Which game has the best chances of winning? In each game, you REPLACE each item after you draw.

Draw 7 balls from a bin with 10% red. Win if any are red.

Which of the following is FALSE for control groups?

They should be the same size as experimental groups

What's the meaning of a z-score?

The number of standard deviations from the mean

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MDM4U Exam Review #2

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Another review of #combinatorics, #statistics, and #probability for the #mdm4u #exam

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Answers

1
Which game has the best chances of winning? In each game, you REPLACE each item after you draw.
Draw 1 ball from a bin with 50% red. Win if it's red.
Draw 7 balls from a bin with 10% red. Win if any are red.
Draw 7 balls from a bin with 90% red. Win if all are red.
Draw 2 balls from a bin with 50% red. Win if 0 or 2 are red.
2
Ben offers me 10 different cookies. In how many ways can I take one or more cookies?
362880
1023
10
100
3
Calculate the inter-quartile range of: 23,26,31,38,42,43,43,45,47,48,50,54,55,71
48
6
12
44
4
Which of the following is FALSE for control groups?
They should be as similar as possible to experimental groups
They are used to help prove cause-and-effect relationships
They should be the same size as experimental groups
They can be given a placebo to reduce placebo effect
5
15 girls & 11 boys enter a contest. 5 winners are chosen. What's the prob'ty that 4 girls win?
23%
36%
80%
27%
6
Al flips a coin 95 times, & Bea flips a coin 15 times. Who's more likely to get over 60% heads?
Al
Bea
They're equally likely
7
Two dice are rolled. The sum of these dice follows what kind of probability distribution?
None of these
Binomial
Uniform
Geometric
8
What's the meaning of a z-score?
The probability of getting above a certain value
It tells you whether the distribution is normally shaped
The number of standard deviations from the mean
The probability of getting below a certain value
9
How many licence plates (4 letters, 3 digits) have 3 of 1 letter (AAVA) and 3 distinct digits?
258336000
54837120
468000
1872000
10
How many ways can 8 students line up, if Yvonne and Zeke can't be next to each other?
30240
10080
20160
40320

MDM4U Exam Review #2 Flashcards | StudBud