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What is the logic behind using the sum of the products of deviation scores as the numerator of the formula for the correlation coefficient? Is this logic sound? Why or why not?
Write all the possible samples of size 2 and calculate the average or median of each one.
The annual returns, in percentages, on stocks A and B for three possible states of the economy are given in the table below.
The width of a confidence interval will be:
Customers arrive to the company at a rate, on average, of one per hour with a Poisson distribution. The company is staffed by a single individual(the owner) who takes on average 30 minutes with each customer with a standard deviation of 15 minute..
Of 900 consumers surveyed, 414 said they were very enthusiastic about a new home decor scheme. What is the 99% confidence interval for the population proportion?
Provide free: fax assistance for the residents of this city, use the binomial approximation to the hyper geometric to find the probability that at least 3 women arc selected.
A side effect of a certain anesthetic used in surgery is the hiccups, which occurs in about 10 percent of the cases. If three patients are scheduled for surgery today and are to be administered this anesthetic, compute the probability that
Determine the probability of receiving at most three calls in a five-minute interval of time. Determine the probability of receiving exactly 10 calls in 15 minutes.
Solving quadratic equations. Discriminant of a quadratic equation. Compute the value of the discriminant and give the number of real solutions to the quadratic equation.
Let ≥ represent the true average area (in square feet) of these apartments. What are the appropriate null and alternative hypotheses?
Researchers at a pharmaceutical company have found that the effective time duration of a safe dosage of a pain relief drug is normally distributed with mean 2 hours and standard deviation 0.3 hour.
If the monthly demand for videos on average is 180 and standard deviation = 60, what is the number of videos the manager should order to meet 90% customer demand?
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