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(a) Draw the scatter plot for the variables.
(b) Compute the correlation coefficient. Use three decimal places.
(c) Find the equation of the regression line.
(d) Find the predicted y-value for the specified x-value.
15. Consider the data.
x
64
54
40
31
45
38
42
41
37
y
841
725
635
616
615
582
535
520
511
485
Find y-predicted when x = 44.
the emergency room at hsi serves patients who arrive according to a poisson distribution at the rate of 9 per hour.
Based upon all of this information, do a "goodness-of-fit" test to see if the distributions are the same as they were two years ago. Use a level of confidence of .01. Should we accept Ho or reject Ho?
Calculate the mean, median, and standard deviation for ounces in the bottles and construct a 95% Confidence Interval for the ounces in the bottles.
What extremely important characteristic of the data set is not considered in the hypothesis test?
A car manufacturer has redesigned the anti-theft device on one of its models to increase the time that it takes for a professional car thief to be able to steal the car.
Easy-Fly Airline took a random sample of 25 flights to determine if the mean time it takes for luggage to reach the travelers departing from a flight is less than 15 minutes. The sample mean was found to be 13.8 minutes with a standard deviation o..
Write the null and alternative hypotheses. You want to see if the number of minutes cell phone users use each month has changed from its mean of 120 minutes 2 years ago.
The quality-control inspector of a production plant will reject a batch of syringes if two or more defective syringes are found in a random sample of eight syringes taken from the batch. Assume the batch contains 1% defective syringes.
During a professor's office hours, students arrive, on average, every ten minutes. Assume that the distribution of the time between arrivals follows an exponential distribution. Suppose that a student has just left.
Discuss something you have witnessed or observed in nature. Discuss the temptation to imply or infer causality and be sure to identify areas of future investigation that might be warranted to determine cause and effect.
The mean monthly rent for a random sample of 10 apartments advertised in the local newspaper is $640. Assume that the standard deviation is $90. find a 95% confidence interval for the mean monthly rent for unfurnished one-bedroom apartments ..
a study found that foot lengths for japanese women are normally distributed with a mean of 24.9 and a standard
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