The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. below what value are approximately 97.5% of the students?
a. $215
b. $195
c. $255
d. $275
e. $295

Option D) $275

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = $235

Standard Deviation, σ = $20

We are given that the distribution of amount of money spent by students is a bell shaped distribution that is a normal distribution.

Formula:

We have to find the value of x such that the probability is 0.975

Calculation the value from standard normal z table, we have,  

Approximately 97.5% of the students spent below $275 on textbook.

step-by-step explanation: