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Suppose that the actual amount of instant coffee that a filling machine puts into "6-ounce" jars is a random variable having a normal distribution with σ = 0.05 ounce. If only 3 percent of the jars are to contain less than 6 ounces of coffee, what must be the mean fill of these jars?
If four students are to be randomly selected from this group, find the probability that exactly two undergraduates will be among the four chosen.
The length of time recorded is normally distributed with a mean of 184 seconds and a standard deviation of 55 seconds. What is the probability that and individual will be able to keep eye contact longer than 239 seconds?
there are 13 hearts in a full deck of 52 cards. in a certain game you pick a card from a standard deck of 52 cards. if
You want to estimate the proportion of households in the Portland area that have no land-line telephone service. Suppose you plan to take a simple random sample of Portland households and target a margin of error no larger than plus or minus .02 f..
For a sample with a mean of M =51, a score of X =59 corresponds to z = 2.00. What is the sample standard deviation?
A researcher has reason to believe that, for an experiment with 50 points, a 95% prediction interval would be of width 4. If the researcher wishes to run a more precise experiment that will result in a 95% prediction interval of width 2, then the ..
What type of solution do you get for a quadratic equation where D
Mean operating cost for the fleet of delivery trucks because the sample mean is contained in the interval. Do you agree? How would you interpret this confidence interval?
Can the college conclude that the students in the new program are significantly different from the rest of the freshman class? Use a two-tailed test with .05.
After a logarithmic transformation, we obtain the following regression result of Cobb-Douglas production formula for a firm:
nine students take an exam and have an average score of 75. a tenth student takes the exam and her score is added to
the fox tv network is considering replacing one of its prime-time crime investigation shows with a new family-oriented
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