Chips Challenge

Is given by sum of values in a set of data divided by number of values appearing in a set of data

The mean is equal to the sum of all the values in the data set divided by the number of values in the data set

    or             

= 52986 = 1261.57

     42

Therefore the mean number of chocolate chips per bag is 1,262 (to the nearest whole number)

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Normal probability plot

No, it is not reasonable.

The mean is vulnerable and influenced by outliers, which are unusual values. If you compare its value to others in a set of data, you may end up with values that are too small or too large.

From the charts above, there are no outliers

95% confidence interval for the mean (Note: Mean=1261.6; s=117.6)

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((1261.6 - (1.96*117.6)), ((1261.6 + (1.96*117.6))

= (1031.1, 1492.1)

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