A random sample of 81 automobiles traveling on a section of an interstate showed an average speed of 60 mph. The distribution of speeds of all cars on this section of highway is normally distributed, with a standard deviation of 13.5 mph. The value to use for the standard error of the mean is _____
a. 13.5
b. 9
c. 2.26
d. 1.5
d
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Why is the ability to track purchases by song mix so important for Ferrante's clients?
A) Ferrante sells cheaper custom mixes than standard soundtracks available from other vendors. B) It allows the clients to shape the store brand with music. C) It gives them information on their competitor's products and services. D) It allows them to increase sales by playing the songs that stimulate purchases. E) It requires them to play certain songs no more than a few times in a shift.
A potential disadvantage of groups in organizations is that they
A) often breed conformity in thinking and behavior. B) encourage a spirit of teamwork. C) encourage individuality in thinking and behavior. D) discourage consensus thinking.
The transportation method is a special case of the family of problems known as what?
A) regression problems B) decision tree problems C) linear programming problems D) simulation problems E) statistical problems
Acme, Inc., produces widgets. To manufacture a new type of widget, it took 64 hr for the first widget. Acme estimates it has an 87% learning rate. Using the logarithmic approach, calculate the time it will take to manufacture the 62th widget.
A. 19.35 hr B. 27.90 hr C. 22.55 hr D. 18.94 hr