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Using a regression equation to calculate the correlation coefficient. Attachment in Word.

The owner of an office building studies heating cost versus daily high temperatures. He records the following data: Temperature (deg C) @ Cost ($100) ------------------------------- 1 @ 9 4 @ 5 6 @ 3 10 @ 2 He proposes a regression equation to predict the cost of heating the building. What is the predicted heating cost for a day with a high temperature of 8 degrees C and what is the correlation coefficient?

Subject:

Statistics

Topic:

All Topics

Posting ID:

1848

OTA ID:

102534

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Calculating the standard deviation of a given data set. Attachments in Word.

At the end of the season, the number of wins in a softball league for each of the eight teams is: {10, 9, 5, 4, 4, 3, 3, 2) What is the standard deviation of wins?

Subject:

Statistics

Topic:

All Topics

Posting ID:

1849

OTA ID:

102534

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Problems with Using the Excel Solver- Kak Industries

I just need help with the calculations as I am new with Excel Solver, and I am having problems formulating. For the LP problems, you will need to solve using the Excel Solver. We have used the Sum Product feature when using Excel. So in cases where you can use that, please do so.

Subject:

Statistics

Topic:

All Topics

Posting ID:

1877

OTA ID:

102309

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Proportion of the population

Suppose the President wants an estimate of the proportion of the population who support his current policy toward gun control. The President wants the estimate to be within 0.04 of the true proportion. Assume a 95% level of confidence. The President's political advisors estimated the proportion supporting the current policy to be 0.60. How large a sample is required? How large a sample would be necessary if no estimates were available for the proportion that support current policy?

Subject:

Statistics

Topic:

All Topics

Posting ID:

2051

OTA ID:

102799

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Finding confidence interval for beta

Given this set of data: (x,y): (-9,10.5), (-7,18.5), (-5,22.6), (-3,27.2), (-1,31.2), (1,33), (3,44.9), (5, 49.4), (7,35), (9,27.6) Find a 90% confidence interval for beta 2(B2) [note: this deals with the model y=B0+B1X+B2X^2+e, e is the error, e~N(0, o~^2) (where o~ is sigma, the variance)] Is there evidence of a quadratic effect in the relationship between x and y? Use a 10% level test if B2=0.

Subject:

Statistics

Topic:

All Topics

Posting ID:

2062

OTA ID:

102454

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