GH The total area under a normal distribution curve to the left of the mean is a

Question

GH The total area under a normal distribution curve to the left of the mean is always A) equal to 1 B) equal to zero C) equal to 0.S D) greater than.5 6. 7. The tails of a normal distribution curve A) B) C) D) meet the horizontal axis at :-3.0 never meet or cross the horizontal axis cross the horizontal axis at 2-4 are nonsymmetric 8. For a normal distribution, the spread of the curve decreases and its height increases as A) the sample size decreases B) the standard deviation decreases C) the ratio of the mean and standard deviation increases D) the mean increases 9 For the standard normal distribution, the z value gives the distance between the mean and a point in terms of the: A) mean B) standard deviation C) variance D) center of the curve For a normal distribution, the z value for an x value that is to the left of the mean is always: A) equal to zero B) negative C) less than D) positive 10. 11. For the standard normal distribution, the area between : 0 and: 1.37, rounded to four decimal places, is: 12. For the standard normal distribution, the area between : - O and: -2.32, rounded to four decimal places, is: Page 2

Explanation / Answer

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6)

Total area is equally divided to the right and left of mean

Since total area is = 1

So,

Area to left of mean = 0.5

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