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anyanavicka [17]
3 years ago
13

A zookeeper predicted that the weight of a newborn lion would be 2. 8 pounds. When the zoo’s lion gave birth, the newborn weighe

d 3. 5 pounds. What is the zookeeper’s percent error? round to the nearest percent.
SAT
2 answers:
sergey [27]3 years ago
7 0
20% would probably be the right answer
jarptica [38.1K]3 years ago
4 0
20% is the only true answer
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The average age of a breed of dog is 19.5 years. if the distribution of their ages is normal and 20% of dogs are older than 22.6
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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
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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

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Learn more about standard deviation from

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