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Unit 9 Probability and Statistics Review Flashcards | StudBud
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Unit 9 Probability and Statistics Review
Unit 9 Probability and Statistics Review
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1
Researchers measure the BMI of 100 subjects that walk at least once a week and 100 subjects who do not.
Experiment
Observational Study
2
56 of 100 people we polled in Plattsmouth like eating fish. How many people in Plattsmouth like eating fish? Pop: 6,500
11,607
4,225
3,250
3,640
3
How many standard deviations away from the mean does a number need to be in order to be an outlier?
2
4
1
3
4
What is the mode: 4, 4, 6, 7, 8, 9?
6.5
5
4
6.3
5
A data set has a mean of 45 and an outlier of 136. When the outlier is removed what will happen to the mean?
Cannot be determined
Does not change
Decreases
Increases
6
What is the mean: 4, 4, 6, 7, 8, 9?
5
6.5
6.3
4
7
What type of sampling method: 100 teachers in the state of Iowa gave their opinion on retirement benefits.
Stratified sample
Simple random sample
Systematic sample
Self-selected sample
8
What type of sampling method: We asked 5 random teachers from each school in the state of Iowa about retirement.
Systematic sample
Self-selected sample
Stratified sample
Simple random sample
9
A passcode consists of 4 digits (0 through 9) where digits CAN be repeated. How many different passcodes are there?
40
6,561
1,000
10,000
10
Rob has 4 shirts, 3 pairs of pants, and 2 pairs of shoes that all coordinate. How many outfits?
576
9
24
29
11
Sue flipped a coin 200 times and got heads 106 times. What's the experimental probability her next flip will be tails?
47/200
53/100
47/100
1/2
12
Tim rolls a 6 sided die once. What's the probability he rolls a multiple of 3?
1/3
1/4
1/6
1/2
13
What is the median: 4, 4, 6, 7, 8, 9?
4
6.3
5
6.5
14
A bag contains: 4 red marbles, 2 blue marbles, and 10 green marbles. Probability of choosing anything NOT purple?
1/5
1/3
1
2/5
15
From a standard deck of cards. What's the probability of drawing a red or a jack?
15/26
8/13
29/52
7/13
16
What is the IQR of the data set?
4
8
6
2
17
What is the probability of drawing a king when I know I've drawn a red card?
1/13
2/13
4/13
3/13
18
A bag contains: 4 red , 2 blue, and 10 green marbles. Probability of choosing a red then blue? NO REPLACEMENT
1/3
1/30
23/60
1/32
19
A bag has tiles labeled 1 through 7. What is the probability I will take out one tile at a time to get 1-7 perfectly?
1/7
7!
1/7!
7
20
What is the range: 4, 4, 6, 7, 8, 9?
5
6.3
4
6.5
21
What is the median of the data set?
2
8
4
6
22
A bag contains: 4 red marbles, 2 blue marbles, and 10 green marbles. Probability of choosing a red OR a blue?
2/5
3/8
1/5
4/5
