Posted by Pat on Monday, March 26, 2012 at 9:15pm.
An agricultural economist is interested in determining the average diameter of peaches produced by a particular tree. A random sample of 50 peaches is taken and the sample mean calculated. Suppose that the average diameter of peaches on this tree is known from previous years' production to be 75 millimeters with a standard deviation of 15 millimeters. What is the probability that the sample mean exceeds 78 millimeters?

statistics  PsyDAG, Tuesday, March 27, 2012 at 12:20pm
Z = (mean1  mean2)/standard error (SE) of difference between means
SEdiff = √(SEmean1^2 + SEmean2^2)
SEm = SD/√n
If only one SD is provided, you can use just that to determine SEdiff.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.
Answer This Question
Related Questions
 statistics  A study of peach trees found that the average number of peaches per...
 OPRE  A producer is very proud of the peaches he grows. He claims that, on ...
 Algebra  Fiona and camila took a load of peaches to the farmers market. During ...
 math (grade6)  cassie and connor are selling peaches yesterday cassie sold 31 ...
 Fractions Math  Fiona and camila took a load of peaches to the farmers market. ...
 Fractions  Fiona and camila took a load of peaches to the farmers market. ...
 Fractions  Fiona and camila took a load of peaches to the farmers market. ...
 Math  Fiona and camila took a load of peaches to the farmers market. During the...
 math  Basir collected 41/3 baskets of peaches at an orchard. if each basket ...
 Beorstone  Why does walter love his peaches so much He does not love his ...
More Related Questions