A smaller standard deviation for the normal probability distribution results in a _______________________
A) fatter curve that is more spread out around the mean and not as tall
B) fatter curve that is tighter and taller around the mean
C) skinnier curve that is tighter and taller around the mean
D) skinnier curve that is more spread out around the mean and not as tall
C
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Which statement is not true if deciding on the number of scale categories to use in a non-comparative itemized rating scale?
A) Traditional guidelines suggest that the appropriate number of categories should be seven plus or minus two: between five and nine. B) The smaller the number of scale categories, the finer the discrimination among stimulus objects that is possible. C) If the respondents are not very knowledgeable or not involved with the task, fewer categories should be used. D) How the data are to be analyzed and used should also influence the number of categories.
Centurion Processing finishes the first unit in 100 hours and learns at a 75% rate. Their competitor, Ochenta Incorporated, completes their fist unit in 80 hours but learns at an 80% rate
If they match total output with each other how many more units must each fierce rival make before Centurion is faster than Ochenta? A) four more B) six more C) eight more D) ten more