1. Adam is measuring the heights in cm of his tomato plants. Frequency
Height (cm)
140 << 150
7
150 160
10
(a) Estimate the mean height.
Give your answer correct to I decimal place.
(3 marks)
(b) Explain why your answer to part (a) is an estimate
(4 marks)
160h 170
15
170 19
180 200
9

Angela took a general public aptitude test and scored in the 88th percentile for aptitude in accounting. what percentage of the scores were at or below her score?

Does the point (1, sqrt 7) lie on circle shown.

Max 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.