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1. Computer abuse by employees is an ongoing worry to businesses. A study revealed the data shown below. At α = .01, is the frequency of disciplinary action independent of the abuser's level of privilege?
Computer Abuse Incidents Cross-Tabulated by Punishment and Privilege
(a) Calculate the Chi-square test statistic, degrees of freedom and the p-value.
(b) Find the critical value for Chi-Square. Refer to the chi-square table.
2. In a three-digit lottery, each of the three digits is supposed to have the same probability of occurrence (counting initial blanks as zeros, e.g., 32 is treated as 032). The table shows the frequency of occurrence of each digit for 90 consecutive daily three-digit drawings.
Digits in 3-Digit Lottery Numbers on 90 Days
Calculate the Chi-square test statistic, degrees of freedom and the p-value.
Solving quadratic equations. Discriminant of a quadratic equation. Compute the value of the discriminant and give the number of real solutions to the quadratic equation.
a. A firm uses a computer-based training module to prepare 20 machinist to use new numerically controlled lathes. The module contains a test at the end of the course; X i
Your firm manufactures computers. You are sent a very large shipment of chips by a supplier. You want to accept this shipment only if ten percent or less of the chips are defe
Construct a 90 percent confidence interval for the true mean weight. (b) What sample size would be necessary to estimate the true weight with an error of 0.02 grams with 90
Make a scatter plot. Do you expect a positive, negative, or zero correlation? Why? Find the correlation coefficient and the equation of the line of best fit and write them dow
Let K be the number of heads in n = 100 flips of a coin. Devise significance tests for the hypothesis H that the coin is fair such that (a) The significance level α = 0.05 a
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