1.3
1.4
345
1.5
1.6
4032 4049 4115
.4452 4207 4265
.4332 4345 4394
4452 4463 4505
1.7 .4554 4564 4599
4641 4649 4678
11112
66419
1.8
1.9
.4713 .4719 4744
4772 .4778 4789
2.0
2.1
2.2
.4821 .4826 4842
4861
4864 .4878
2.3
.4893 .4896
4906
2.4
4918 4920
.4929
2.5
4938 .4940
4946
2.6
.4953 4955
4960
2.7
.4965 .4966
4970
2.8
.4974 4975 4978
2.9
4981 .4982 .4984
3.0
.4987 .4987 .4989
Enter all answers to the nearest tenth. Some of the following numbers will be used more than once and some may not
be used.
A delivery driver has an average daily gasoline expense of $55.00. The standard deviation is $10.00. The owner takes a
sample of 54 bills. What is the probability the mean of his sample will be between $45.00 and $65.00?
Step 1. Calculate the z-score for $45.00.
Step 2. Give the probability for step 1.
%
Step 3. Calculate the z-score for $65.00.
Step 4. Give the probability for step 3.
Step 5. Add the probabilities from steps 1 & 3.
v%