Prob and Stats Exam Review

The mean value of the outcomes.

• mode

• mathematical expectancy

• range

• conditional probability

Subset of a population

• mean

• permutation

• sample

• normal distribution

Similar to a normal distribution but wider.

• t distribution

• uniform distribution

• skewed distribution

• double skewed distribution

Middle value of a set of values arranged in order of magnitude.

• mean

• median

• mode

• range

Compute the 75% Chebyshev's interval.

• 38.56 to 92.56

• 52.06 to 79.06

• 25.06 to 106.06

• 63.56 to 67.56

A histogram with 2 peaks in data is called ________

• symmetrical

• uniform

• bimodal

• skewed

Find the 15% trimmed mean.

• 81.7

• 88.2

• 83.5

• 86.3

If Q1 = 12 and Q3 = 50, what is the IQR?

• 38

• 62

• 31

• 28

You have a 5 number summary like: Low = 8, Q1 = 11, Median = 17, Q3 = 20 and High = 25. Would 34 be an extreme value or outlier?

• Yes

• No

If the correlation coefficient is .8 then what percent of the change in response variable is due to a change in the explanatory variable?

• 80%

• 8%

• 64%

• 20%