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According to a study completed by Nellie Mae in 2005, the average credit card debt of...

According to a study completed by Nellie Mae in 2005, the average credit card debt of a graduating college student is normally distributed with a mean of $2000. Given the standard deviation is $400, what is the probability that a random sample of 4 graduating student will have a debt between $1800 and $2200?

Question 3 options:

a) 0.95

b) 0.38

c) 0.68

d) 0.99

math   Statistics-And-Probability   
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Answer #1

The avesene Cared it cand debt of a graduating College Student is normally distributed with = $ 100 @bean of $ 2000 and ie xPL A random sample of 4 graduating student will have a debt between $ 1800 and $ 22001 =P ($1800 - K 5 $2200) = 0.68 OptionStandard Normal Probabilities Table entry to the to threw the dado curve ན ， [ AN L + + 3 2 0 05 མ མམ།- ་མམོ། ་་་་་་་་ TOOS10

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