Empirical Rule Question 7 l =1000, A certain brand of lightbulb lasts according to a normal distribution with J =50 hours. 'hours and Chapters 5 - 8 Test 2 Due April 21 (a) what is the probability that a lightbulb selected at random will last between 1000 and 1050 hours (b) what is the probability that a lightbulb selected at random will last between 850 hours and 900 hours. Questlon 6 Summit County 65% of the voter population are Republicans. What is the probability that a random sample of 10 Summit County voters will contain: (a) Exactly 8 Republicans? (b) Exactly 2 Republicans? (c) No Republicans? (d) All Republicans?

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