Mathematics, 04.04.2020 00:10, lj2754
A random sample of 81 automobiles traveling on a section of an interstate showed an average speed of 60 mph. The distribution of speeds of all cars on this section of highway is normally distributed, with a standard deviation of 13.5 mph.
1. If we are interested in determining an interval estimate for ? at 86.9% confidence, the z value to use is
a. 1.96
b. 1.31
c. 1.51
d. 2.00
2. The value to use for the standard error of the mean is
a. 13.5
b. 9
c. 2.26
d. 1.5
Answers: 1
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Bobโs bank charges him a $3.15 service fee every time he uses an out-of-network atm. if bob uses an out-of-network atm an average of three times every two weeks, how much will he pay in service fees over the course of a year? a. $327.60 b. $109.20 c. $491.40 d. $245.70 select the best answer from the choices provided a b c d
Answers: 1
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