What animal is this?

• Obviously a peacock!

• A very sick owl

• A very strange cow

• Mr. E

A stock had a quarterly gain of 9%, 12%, 9%, and 14%. Which measure of center makes the stock look the most profitable?

• mean

• median

• mode

• range rover

Find the mean absolute deviation of the set of numbers: 8. 14, 11, 17, 16, 24. 

• 2

• 4

• 15

• 16

Eliza posted a survey question on FB about changing the name of the school to Eliza Academy. Of those who responded, 90% said they wanted to change the name. Which statement reflects the validity of the survey?

• Valid; it is an unbiased systematic random sample.

• Valid; it is an unbiased random sample.

• Not valid; it is an unbiased convenience sample.

• Not valid; it is a biased voluntary response sample.

Leeza tossed a coin 40 times. She got 25 heads and 15 tails. What is the experimental probability of tossing heads?

• 25%

• 37.5%

• 50%

• 62.5%

Listen carefully and answer the question correctly...not much time on this one!

• Are you kidding me?

• x=2

• x+2=x-1

• Mr. E that was too quick. Stop messing with us!

A jar contains 5 blue marbles, 1 yellow marble, and 4 green marbles. What is the probability of randomly choosing a yellow marble, replacing it, and then choosing a yellow marble again?

• 
  

  $\frac{1}{10}$
  

• $\frac{1}{5}$

• $\frac{1}{50}$

• $\frac{1}{100}$

What is the mean, median and mode of this data? 20, 15, 24, 37, 55, 1, 39, 40, 3, 35, 28, 0.

• mean=24.75, median=26, no mode

• mean=24.75, median=20, mode=55

• mean=27, median=26, no mode

• mean=55, median=52, mode=0

Which measure of variability does NOT correspond to this data?

83, 63, 82, 78, 74, 90, 59, 68, 71, 59, 88, 85.

• median=76

• third quartile=84

• range=90

• first quartile=65.5

Brookie Cookie put all of your names into a hat and selected three names without looking. What type of smple did she use?

• simple random sample

• systematic random sample

• biased sample

• convenience sample