True or False The normal distribution is a discrete probability distribution An

Question

True or False The normal distribution is a discrete probability distribution An average light bulb manufactured by the Eastern Corporation lasts 300 days with a the standard deviation of 50 days. Assuming that bulb life is normally distributed, what is probability that an Eastern light bulb will last at most 365 days? a. 50% b. 80% c. 90% d. 40% The average amount of weight gained by polar bears over the winter months is uniformly distributed from 0 to 30lbs. Find the probability a polar bear will gain between 10 and 15lbs during the winter months. a. 0.166 b. 0.333 c. 0.033 d. 5 True or False In a uniform probability distribution, P(x) is constant between the distribution's minimum and maximum values. True or False For any uniform probability distribution, the mean and standard deviation can be computed by knowing the maximum and minimum values of the random variable. The shape of any uniform probability distribution is a. Negatively skewed b. Positively skewed c. Rectangular d. Bell shaped A new drug relieves nasal congestion in 90 percent of those with the condition. The new drug is administered to 300 patients with the condition. What is the probability that more than 265 will be relieved of nasal congestion? a. 0.0916 b. 0.1922 c. 0.8078 d. 0.3078

Explanation / Answer

9) false

10) P(X<365)=P(Z<(365-300)/50)=P(Z<1.3)=0.9032 option C

11)=5/30= 0.166 option A

12)true

13)true

14)option C

15)option C

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