HW Ch. 12 6 Saved Help Save & Exlt S Each of three supermarket chains in the Denver area claims to have the lowest overall prices. As part of an investigative study on supermarket advertising, a local television station conducted a study by randomly selecting nine grocery items. Then, on the same day an intern was sent to each of the three stores to purchase the nine items. From the receipts, the following data was recorded. At the 0.05 significance level, is there a difference in the mean price for the nine items between the three supermarkets? Item Super's Ralph's Lowblaws $1.12 1.14 1.72 2.22 2.40 4.04 5.05 4.68 5.52 $1.02 1.10 1.97 2.09 2.10 4.32 4.95 4.13 5.46 $1.07 1.21 2.08 2.32 2.30 4.15 5.05 4.67 5.86 12.5 points 02:25:54 8 9 eBook References 1. State the null hypothesis and the alternate hypothesis For Treatment (Stores): Null hypothesis HW Ch. 12 6 Saved Help Save & Exlt S Each of three supermarket chains in the Denver area claims to have the lowest overall prices. As part of an investigative study on supermarket advertising, a local television station conducted a study by randomly selecting nine grocery items. Then, on the same day an intern was sent to each of the three stores to purchase the nine items. From the receipts, the following data was recorded. At the 0.05 significance level, is there a difference in the mean price for the nine items between the three supermarkets? Item Super's Ralph's Lowblaws $1.12 1.14 1.72 2.22 2.40 4.04 5.05 4.68 5.52 $1.02 1.10 1.97 2.09 2.10 4.32 4.95 4.13 5.46 $1.07 1.21 2.08 2.32 2.30 4.15 5.05 4.67 5.86 12.5 points 02:25:54 8 9 eBook References 1. State the null hypothesis and the alternate hypothesis For Treatment (Stores): Null hypothesis