Just need the answer no need to explain the process, really need it before 3 am.

Please and thank you

Chapter 06, Section 6.2, Intelligent Tutoring Problem 023

Compute probabilities.

Recall the following definitions from section 6.4 of the text.

Thearea under the normal curvefromx=atox=bwith given mean and standard deviation is the probability thatxassumes a value betweenx=aandx=b. If we are using Table IV in Appendix C, we need to standardize the random variablexusing the formulaz= (x)/, before using the table.

Alternatively, you may use a graphing calculator to obtain more accurate calculations without standardizing the random variablex.

For example, using a TI83 plus we calculate the area under the normal curve fromx=atox=bby using the

normalcdf(a,b,,)

whereis the mean andis the standard deviation of the normal distribution. We use 1E99 for and1E99 for , if needed.

a) standardize the variable value x=26.9

b) standardize the variable value x=26.9