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tatertott6633
22.07.2019 •
Mathematics
Suppose the average monthly mortgage payment in a city, including principal and interest, is $782 with a standard deviation of approximately $180. if the mortgage payments are assumed to be normally distributed, find the probability that a randomly selected monthly payment is between $600 and $1100.
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Ответ:
We start out finding the z-value associated with each end of this interval, using the formula
z=(X-μ)/σ
z=(600-782)/180=-182/180=-1.01
Using a z-table (http://www.z-table.com) we see that the area to the left of, less than, this is 0.1562.
For the upper end:
z=(1100-782)/180=318/180=1.77
Using a z-table, we see that the area to the left of, less than, this is 0.9616.
We want the area between them, so we subtract:
0.9616-0.1562 = 0.8054
Ответ:
To support her discussion it would be best for Alexus to use GRAPH B for her presentation.
Alex should use this graph for her presentation because the number of faulty products APPEARS TO DECREASE LESS on this graph.
Step-by-step explanation: