Suppose a sales department gets an average of 20.1 complaints per week with a population standard deviation of 1.4 complaints. Based on the complaints, the manager suspects cultural diversity training will help. Everyone takes the training. The manager notices that after the training, the complaints drop to 18.9 per week (based on five weeks, or n=5). What's the absolute value of your calculated value? Round your answer to two decimal places.

Step-by-step explanation:

The null hypothesis is that the average number of complaints per week is 20.1

If H₀ =  Null hypothesis

H₀:  μ = 20.1

After the training, the complaints drop to 18.9 < 20.1. This means that the alternative hypothesis,

To know if the alternative hypothesis is true, we need to calculate the absolute z value using the test statistic

number of days, n = 5

Standard deviation,

z = -1.92

step-by-step explanation:

here's what happens:

1) the graph of f   = x^2 is shifted 2 units to the right.

2) the resulting graph is reflected in the x-axis, so that the parabola now opens down.

3) this final result is transformed up by 5 units.