ProbStat_LQ - 2nd Quarter

It is a function that associates a real number to each element in the sample space. It is a variable whose values are determined by chance.

• frequency

• probability

• random variable

• statistics

The value is _____ if the set of possible outcomes is countable.

• random

• continous

• discrete

• variance

Values are measured by heights, weights and temperature.

• continous

• random variable

• discrete

• probability

It consists of the values a random variable can assume and the corresponding probabilities of the values.

• frequency distribution

• probability mass function

• random variable

• none of these

All are properties of a normal curve, EXCEPT:

• The distribution curve is bell-shaped

• The curve is asymmetrical about its center

• The mean, median and mode coincide at the center

• The width of the curve is determined by the standard deviation

It is a measure of relative standing

• random variable

• z-score

• standard deviation

• probability

It leads to the area under the curve found in the normal curve table

• standard deviation

• z-score

• random variable

• probability

Given the mean of 62 and standard deviation of 8, what is the corresponding z-score of x = 50?

• 1.5

• 1.48

• -1.5

• -1.48

What is the area of the curve if the z-score is 1?

• .3413

• .3431

• .6882

• .4772

The formula in solving z

• $\frac{\mu-x}{\sigma}$

• $\frac{x-\mu}{\sigma}$

• $x-\mu$

• $\frac{x+\mu}{\sigma}$