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

Question

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

Accepted Answer

354  families ; [59.1%; 68.9%], [31.1%;
40.9%]

Answer

454  families ; [59.1%; 68.9%], [31.1%;
40.9%]

Answer

454  families ; [72.31$; 77.69$],
[22.31$; 27.69$]

Answer

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

Answer

454  families ; [77.31%; 82.69%],
[17.31%; 22.69%]

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A study is planned to determine the proportion of households using the supermark...

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