Stats test review

Front

What is the probability of drawing two purple marbles from a box containing 5 purple, 3 green, and 2 orange marbles without replacement?

Back

P(both marbles are purple) = 2/9.

Front

What is the mode of the following set of numbers: 7, 14, 20, 3, 7, 14, 2, 14, 7?

Back

The mode is 7 & 14.

Front

What is the mean systolic blood pressure for males in a certain town?

Back

The mean systolic blood pressure is 120.

Front

What is the standard deviation of systolic blood pressure for males in a certain town?

Back

The standard deviation is 9.

Front

How do you calculate the Z-score for a given value?

Back

Z = (X - μ) / σ, where X is the value, μ is the mean, and σ is the standard deviation.

Front

What is the Z-score for Tina if she got a 31 on the ACT, with a mean of 23 and a standard deviation of 4?

Back

The Z-score is 2.

Front

What is the probability that a randomly selected male's systolic blood pressure will be higher than 122?

Back

The probability is approximately 0.412.

Front

What is the mean weight of oranges in an orchard?

Back

The mean weight is 7.5 oz.

Front

What is the standard deviation of the weight of oranges in an orchard?

Back

The standard deviation is 1 oz.

Front

What is the probability that a randomly selected orange weighs between 6 oz. and 8 oz.?

Back

The probability is approximately 0.625.