The measured weights of 1,000 men in a certain village follow a normal distribution with a mean of 150 pounds and a standard dev
2 answers:
Answer:
<em>About 160 people weigh more than 165 pounds. </em>
Step-by-step explanation:
The measured weights of 1,000 men in a certain village follow a normal distribution with a mean of 150 pounds and a standard deviation of 15 pounds.
We know that,
where,
X = raw score = 165
μ = mean = 150
σ = standard deviation = 15
Putting the values,
Finding the value of probability for z=1, from z score table,
Hence, 84% of total men will weigh less than 165 pounds. So 16% of men will be more than 165 pounds, i.e
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Answer:
Out of 450 phones 18 of them will have a defect.
Step-by-step explanation:
As we know that out of 75 phones 3 of them will have a defect, this means that we are able to calculate how many defects there will be from 450 phones. You can do this by first dividing 450 by 75, this gives you 6. This means that 75 will go into 450 6 times.
From this we are able to work out the number that will have defects. This is because we know that 75 goes into 450 6 times and that for each 75 phones there will be 3 defects. So to work out the number of phones out of 450 that would be defects you would simply multiply 3 by 6, this gives you 18. This shows that out of 450 phones 18 of them will have a defect.
1) Divide 450 by 75.
2) Multiply 6 by 3.