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The following table gives the coal usage and electricity generated by ten randomly selected power stations in South Africa in 1992:
COAL USED (MILLION TONS) POWER GENERATED (MW - HR)
15 35
6 18
10 24
18 32
9 24
7 20
14 32
11 29
5 14
1. Calculated Pearsons correlation coefficient and comment on the value obtained. (show all workings)
2. Determine the line regression line.(show all workings)
3. Estimate the power generated by a power station that consumed 20 million tons of coal. (show all workings)
A new machine has just been installed to cut and rough-shape large slugs. The slugs are then transferred to a precision grinder. One of the critical measurements is the outside diameter.
Suppose that data is recorded for equal period of "before"-"after" time. Use 1% level for risk. Given processed data, explain what John must do.
At α = 0.05, is the correctness of the prediction different for the two types of cola drinkers?
You want to determine if the sample result gives good evidence that the true amount of the compound is not equal to 2 gms. Carry out the test, find the P-value, and state your conclusion.
The standard deviation of the differences d for the paired sample data s d = ____________
You are given following information on residents' responses, broken down by sex. Determine the probability that resident is a man and opposes the bridge?
Category of decision rule which contains maximax decision rule is?
If Molly and Kathleen wishes to make a profit of $5,000 for summer, how many pupils do they require to enrol?
Nationwide, the average time until a electric utility customer service representative answers a call is 260 second. The Gigantic Kilowatt Energy Company rnadomly sampled 30 calls and found that, on average, they were answered in 227 second with a ..
Listed below are the commissions earned ($000) last year by the sales representatives at the Furniture Patch, Inc.
The following survey questions have been established for a medical errors and patient safety business research paper:
Fifty raffle tickets are numbered 1 throughout 50, and one of them is drawn at random. What is the probability that the number is a multiple of 5 or 8? Consider the following "solution": Since 10 tickets bear numbers that are multiples of 5 and 6 ..
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