Which of the following statements about using a protractor are correct?

the protractor measures angles up to 90°.
the vertex of the angle must be at the 0° mark.
one ray of the angle must point at 0°.
the protractor measures angles that open from left or from the right.

Needmax recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Use sigma notation to represent the following series for 9 terms.

Which of the following is an example of conditional probability