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The prizes that can be won in a sweepstakes are listed below together with the chances of winning each one: $5900 (1 chance in 8600); $2700 (1 chance in 5000); $600 (1 chance in 4800); $200 (1 chance in 2500). Find the expected value of the amount won for one entry if the cost of entering is 52 cents.
The population of SAT scores forms a normal distribution with a mean of µ=500 and a standard deviation of o =100. If the average SAT score is calculated for a sample of n=25 students,
What do these results say about testing with group data? Include in your answer the URLs of the sites where you found the necessary data.
A City Survey states that 70 percent of all business owners favor increasing the parking fees. The city has commissioned a random sample of n = 100 business owners.
A least squares linear trend line is just a simple regression line with the independent variable being time (months or years for example).
Write down the name of 4 parts of the regression equation.
Suppose 12% of these workers work more than 48 hours. Based on this percentage, what is the standard deviation of number of hours worked per week for those workers.
A bridge hand consists of 13 cards dealt at random from an ordinary deck of 52 playing cards. How many possible bridge hands are there?
Erthromyacine is a drug that has been related with side effects during pregnancy. Assume that 30% of women experience side effects between the 24th and 28th week of pregnancy.
Use the data to estimate the true population mean gas tax with 90% confidence. Does your interval contain the national average of 21 cents?
Negatively correlated and that the area of the home and the selling price are positively correlated? Use the .05 significance level. Report the p- value of the test.
Assume a normal distribution for pH values. If a random sample of 10 readings in a vat is taken and the mean pH is computed, find each of the following?
A Correlation matrix (correlation, coefficients and probability level under the hypothesis rho= 0) for a company's sales force (age, years of service, and current sales) is given below. Comment.
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