Confidence intervals may be very narrow when:

A) the sample size is large and variability is low
B) the sample size is small and the variability is low
C) the sample size is large and the variability is high
D) the sample size is small and the variability is high
E) the sample size is average and the variability is higher than average


A

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Indicate whether the statement is true or false

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Forty percent of the students who enroll in a statistics course go to the statistics laboratory on a regular basis. Past data indicates that 65% of those students who use the lab on a regular basis make a grade of A in the course. On the other hand,

only 10% of students who do not go to the lab on a regular basis make a grade of A. If a particular student made an A, determine the probability that she or he used the lab on a regular basis.

Business

What should leaders first assess in order to apply the Situational Leadership model?

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The operations of Bridgeton Corporation are divided into the Adams Division and the Carter Division. Projections for the next year are as follows: Adams Division Carter Division  Total Sales$560,000  $336,000  $896,000 Variable costs 196,000   154,000   350,000 Contribution margin$364,000  $182,000  $546,000 Direct fixed costs 168,000   140,000   308,000 Segment margin$196,000  $42,000  $238,000 Allocated common costs 84,000   63,000   147,000 Operating income (loss)$112,000  $(21,000) $91,000 Operating income for Bridgeton Corporation as a whole if the Carter Division were dropped would be:

A. $49,000. B. $91,000. C. $133,000. D. $112,000.

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