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Mathematics, 25.12.2019 06:31 estrella7777
At a large conference of teachers from a variety of subjects, a random sample of 50 mathematics teachers attending the conference was selected. among the selected mathematics teachers, 28 percent had taken one or more courses in statistics. for which of the following populations is 28 percent a reasonable estimate of the percentage of those who have taken one or more courses in statistics?
a. all mathematics teachersb. all mathematics teachers who attended the conferencec. all mathematics teachers who have taken one or more courses in statisticsd. all teachers who attended the conferencee. all teachers
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Mathematics, 22.06.2019 00:30, sanfordl
1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?
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At a large conference of teachers from a variety of subjects, a random sample of 50 mathematics teac...
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