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The price of XYZ Corporation stock is normally distributed throughout the year with a mean of $42.00 per share and a standard deviation of $2.25 per share. Assume that the stock is traded 240 days out of the year.
a. What percent of the days is the price over $45.00?
b. What percent of the days is the price between $38.00 and $40.00?
c. What is the stock's value at it's highest on 15 days of the year? (Assume that there are 240 trading days in a year).
Construct a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall assuming that the amount spent follows a normal distribution.
An automobile insurance company estimates the following loss probabilities for the next year on a $25,000 sports car:
Interpreting confidence interval for the P-value. Give an appropriated response. A weight loss center provided a loss for 72% of its participants.
Assuming no discrimination based on gender, what is the probability of getting 41 or fewer women when 100 new employees are hired?
What is the probability of finding exactly four watch soap operas?
There are two telephone lines A and B. Let E1 be the event that line A is being used and E2 be the event that line B is being used
The results of the simple linear regression are provided below.
Two types of flares are tested for their burning times (in minutes) and sample results are given below.
Make up a scatter diagram with 10 dots for each of the following:
Create a 95 % confidence interval for the true mean. Why might normality be the issue here?
Write down the advantages and disadvantages of using computer software for decision making.
Assuming that these are a random sample of all publicly traded companies, construct a 95 % confidence interval for the overall noncompliance proportion.
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