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Employer A states the average number of days missed in a year by each staff member is 4.0. Office personnel randomly sampled a portion of their attendance records to determine if this claim was accurate. For the previous year, the following data was obtained from the sample group, regarding absences for that year: 4, 4, 3, 2, 6, 8, 7, 1, 9, 3, 1, and 6. At the .05 level of significance, is there convincing evidence that the number of absences per employee has increased?
Formulate the hypotheses that can be used to determine whether the mean of all account balances is significantly different from $1,150
Do the data provide significant support for any preferences among the three brands? Test At the .05 level of significance.
Assuming we can verify that the data set is approximately normally distributed, what percentage of times will the server be down less than 24 minutes?
Determine x-bar and s for this data set. You may suppose the values for bulb life are normally distributed. Use traditional method to make your decision.
The simple coefficient of determination is the proportion of total variation explained by the regression line.
Describe what do you mean by terms 'false positive" and " false negative".
Which is the estimated or dear proportion of defective cups in the population?
Find out the suitable critical value(s) for this situation given a 0.05 significance level. Find out/compute the value of sample test statistic.
Find the percentage of the total variation that cant explained by the linear relationship between the two variable.
Determine the probability of fatal accident over lifetime? Describe your reasoning carefully. Suppose independent events. Why might the supposition of independence be violated?
The probability that a bomber hits a target on a bombing mission is 0.700. Three bombers are sent to bomb a particular target.
If W denotes the total number of spaces one moves under these special conditions, find the mean and standard deviation of W.
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