Statistics Probability Rules

The probability of it raining today is 30%.  What is the probability that it will NOT rain?

• 30%

• 70%

• 100%

• 0%

Find the MAD of these numbers 25, 23, 28, 29, 27, 32, 24, 26, 22, 27

• MAD=26.3

• MAD=29.3

• MAD=2.93

• MAD=2.63

The forecast shows a 70% chance of rain. How likely is it to rain?

• Impossible

• Unlikely

• Likely

• Certain

Experimental Probability is:

• What Will happen 

• What actually happens

• What should happen

• What I think Happens

Find the median:
5, 6, 3, 9, 0, 4, 1, 2, 7

• 4

• 4.1

• 5

• 4.5

Probability is ...

• the chance that some event will occur.

• a game that involves coins.

• a guarantee.

In a game, the probability of winning is 1 out of 5. How many times could Lisa expect to win if she plays the game 85 times?

• 17

• 34

• 68

• 80

A coin was tossed 80 times, out of which it landed on heads 60 times. What is the relative frequency of the coin toss resulting in tails?

• 20%

• 25%

• 50%

• 75%

Kris has a bag that contains only red marbles, green marbles, and purple marbles. Kris pulls a marble from the bag, records the color of the marble and puts it back in the bag. She performs 25 pulls and draws 8 red marbles, 12 green marbles, and 5 purple marbles. Based on the data, about how many times would Kris pull a red marble if she performed 1,000 pulls?

• 200

• 320

• 330

• 470

What is the difference in the IQRs?

• 1

• 2

• 3

• 4