Suppose you own a factory. You want to determine whether the level of illumination on the...

Suppose you own a factory. You want to determine whether the level of illumination on the assembly line affects worker productivity. One day, you have one group of 5 employees work under very dim lighting, a second group of 5 employees work under a moderate level of light, and a third group of 5 employees work under very bright lights. The mean productivity (number of units assembled) for the low light group was 56; for the moderate light group, 68; for the bright light group, 60.

a) Conduct a Tukey’s HSD test to test the differences between all possible pairs of sample means at the .05 level of significance and complete the following table.

b) What is the value of Q_CRIT?

c) Which pairs of sample means are significantly different?

Comparison	l x̄ - x̄ l	Q
Low – Moderate
Moderate – Bright
Low – Bright

Expert Solution

ANSWER::

a)

b)

c)

Low-Moderate pairs of sample means are significantlu different due to the mean difference is greater than critical value of Tukey HSD which is 11.93 which is 12 from part (a)

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orchestra answered 2 years ago

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