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The speed at which you can log into a website through a smartphone is an important quality charactersitc of that website. In a recent test, the mean time to log into the Hertz website through a smartphone was 7.524 seconds. (Data extracted from N. Trejos, Travelers Have No Patience for Slow Mobile Sites," USA Today, April 4, 2012, p. 3B) Suppose that the download time is normally distributed, with a standard deviation of 1.7 seconds. What is the probability that a download time is
less than 2 seconds?
between 1.5 and 2.5 seconds?
above 1.8 seconds?
99% of the download times are slower than how many seconds?
the xyz inc. buys mother boards for its computer assembly. the following information is available use generally
odds makers try to predict which professional and college football teams will win and by how much the spread. if the
Assume that a simple random sample has been selected from a normally distributed population. Find the test statistic, P-value, critical value(s), and state the final conclusion.
Find out the marginal probability density function for the provided value. Assume that two random variables, X and Y, have bivariate pdf given by:
What is the maximum error of estimate for p ?
What does it mean to say that a particular value of x has a z-score of -2.1?
descriptive statistics for given data.weekly salaries in dollars for a sample of registered nurses are
You are Supervisor or Research for Doggie Heaven Biscuit Company. Your scientists have developed a new dog biscuit for the treatment of doggie breath.
Given length an athlete throws a hammer is a normal random variable with mean 50 feet and standard deviation five feet, what is the probability he throws it: Between 50 feet and 60 feet.
hese students obtained a mean score of 470 with a standard deviation of 40 on a standardized test. Assuming a mound-shaped and symmetric distribution, what percentage of scores exceeded 390?
suppose fx y1 amp gx y xy 0lt x lt1 0ltylt1 determine the most powerful test of size ? .05 of hypxyf
there are 4 unrelated parts to this question. justify your answersa i if 8 identical blackboards are to be divided
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