When there is no prior information for the population proportion, then the formula we use to find the sample size to estimate the confidence interval :

$n=0.25(\dfrac{z^*}{E})^2$ , where z* = Critical z-value and E + amrgin of error.

Let p = proportion of packages of ground beef sold at a particular store that have an actual fat content exceeding the fat content stated on the label.

Since , we have no prior information about p. so we use above formula

with E = 0.06 and critical value for 95% confidence =z* =1.96 [By z-table ] , we get

$n=0.25(\dfrac{1.96}{0.06})^2=0.25(32.6666)^2\\\\=(0.25)(1067.111111)\\\\=266.777777778\approx267$

Hence, the required sample size is 267.

7 0

3 years ago

Answer this question for points

Arte-miy333 [17]

Answer:

102 or the 12th number considering 38 is the 4th

3 0

2 years ago

3.5 In triangle PQR below, QR=5.5 cm and QŘP=60° calculate the length of PR​

3.5 In triangle PQR below, QR=5.5 cm and QŘP=60° calculate the length of PR