Sample Size for a Mean

What sample size is required to estimate the mean amount of Dawn dish soap in 20.0 oz bottle with 90% confidence if = 0.15 oz and keeping error within +/- 0.01 oz?

Possible Answers:

300

609

3290

25

Q5:Sample Size for a Proportion

As a cookie dough analyst, you need to determine the sample size required to estimate the proportion of double chocolate chunk cookie dough weighing less than 10 lbs with 80% confidence and the error within 1.25% when initial estimate shows = 0.60?

Possible Answers:

4157

5901

1537

2525