Statistics Probability Distributions

The table represents the probability of guessing correct on a 5 question true-false quiz.  Is it unusual to get 0 correct?

• No, since the probability is less than or equal to .05.

• Yes, since the probability is less than or equal to .05

• No, since the probability is greater than .05.

• Yes, since the probability is greater than .05.

Find the area under the standard normal curve where z < 2.42 .

• .008

• .992

• .301

• .862

The mean temperature in Glens Falls for the month of February is 23 degrees with a standard deviation of 4.2 degrees. Approximately what percent of the days in February would be between 24 and 30 degrees?

• 35.8%

• 68.2%

• 0%

• 50%

The mean temperature in Glens Falls for the month of February is 23 degrees with a standard deviation of 4.2 degrees. Approximately what percent of days in February will be between 14.6 and 31.4 degrees?

• 68%

• 50%

• 99.7%

• 95%

Which represents the number of standard deviations from the mean for the 85th percentile?

• 2.58

• -2.58

• -1.04

• 1.04

In the formula shown, what is in the denominator?

• Sample Mean

• Individual Score

• Sample Variance

• Sample Standard Deviation

We have a pond with 50 fish including 25 trout, 10 tuna, and 15 salmon.  Dr. Hafen reaches into the pond and grabs one at random, what is the probability he grabs a salmon?

• 0.15

• 0.30

• 0.25

• 0.50

The probability that Jalen makes a free throw is 75%. What is the probability he makes his first free throw on his third attempt?

• geometcdf(3, 0.75)

• geometpdf(0.75, 3)

• geometpdf(3, 0.75)

• geometcdf(0.75, 3) 

If the probability that a house in your neighborhood has a dog is 60%, what is the chance that you find a house with a dog before the fifth house?

• 0.97

• 0.99

• 0.02

• 0.04

If Mobius draws 7 cards out of a deck with replacement, what is the probability that he gets the first heart in 6 attempts or fewer?

• 0.18

• 0.82

• 0.06

• 0.76