Name:
Exam I-ISOM 631A-Fall23
Submission Instruction:
For problems 1 and 2,
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each object that you create should have you initials
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paste screenshots for each section separately under each problem in the word document
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make a whole screenshot that shows the time and the date.
For problem 3, answer in the word document.
Problem 1) (5 points) Answer the following questions using the dataset “
InsuranceSurvey
”
excel file from Homework Dataset using SAS EG
a. Read the dataset in SAS
b. Use the Histogram tool to construct frequency distributions for years employed. Do not group
the data into bins.
c. Apply the
Descriptive Statistics
tool (use only one PROC statement) for a subset of individuals
with Age and YearsEmployed. What is the Mean value for Age and for YearsEmployed
Problem 2)
(6 points) use the Insurance Survey file that you load it at problem 1 section
a.
create a simple random sample of 10 unique records. Use proper PROC statement (hint:
Use method=SRS and seed=123456 )
b.
Estimate the mean and standard deviation for the sample
c.
Let’s assume that we don’t know the population Standard Deviation. Calculate the
Confidence Interval at 90% for estimating the population mean for YearsEmployed
Problem 3) The average time customers spend on hold when calling a customer service center
follows a normal distribution with a mean of 8 minutes and a standard deviation of 2 minutes.
You decide to conduct a study and randomly select 36 customers to compute their average hold
time. What is the probability that the average hold time for these 36 customers is more than 8.5
minutes?
