Let 'x' be a random variable that represents the length of time
it takes a student to write a term paper for Tonys class. After
interviewing students, it was found that 'x' has an approximately
normal distribution with a mean of µ = 7.3 hours and standard
deviation of ơ = 0.8 hours.
For parts a, b, c, Convert each of the following x intervals to standardized z intervals.
a.) x < 7.5
b.) x > 9.3
c.) 5.5 < x < 8.7
< z <
For parts d, e, f, Find the following probabilities: (Use 4 decimal places)
d.) P(x < 7.5) =
e.) P(x > 9.3) =
f.) P(5.5 < x < 8.7) =
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