Measures of the Spread of the Data · Exercise 28

X = the number of days per week that 100 clients use a particular exercise facility.
$$\begin{array}{cc}\text{x}& \text{Frequency}\\ \text{0}& \text{3}\\ \text{1}& \text{12}\\ \text{2}& \text{33}\\ \text{3}& \text{28}\\ \text{4}& \text{11}\\ \text{5}& \text{9}\\ \text{6}& \text{4}\end{array}$$

The number that is 1.5 standard deviations BELOW the mean is approximately _____

(a) 0.7
(b) 4.8
(c) –2.8
(d) Cannot be determined

OpenStax, Introductory Statistics 2e · §2.7 Measures of the Spread of the Data · Exercise 28