Матеріали курсу Маркетингові дослідження (Marketing Research) [04626] та відповіді на тести | vns.lpnu.ua

A study is planned to determine the proportion

of households using the supermarket loyalty card.

Based on data from secondary survey

s, it can be estimated that 64% of

families own such a card.

Preferred accuracy is ±5%, confidence level is 95%. It is necessary to determine the sample size

for the study and the

confidence interval for the sampling parameters

454 families

; [59.1%; 68.9%], [31.1%;

40.9%]

❌

354 families

; [59.1%; 68.9%], [31.1%;

40.9%]

✅

454 families

; [72.31$; 77.69$],

[22.31$; 27.69$]

❌

354 companies; [59.1$; 68.9$], [31.1$; 40.9$]

❌

454 families

; [77.31%; 82.69%],

[17.31%; 22.69%]

❌

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