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The monthly cost of a long distance phone plan in dollars is a linear function of the total calling time in minutes. When graphed, the function gives a line with a slope of 0.11.
The monthly cost for 37 minutes of calls is $16.40. What is the monthly cost for 44 minutes of calls?
The number of widgets produced by 9 employees in an eight hour shift is recorded below. Find the mean number of widgets produced.
The batteries used in a digital watch have an operating life that is normally distributed. As sample of 18 batteries reveals a mean of 2.35 years and a standard deviation of 0.4 years.
Discuss what is meant by mean, median, mode, variance, and standard deviation for a set of scores. Also mention under what circumstance you would use each of these.
Suppose that monthly rental rates for unfurnished one-bedroom apartment in Ann Arbor, Michigan, are approximately normal in distribution, with a mean of $750 and a standard deviation of $150.
A furniture store claims that a specially ordered product will take, on average, M = 35 days (5 weeks) to arrive. The standard deviation of these waiting times is 8 days.
Determine the regression equation. Determine the coefficient of determination. Do you think Mr. Profit should be satisfied with using the size of the offering as the independent variable?
On a graph, the vertical difference between the observed and predicted values of the response variable for an individual is called the
When an experiment is conducted, one variable is manipulated to see the impact on another variable -- that's why experiments address causation.
A biased coin with probability of head being .6 is tossed 12 times. What is the probability that number of head would more than 4 but less than or equal to 10.
The number of phone calls coming into a switchboard in the next five minutes will either be 0, 1, or 2. The probabilities are the same for each of these (1/3).
A psychiatrist hires you to study whether her clients self-disclosed more while sitting in an easy chair or lying down on a couch. All clients had previously agreed to allow the sessions to be videotaped for research purposes.
Given the binomial distribution with n = 23 and p = 0.79, would the normal distribution provide the reasonable approximation? Why or why not?
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