# Question: Determine the sample size needed to construct a 90 confidence

Determine the sample size needed to construct a 90% confidence interval to estimate the population proportion when p = 0.65 and the margin of error equals 6%.

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Determine the sample size needed to construct a 95% confidence interval to estimate the population proportion for the following sample proportions when the margin of error equals 4%: a. p = 0.30 b. p = 0.40 c. p = 0.50 Red Fire Grill would like to estimate the proportion of tips that exceed 18% of its dinner bills. Without any knowledge of the population proportion, determine the sample size needed to construct a 90% interval with a margin ...Radon is a colorless and odorless radioactive gas that can accumulate in residential homes. High levels of exposure can lead to health problems such as lung cancer. Radon levels are measured in units of picocuries per liter ...The makers of compact fluorescent light bulbs (CFL) claim the bulbs use 75% less energy and last 10 times longer than incandescent bulbs. A 16 watt CFL (equivalent to a 60 watt incandescent) has a rated lifetime of 8,000 ...Construct a 90% confidence interval to estimate the population mean using the following data: = 85 σ = 20 n = 10 What assumptions need to be made to construct this interval?Post your question