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A large internet retailer, is studying the lead time (elapsed time between when an order is placed and when it is filled) for a sample of recent orders. The lead times are reported in days.
Lead Time (days) Frequency
0 up to 5 6
5 up to 10 7
10 up to 15 12
15 up to 20 8
20 up to 25 7
Total 40
a. How many orders were placed?
b. What is the midpoint of the first class?
c. Draw a histogram.
An independent testing services road-tested 36 of the automobiles.
A loan application is received this morning. What is the probability that:
At the 5% level of significance, can we infer that the population mean weight of athletic men is lower than the population mean weight of non-athletic men by more than 2 pounds?
Process data by Excel using its two-way ANOVA without replication program.
Suppose the population is normally distributed they make a decision to do a hypothesis test.
Construct a 95% confidence interval for the population mean.
What is the probability that the mean completion time is between 1 and 2 hours, i.e.., 60 and 120 minutes?
What is the probability that a student who has failed the test came from the South District?
The cost for the conference room, instructor compensation, lab assistants, and promotion is $9,600. Micromedia rents computers for its seminars at a cost of $60 per computer per day. Question: find the breakeven point for this problem using Excel.
Out to right, create a 90% confidence interval estimate of sigma (σ), population standard deviation.
What is the probability that none can transact business in a foreign language?
What does the coefficient of determination tell you about the variation in attendance and the variation in the number of exhibitors?
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