Mathematics, 27.05.2021 02:10, girlydiy17
A toy manufacturer wants to know how many new toys children buy each year. A sample of 686686 children was taken to study their purchasing habits. Construct the 85%85% confidence interval for the mean number of toys purchased each year if the sample mean was found to be 6.86.8. Assume that the population standard deviation is 2.12.1. Round your answers to one decimal place.
Answers: 2
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
.
, so Z = 1.44.
is the standard deviation of the population and n is the size of the sample.
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A toy manufacturer wants to know how many new toys children buy each year. A sample of 686686 childr...
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