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%