Find the upper value for a 98% con dence interval


A market research analyst would like to estimate intervals for the average weekly household expenditure on groceries in Stat City. She gets a random sample of 49 Stat City households, and nds the sample mean to be $180.00 and a sample standard deviation of $35.00.
Find the upper value for a 98% Con dence Interval for .
Find the lower value for a 90% Con dence Interval for

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Basic Statistics: Find the upper value for a 98% con dence interval
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