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At Acme Records, research indicated that for each new CD the company solicits an "intent to purchase" score from the student, with ) being the lowest score ("no intent to purchase"? and 100 being the highest score. The manager finds the following information for 130 intent to purchase scores for a soon to be released CD.
Group Sample Size Sample Mean Sample Variance
1 26 68.3 104.22 26 65.4 71.13 26 65.6 87.94 26 58.3 79.65 26 68.1 116.7
Conduct a one-way independant-samples ANOVA test
Determine:
1 What is the value of the mean square for error (the "within groups" mean square that would be reported in the ANOVA test, and
2- What is the value of the mean square for treatments (the "between groups" mean sqaure) that would be reported in the ANOVA test?
Compute the coefficient of determination for bone loss and women's age and describe what this statistic means.
A psychologist has designed a questionnaire to measure individuals' aggressiveness. Assume that the scores on the questionnaire are normally distributed with a standard deviation of 80.
In a regression analysis, the sum of the squared deviations between y and y-bar is SST = 200.0. If the sum of the squared deviations about the regression line is SSE + 40.0, what is the coefficient of determination?
A component has an exponential time-to-failure distribution with a mean of 10,000 hours. The component has already been in operation for its mean life. What's the probability that it will fail by 15,000 hours?
Based on past data, the Student Recreation Center knew that the proportion of students who prefer exercising outside over exercising in a gym was 0.734. To update their records, the SRC conducted a survey. Out of 95 students surveyed, 76 indicated..
Drug sniffing dogs must be 95% accurate. A new dog is being tested and is right in 46 of 50 trials. Find a 95% confidence interval for the proportion of times the dog will be correct.
What test can be performed to compare the percentage of participants who developed abnormal triglyceride levels between the vitamin A and the trace group? Report a two-tailed p value.
A customer wants to estimate the average delivery time of a pizza from the local pizza parlor. The customer wants to obtain a sample mean that falls within 3.204 minutes of the true average delivery time with 99% confidence. If the customer knows ..
Penultimate Support Systems makes fairly good speaker and equipment support stands for music groups. The assembly process involves two operations
Research on new juvenile delinquents revealed that 38% of them committed another crime. What is the probability that 40 or fewer of the delinquents will commit another crime?
Construct a 99% confidence interval for the average length of usage time to recharge.
Which of the following best expresses the value of using percentages in data presentation? A. Provides for the calculation of marginals.
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