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Consumption Temperature
126 30
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87 42
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50 61
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118 27
The owner of a single-family home would like to develop a model to predict electricity consumption in his house, based on average atmospheric temperature in degrees Fahrenheit.
Monthly kilowatt usage and temperature data are available for a period of 24 months
1.) Assume a linear relationship, use the least square method to find the regression coefficients bo and b1
2.) Predict the mean kilowatt usage when the average temperature is 50 degrees Fahrenheit.
3.) Compute the Durbin-Watson statistic. At the 0.05significance level, is there evidence of autocorrelation among the residuals?
Scores on a scholastic aptitude test are normally distributed with standard deviation σ=100 points. A group of 25 inner city high school students takes the test; their mean scores is x-bar = 440 points.
One thing you have learned is that the tangency portfolio will give you the maximum Sharpe ratio. Consequently, you have constructed such a portfolio. What are you portfolio weights.
She collected the employee performance ratings recorded before and after workshop attendance and stored the paired ratings for all 35 in Perform.
In testing equality of two means below, determine the test statistic? (Use the equal variances formula)
Sketch the appropriate distribution, and locate the critical region for a = 0.05.
Make a graph to visualize the problem and state, without doing the calculations, whether the p-value of the test
There're several measures of central tendency. By far the most frequently utilized of these measures is mean of population. Remember that the source of the data that you want to analyze always comes from what is called a population.
State the values of the coefficient of correlation and coefficient of determination correct to three decimal places
If the estimate is to be within 8 mpg of the true mean with 98% confidence and the estimated standard deviation is 22 mph, how large a sample size must be taken?
Carry out the global test of hypothesis to find out whether any of the regression coefficients are not equal to 0. Use.05 level of significance.
Would Kruskal-Wallis be the suitable statistical procedure to test this Research Question (RQ)? Describe your answer. When would you use Chi-Square test rather than One-Way Anova?
What is the probability of a false negative test (the probability that a person having muscular distrophy tests negative)?
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