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Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the afternoon shift than on the day shift. A sample of 54 day-shift workers showed that the mean number of units produced was 345, with a standard deviation of 21. A sample of 60 afternoon-shift workers showed that the mean number of units produced was 351, with a standard deviation of 28 units. At the .05 significance level, is the number of units produced on the afternoon shift larger?
If the computed value for this problem is +2.33, and the level of significance is 0.05, can we conclude that the recall proportions for the two commercials are same?
From Group of 40 People, a jury of 12 people is selected. In how many various ways can a jury of 12 people be selected?
Find the probability that the driver was intoxicated or the pedestrian was not intoxicated?
What control limits should be applied to his sample?
Based on this sample information, create a 90% confidence interval for population mean yearly premium.
There were 25 subjects included in each of the combinations of gender and smoking status. One of the variables measured was the heart rate after six minutes of exercise. A two-way ANOVA is performed with the resulting ANOVA table given below
Conduct an analysis of variance
The null hypothesis is that there was no change in average liquor consumption. State this formally in terms of µ.
Find the probability of exactly 6 Mexican-Americans among 12 jurors.
The sample proportion of large gloves for each location is and . (Round your answers to 4 decimal places.)
Perform hypothesis testing on one variable's data.
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
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