Simon M.

A sample of size n=78  is drawn from a normal population whose standard deviation is =σ6.2 The sample mean is x= 39.06. Construct an 80% confidence interval for μ.?< u <?

A sample of size  n=46 is drawn from a population whose standard deviation is 21. Find the margin of error for a 90% confidence interval for μ Round the answer to at least three decimal places.

Assume g:[0,8]→R is a continuous function for which: on the intervals [0,3)∪(5,8], the values of g(t) are positive; on the interval (3,5), the values of g(t) are negative. Also, let... more

Suppose you are playing a game. The random variable, Y, represents your net profit in dollars. The probability distribution of Y is as follows. (Round your answers to 4 decimal places, if... more

Bob sells tires. He knows that his weekly sales drop if he increases the unit price p (in dollars). The weekly sales are given by an unknown function N(p). His weekly revenue is R(p)=pN(p).Bob is... more

On average, how much time occurs between five consecutive calls?Ninety-percent of all calls occur within how many minutes of the previous call?Suppose that two minutes have elapsed since the last... more

A school has 10 iPads, 20 Chromebooks, and 5 laptop computers in their technology loaner supply closet. For each part below, assume all devices are available (so the supply does not change in part... more

A software development group uses randomly generated computer file names for security. If each name must be created by selecting two letters, with repeats allowed, from the set {a, b, c, d}... more

A department store chain has up to $22,000 to spend on television advertising for a sale. All ads will be placed with one television station, where a 30 second ad costs $1,000 on daytime tv, and is... more