Data Set Test Claim

Use the data set below to test the claim that more than 50% of the are at least 415.

data set 350,527,480,410,360,470,390,510,430,452,341,385,380,409,500,377,400,380,420,460

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This is your actual average.

Then, you have to calculate the standard deviation.

To do this, you have to take each number, subtract it from the average of the group, and then square that number
= (350-average)squared + (527-average) squared + ....... + (460 - average) squared.

Then you take that added value and you divide it by the sample size. Then you have the standard ...