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Market research Inc. wants to know if shoppers are sensitive to the prices of items sold in a supermarket.  One

supermarket owner claims that less than half of his consumers actually know the price of the items they are purchasing.  It obtained a random sample of 802 shoppers and found that 378 were able to state the correct price of an item immediately after putting it into their cart.  Test at the 7% level  whether the owners claim is correct.

Top Answer

There is a sufficient evidence to prove that less... View the full answer


H : P = 0.5
H : P 20 . 5
( left- tailed fest )
= 0. 07
Sample proportion, P = 2
= 0.4713
P = 0.47
test statistic -
Z =
P - P
0.4713 - 0.5
PCI - P )
0.5 ( 1- 0.5 )
2= - 1. 625

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