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Information from the Department of Motor Vehicles indicates that the average age of licensed drivers is µ = 45.7 years with a standard deviation of o = 12.5 years. Assuming that the distribution of drivers ages is approximately normal,
a. What proportion of licensed drivers are more than 55 years old?
b. What proportion of licensed drivers are less than 26 years old?
based on all tax returns filed in 2001 the internal revenue service found the total deduction claimed on an itemized
A study of 200 computer service firms revealed these incomes after taxes: What is the probability that a particular firm selected has $1 million or more in income after taxes?
The specification limits are set between 15.8 and 16.2 ounces. a) Compute and interpret the machine's Cp b) Compute and interpret the machine Cpk
The firm has already decided that any sample mean below 78 or above 82 will signal the workers that the process is not working properly.
I have two contingency tables. One has a chi-square value of 14.40 and the other is 27.86. Both have 6 degrees of freedom. Based on an alpha of .01 do you reject the null hypothesis?
Consider two independent Poisson processes, with arrival rates α and β, respectively. Determine: The probability q that the next three arrivals come from the same process The PMF of N, the number of arrivals from the ?rst process that occur before..
consider the relationship reported for the quadriceps strength index 120degs and the hop index r 0.744 p 0.000. what
Suppose we have a set of body temperatures with a mean of 98.6 degrees, and a sample standard deviation of 0.5 degrees. Assuming a normal distribution of body temperatures in the larger population, between what two values should 95% of all tempera..
An electric power trading company has an option to buy 1,000,000 terawatts of electricity from a producer for $10 per terawatt. Other electric power trading companies have received this option and the company knows a decision must be made quickly.
They tested a random sample of 40 batteries using a special device designed to imitate real-world use and recorded data on battery lifetime. Determine the sample mean (in minutes).
question 1 if 100 random samples of size n were drawn and if for each a 99 confidence interval fornbspmu was computed
q1. dun amp bradstreet reports among other things information about new business incorporations and number of business
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