1. A sample of ** 16
students** from a large university is taken.

was ** 22 years
**with

for the average age of the population is ** [x,y]**.

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(a) What is ** x**?

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(b) What is *y*?
*(to 1 digit)*

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2. You are given the following information obtained from a random sample of 4 observations.

25 |
47 |
32 |
56 |

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(a) What is ** the point estimate of Łg**?

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(b) Suppose the *95%*
confidence interval for *Łg*
is *[x,y]*. What is *x*?

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(c) Suppose the 90% confidence
interval for *Łg*
is *[x,y]*. What is *y*?

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3. A statistician selected a sample of 16 accounts
receivable and determined ** the mean**
of

the sample to be ** $5000**
with

information indicated the mean of the population
ranges ** from $4739.8 to $5260.2**.
What

is ** the confidence
coefficient** that was used.

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