Posted on by Judy

Suppose X Has A Distribution With A Mean Of 70 And A Standard Deviation Of 12 Ra

x7012n64
(a) Describe the   distribution.
 has a geometric distribution.
 has a binomial distribution.     
 has a Poisson distribution.
 has an approximately normal distribution.
 has a normal distribution.
 has an unknown distribution.
Compute the mean and standard deviation of the distribution. (For each answer, enter a number.)
 = 
mu sub x bar =
 = 
sigma sub x bar =
(b) Find the z value corresponding to   = 73. (Enter an exact number.)
z =  
(c) Find  P( < 73). (Enter a number. Round your answer to four decimal places.)
P( < 73) = 
P(x bar < 73)
(d) Would it be unusual for a random sample of size 64 from the x distribution to have a sample mean less than 73? Explain.
Yes, it would be unusual because less than 5% of all such samples have means less than 73.
No, it would not be unusual because more than 5% of all such samples have means less than 73.     
Yes, it would be unusual because more than 5% of all such samples have means less than 73.
No, it would not be unusual because less than 5% of all such samples have means less than 73.
 
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