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The following data (webvisit .txt) are the number of visits to a web site over a 3-week period.
15321 15382 15337 15338 14320 15366 15251
15319 15405 14594
14453 14376 14249 15377 14489 15285 15425
15333 15319 15273
14290
(a) Construct a histogram of these data.
(b) Write a short report describing the distribution of the visits to this web site. Include some discussion of why this distribution might have that particular shape.
In 1992, the FAA conducted 86,991 pre-employment drug tests on job applicants who were to be engaged in safety and security relatd jobs and found that 1,143
Consider the event "Ray is in the garage" and the event "Felix is not in the garage." Are these events mutually exclusive? What is the mean number of cats in my garage at 4:00 pm?
q1.a study has shown that the interpupillary distance for all adult males is normally distributed with a mean of 65 mm
If 200 of the adults surveyed were in the age category of 24 and under and they provided a standard deviation of $14.50, construct a 95% confidence interval for the weekly average expenditure on fast food for adults 24 years of age and under.
The sample mean is 2.59 and the sample standard deviation is .66. Conduct the following test using 95% level of confidence.
Compute the expected value of the total waiting time of all passengers who have come to the station in order to catch a train that leaves at time t.
Formulate the null and alternative hypotheses. Determine the criterion for rejection or non-rejection of the null hypothesis.
Florida consumers are confident about the economy. verify the 90% confidence interval. State in a sentence the meaning of the derived confidence interval .494, .568. What would be your conclusion?
Assume that the duration of human pregnancies can be described by a normal model with mean 268 days and standard deviation 17 days. What percentage of pregnancies should last between 260 and 270 days?
a local ice cream shop wants to see if they should promote a new swizzleberry swirl or creamsicle flavored drink. in
suppose x and y have joint density fxy. are x and y independent ifa fxy xe-x1y for xy gt 0b fxy 6xy2 when xy gt 0 and
\Write down the general formula for the discrete uniform probability distribution function. Now write down the probability distribution function for the random drawing of tile numbers. Is this a discrete uniform distribution?
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