The standard deviation of the average age of a breed of dog is said to be 3.69.
<h3>What is the standard deviation about?</h3>
Note that we take:
- x = dog age has mean 19.5
- Unknown standard deviation.
Hence:
z = (x - mean) /SD is distributed N (0,1) - mean o standard deviation 1 (standard normal)
Since 20% of dogs are known to be older than 22.6 years:
So 22.6 years is said to be 80th percentile,
Since z matching to 80th percentile (using the standard normal table) s is <em>0.84.</em>
Then one need to plug z, x which is = 22.6
mean = 19.5 into the stated z equation:
Hence,
0.84 = (22.6 - 19.5)/SD
SD = (22.6 - 19.5)/0.84
= 3.69
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Answer:
The situation that best illustrates an effect of the law of demand is, for example, that a theater sells more popcorn after it lowers the price of popcorn, so the quantity demanded increases as a result of a decrease in price.
In an isosceles triangle ! Two angles and two sides are equal. If angle b is greater than a then angle a= angle c (since b is not equal to a). This means that the adjacent sides of angle a and angle c will be equal. In this case the sides AB and BC are equal. Angle a= angle c. In this case AB is NOT equal to AC and AC is NOT equal to BC. #answerwithquality #BAL
That great good for you I hope this helps
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Explanation:
