Q1. Determine the minimum sample size required when you want to be 95%
confident that the sample mean is within two units of the population
mean. Assume a population standard deviation of 4.3 in a normally
distributed population.
Homework Help:
5VB. Calculating minimum sample size (Links to an external site.) (1:52)
5DG. Why set a minimum sample size (DOCX)
20 22
16 Correct! 18
correct answer is 18
Q.2 Under a time crunch, you only have time to take a sample of 15 water
bottles and measure their contents. The sample had a mean of 20.05
ounces with a sample standard deviation of 0.4 ounces. What would be the
90% confidence interval, when we assumed these measurements are
normally distributed?
Homework Help:
5VE. Confidence intervals with sample standard deviationLinks to an external site. (1:37)
(19.88, 20.22) (19.91, 20.19)
Correct! (19.87, 20.23)
(19.65, 20.45) correct answer is (19.87, 20.23)
