8- A car rental company finds that among drivers who go over their mile driving limit go over their limit by an average 4.5 miles with a standard deviation of 1.2 miles. You conduct a survey of 49 customers. You want to know the probability that the average drivers drove more than 5 miles or P(Xbar > 5) a) Write out the distribution of the mean: The d'stricution of the Sample mean o normal ditribution with mean 4.5 M:les ond stondord 12 deciation o.17143 mi O019143 =7N4.5,017143) b) Calculate the Z-score for the probability that drivers drove more than 5 miles using the information above. =Plz>292), =1-P(Z<2.92) =1-0.9933 t0.0017 c) Look up the Z-score for problem "6 b" in the standard normal table, what value do you get? - Z-X-p - 5-4 S Graph the picture of this problem with the X and Z values, solve P(Xbar > 5) and interpret d) the results. e) Find the 25th percentile for this problem.
8- A car rental company finds that among drivers who go over their mile driving limit go over their limit by an average 4.5 miles with a standard deviation of 1.2 miles. You conduct a survey of 49 customers. You want to know the probability that the average drivers drove more than 5 miles or P(Xbar > 5) a) Write out the distribution of the mean: The d'stricution of the Sample mean o normal ditribution with mean 4.5 M:les ond stondord 12 deciation o.17143 mi O019143 =7N4.5,017143) b) Calculate the Z-score for the probability that drivers drove more than 5 miles using the information above. =Plz>292), =1-P(Z<2.92) =1-0.9933 t0.0017 c) Look up the Z-score for problem "6 b" in the standard normal table, what value do you get? - Z-X-p - 5-4 S Graph the picture of this problem with the X and Z values, solve P(Xbar > 5) and interpret d) the results. e) Find the 25th percentile for this problem.
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I need help with questions D AND E

Transcribed Image Text:errors, what is the formula for Z-scores:
8- A car rental company finds that among drivers who go over their mile driving limit go over their
limit by an average 4.5 miles with a standard deviation of 1.2 miles. You conduct a survey of 49
customers. You want to know the probability that the average drivers drove more than 5 miles or
P(Xbar > 5)
a)
Write out the distribution of the mean:
The d'stritution of the Sample mean
s normal ditribution with mean 4.S
M:les and stondord deviation o.17143 milke
12
ーフ
Oo19143
b)
Calculate the Z-score for the probability that drivers drove more than 5 miles using the
information above.
=P(z>292)
H0.0017
Look up the Z-score for problem "6 b" in the standard normal table, what value do you get?
=1-0.9983
c)
= 5-4 S
Graph the picture of this problem with the X and Z values, solve P(Xbar > 5) and interpret
d)
the results.
e)
Find the 25th percentile for this problem.
LDUor their recommended mile run training
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