The overnight shipping business has skyrocketed in the last ten years. The single greatest predictor of acompanyʹs success has been proven time and again to be customer service. A study was conducted to study thecustomer satisfaction levels for one overnight shipping business. In addition to the customerʹs satisfaction level,the customers were asked how often they used overnight shipping. The results are shown below in thefollowing table. What is the probability that a respondent did not have a high level of satisfaction with thecompany? Round the the nearest hundredth. $$\begin{array} { c | c c c | c } & { \text { Satisfaction level } } & \ \text { Frequency of Use } & \text { High } & \text { Medium } & \text { Low } & \text { TOTAL } \ \hline 5 \text { per month } & 70 & 25 & 5 & 100 \ \hline \text { TOTAL } & 460 & 220 & 20 & 700 \end{array}$$ A) 0.34 B) 0.66 C) 0.57 D) 0.43

Question

The overnight shipping business has skyrocketed in the last ten years. The single greatest predictor of acompanyʹs success has been proven time and again to be customer service. A study was conducted to study thecustomer satisfaction levels for one overnight shipping business. In addition to the customerʹs satisfaction level,the customers were asked how often they used overnight shipping. The results are shown below in thefollowing table. What is the probability that a respondent did not have a high level of satisfaction with thecompany? Round the the nearest hundredth. $$\begin{array} { c | c c c | c } 
& { \text { Satisfaction level } } & \
\text { Frequency of Use } & \text { High } & \text { Medium } & \text { Low } & \text { TOTAL } \
\hline < 2 \text { per month } & 250 & 140 & 10 & 400 \
2 - 5 \text { per month } & 140 & 55 & 5 & 200 \
> 5 \text { per month } & 70 & 25 & 5 & 100 \
\hline \text { TOTAL } & 460 & 220 & 20 & 700
\end{array}$$
A) 0.34
B) 0.66
C) 0.57
D) 0.43

Quizplus · Accepted Answer

The probability of not having a high level of satisfaction is the sum of the probabilities of having a medium or low level of satisfaction. The probability of having a medium level of satisfaction is 220/700 = 0.314, and the probability of having a low level of satisfaction is 20/700 = 0.029. Therefore, the probability of not having a high level of satisfaction is 0.314 + 0.029 = 0.343, which rounds to 0.34.

The Overnight Shipping Business Has Skyrocketed in the Last Ten