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A real estate broker hoped to develop an equation that could be used to predict the sales price of homes in a certain suburb. It seemed to him that the most important variables, since all the homes were in pretty much the same locale, were age of house, square feet, and number of bedrooms.
_ _X=7.1 Y=90.7 x=0.4 y=-0.2 Sigma x^2=87.76Sigma y^2=2481.44 Sigma xy=408.62
Determine the relationship between sales price and age of house and determine the correlation coefficient.
Is the age of the house significant factor at alpha=0.05 in determining sales price? Explain
What does the fact that the correlation is less than 100% suggest?
Compute average daily rainfall in the week and for weekends. Get the average of weekdays' rainfalls and average of weekend's rainfalls.
When we have data that are measured at the interval/ratio level of measurement, there are:
Using a critical value, test hypothesis at the 1% level of significance.
Index number acts as a barometer for measuring the value of money. What are the characteristics of an index number? State its utility.
Florida State University administers a mathematics placement test to students where they 1st enter the university.
In a study of elephants a researcher wishes to determine the average weight of a certain subspecies of elephants. From previous studies, the standard deviation of the weights of elephants in this subspecies is known to be 1500 pounds.
Sample data in a goodness-of-fit test are compared with __________. A. a predetermined or historical standard for the variable being studied
What information is provided by the numerical value of the Pearson correlation? For the following scores, compute the Pearson correlation:
A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05). What is the value of the sample mean?
Multiple choice question based on multiple regression - partial computer output based on a sample of 16 observations and find the estimated regression equation
Calculate an 85% confidence interval for the population mean number of wolf pups per den at southwestern United States (US).
Make for more scatter plots comparing GDP growth 1970-2000 to corruption, political rights, rule of law, and socio-political instability
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