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A sample size of 50 is selected from a normal distribution having a mean of 95 and a standard deviation equal to 15. What is the probability of selecting a sample having a mean exceeding 100?
In fitting a least squares line to n = 15 data points, the following quantities were computed: SSxx = 55
the time x it takes to reboot a certain system has gamma distribution with ex 20 min and stdx 10 min.a compute
Based on the data, determine the 95 percent confidence interval evaluate for true population mean?
Test the claim that the average gasoline consumption per car in the United States is more than 7 liters per day. (We're going metric here!) Use the random sample here, which represents daily gasoline usage for one car:
To find out the prior probability, conditional probability and posterior probability. Calculate the posterior probability that the bid will be successful given a request for additional information.
a social researcher believes the color red causes mens attraction to women to increase as well as womens attraction to
A random sample of gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 44.7 cents?
Suppose that January sales for the fourth year turn out to be $295,000. What was your forecast error? If this is a large error, Karen might be puzzled about the difference between your forecast and actual sales value.
a frequency distribution was constructed for the ages of all 25 of the ceos of the company x. to answer the parts of
What is descriptive statistics? How can you use descriptive statistics through analysis tool pack? Discuss how to use Descriptive Statistics to produce measures? Can these be sued to support decision making?
Draw a picture of the entrie machine. Whatis the probability that the entrie machine has failed? (Test yourgeneral formula: if q1 = 0.15, q2 = 0.1 and q3 = 0.05, then group 2 works with probability 0.855 and the entire machine has failed with prob..
suppose the amount of a popular sport drink in bottles leaving the filling machine has approximately a normal
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