# Statistics Assignment | Professional Writing Services

A family-owned candy company recently hired many new staff members to deal with an increase in demand. They have a day shift (Team A) and a night shift (Team B). Although they are quite happy with their new employees they suspect that some of them may be eating chocolates when they are not looking.

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Their signature box weighs 1.87 kgs.

They randomly sampled 9 boxes from Team B and found that on average they weighed 1.37 kgs.

Using the data they collected, the family would like to test whether μ

μ, the mean weight of chocolate per box, is less than their original signature box.

Suppose that the weight of chocolate per box is normally distributed with a standard deviation σ=.75kg

σ=.75kg.

Which of the following is the correct test-statistic in this case?

z = .67

z = -2

z = -4

z = 1.33

z = 2

z = 4

z = -.67

z = -1.33

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