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AP Stats U6&U7 M/C 2nd Period

Authored by Emily Thomas

Mathematics

10th - 12th Grade

CCSS covered

Used 2+ times

AP Stats U6&U7 M/C 2nd Period
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5 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Media Image

We have calculated a 95% confidence interval and would prefer for our next confidence interval to have a smaller margin of error without losing any confidence. In order to do this, we can:

I only

II only

III only

I and II

I and III

Tags

CCSS.HSS.IC.B.4

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

A Type I Error occurs in which of the following situations?

HA is rejected and the null hypothesis is true.

HO is rejected and the null is false.

HO is rejected and the null is true.

The P-Value is too small to reject the null.

The alpha level is too small and so the null is rejected.

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The manager of an orchard expects about 70% of his apples to exceed the weight requirement for “Grade A” designation. At least how many apples must he sample to be 90% confident of estimating the true proportion within ±4%?

19

23

89

356

505

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Which of the following is true about Student’s t-models?

I only

I and II

I and III

II and III

I, II, and III

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A professor was curious about her students’ grade point averages (GPAs). She took a random sample of 15 students and found a mean GPA of 3.01 with a standard deviation of 0.534. Which of the following formulas gives a 99% confidence interval for the mean GPA of the professor’s students?

3.01±2.947(0.53415)3.01\pm2.947\left(\frac{0.534}{\sqrt{15}}\right)

3.01±2.977(0.53415)3.01\pm2.977\left(\frac{0.534}{\sqrt{15}}\right)

3.01±2.576(0.53415)3.01\pm2.576\left(\frac{0.534}{\sqrt{15}}\right)

3.01±2.947(0.53414)3.01\pm2.947\left(\frac{0.534}{\sqrt{14}}\right)

3.01±2.977(0.53414)3.01\pm2.977\left(\frac{0.534}{\sqrt{14}}\right)

Tags

CCSS.HSS.IC.B.4

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