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Using the digits 0, 2, 3, 7, 8, 9, how many 4-digit numbers can be formed when repetition is not allowed (digits cannot be repeated)?

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Related textbook solutions

Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

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  1. A number of minor automobile accidents occur at various high-risk intersections in Teton County despite traffic lights. The Traffic Department claims that a modification in the type of light will reduce these accidents. The county commissioners have agreed to a proposed experiment. Eight intersections were chosen at random, and the lights at those intersections were modified. At the .01 significance level, is it reasonable to conclude that the modification reduced the number of traffic accidents? Data on Worksheet 2.

       No Accidents

Light No   Before      After

1                      5            3

2                      7            7

3                      6            7

4                      4            0

5                      8            4

6                      9            6

7                      8            8

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