37.6
• 24.0 ≤ x̄ ≤ 46.0

Tags

CCSS.HSS.IC.B.4

A study by the department of education in a certain state found that there was a mean SAT score of 534 with a margin of error of 20.

Which score(s) would fall outside the confidence interval?

• 505

• 530

• 550

• 558

Tags

CCSS.HSS.IC.B.4

A study by the department of education in a certain state found that there was a mean SAT score of 534 with a margin of error of 20.

Create a confidence interval for the true mean.

• (534, 554)

• (514, 534)

• (514, 554)

Tags

CCSS.HSS.IC.B.4