Author Question: A local consumer reporter wants to compare the average costs of grocery items purchased at three ... (Read 57 times)

luminitza · **on:** Feb 14, 2020

Question 1

A local consumer reporter wants to compare the average costs of grocery items purchased at three different supermarkets, A, B, and C. Prices (in dollars) were recorded for a sample of 60 randomly selected grocery items at each of the three supermarkets. In order to reduce item-to-item variation, the prices were recorded for each item on the same day at each supermarket.

Identify the treatments for this experiment.
◦ the day on which the data were collected
◦ the 60 × 3 = 180 prices
◦ the three supermarkets
◦ the 60 grocery items

Question 2

A local consumer reporter wants to compare the average costs of grocery items purchased at three different supermarkets, A, B, and C. Prices (in dollars) were recorded for a sample of 60 randomly selected grocery items at each of the three supermarkets. In order to reduce item-to-item variation, the prices were recorded for each item on the same day at each supermarket.

Identify the dependent (response) variable for this experiment.
◦ the grocery items
◦ the supermarkets
◦ the prices of the grocery items
◦ the mean prices of the grocery items at each supermarket

nguyenhoanhat · **Reply #1 on:** Feb 14, 2020

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