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The Manager of a seafood restaurant was asked to establish a pricing policy on lobster dinners. Experimenting with prices produced the following data:
Avg # Sold per Day (y) Price (x) Avg # Sold per Day (y) Price (x)
200 $6.00 155 $8.25
190 6.50 156 8.50
188 6.75 148 8.75
180 7.00 140 9.00
170 7.25 133 9.25
162 7.50
160 8.00
A) Plot the data and a regression line on the same graph (please show all steps, work, and formula)
B) Determine the correlation coefficient and interpret it (please show all work, steps, formulas)
Evaluate the area under the standard normal curve that lies to the left of z = - 3.49 and simple random sample of size
Find out whether this is enough evidence to accept or reject manager's null hypothesis, using alpha = .01. Is this test left-tailed, right-tailed or two-tailed?
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The conservative degrees of freedom for the t distribution are and The standard error, conservative degrees of freedom
Use given data to create the unbiased point estimate of 12σ'> 2 of percentage of termites that are minor workers.
Calculate the mean number and median number of apples in a bag.
The 'interaction effect' was also important. By using the means in the table above write a statement explaining how the anti-anxiety drug appears to affect anxiety. Are the outcomes consistent with the hypothesis proposed by the researchers?
If 20 measurements are taken and their standard deviation is 1.8, is there enough evidence to reject the claim that her standard deviation is within the limit at ∞ = .01?
Calculate the standard error of estimate for the regression equation.
A banks loan officer rates applicants for credit. The ratings are causally distributed with a mean of 200 also a standard deflation of 50.
In a random sample of 10 adults from a nearby county, the mean waste generated per person per day was 4.35 pounds and the standard deviation was 1.88 pounds.
In a water treatment plant, the turbidity level, and is suspected is linearly related to inches of accumulated rainfall in the month, x. The following information related to the waste water plant is available:
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