Margin of Error

Standard Deviation

100

Find the Margin of error when the sample population has a size of 16 and a standard deviation of 2. (95% confidence interval) Round up at Whole number.

1

200

Find the Margin of error when the sample population has a size of 75 and a standard deviation of 3. (95% confidence interval. Round to two decimal places)

0.69

300

Find the Margin of error when the sample population has a size of 140 and a standard deviation of 15. 95% confidence interval. (Round up at Hundredths)

2.54

400

Find the Margin of error when the sample population has a size of 10,000 and a standard deviation of 58. (95 % confidence interval and round up at Hundredths)

1.16

500

Find the Margin of error when the sample population has a size of 250,000 and a standard deviation of 97.

(95% confidence interval and Round up at hundredths)

0.39

Percentile

100

In a survey of 10 people, 7 said yes, and 3 said no.  Find the margin of error for this survey (to two decimal places and 95% confidence interval)

0.29

200

In a survey of 30 people, 17 said yes, and 13 said no.  Find the margin of error for this survey (to two decimal places) (95% confidence interval)

0.18

300

In a survey of 320 people, 57 said yes, and 263 said no.  Find the margin of error for this survey (to two decimal places) (95% confidence interval)

0.043

400

In a survey of 471 people, 431 said yes, and 40 said no.  Find the margin of error for this survey (Round up at thousandths) (95% confidence interval)

0.026

500

In a survey of 84,023 people, 48,310 said yes, and 35,713 said no.  Find the margin of error for this survey (Round up at ten thousandths) (95% confidence interval)

0.0034

Probability

100

If I flip a coin 4 times, and it lands on heads all four times, what is the probability that it lands on heads on the fifth flip?

1/2

200

If you roll two dice, what is the probability that you get a number less than 3 on both of the dice (don't add the dice up!)

1/9

300

What is the probability that you flip a coin three times, and get 2 heads and 1 tails

3/8

400

Assume you have a full deck of cards. If you draw an ace as your first card, what is the probability that you get a face card (king, queen, or jack) on the second card

12/51

500

When rolling two dice, what is the probability of getting a 7 or an 11 on your roll?

8/36 or 2/9