Test3 Math 224 NC A& Show work to receive full credit. I. Find the shaded area u

Question

Test3 Math 224 NC A& Show work to receive full credit. I. Find the shaded area under the standard normal curve given below 2. Assume that the variable under consideration has a density curve. The area under the density curve that lies to the right of 15 is 0.206. What percentage of all possible observations of the variable exceed 152 What percentage of all possible observations of the variable are at most 15? a. b. 3. Determine the following probability from the curve jtx) diagrammed below rto 0.5 4. At North Carolina A&T;, GPAs are normally distributed with a mean of 2.6 and standard deviation of 0.6. Find the third quartile or the 75th percentile. Page 1

Explanation / Answer

1.

P(-1.08<z<1.08) =P(Z<1.08)-P(Z<-1.08)

=0.85995-0.14007

=0.71986

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