How many card holders should be sampled

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Q1. Universal Credit Inc. would like to examine the necessary sample size needed to be able to estimate the mean dollars that each card holder will spend each month. It would like to be within plus or minus $25 of the true mean with a 98 percent confidence level. The standard deviation is thought to be $400. How many card holders should be sampled? Your company charges a set dollar amount for each account in sample.

Q2. If a pea plant that is heterozygous for round, yellow peas (RrYy) is crossed with a pea plant that is homozygous for round peas but heterozygous for yellow peas (RRYy), how many dissimilar phenotypes are their offspring expected to show?

Reference no: EM136467

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