A child puts one five-rupee coin of her saving in the piggy bank on the first day. She increases her saving by one five-rupee co
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Answer:
Step-by-step explanation:
The confidence interval to estimate the population mean is given by :_
Given : Sample size : n= 60 , the sample is a large sample (n>30), so we can apply z-test.
Sample mean =
Standard deviation :
Level of confidence:
Then, critical z-value =
Then, a 95% confidence interval estimate of the population mean will be
Hence, the 95% confidence interval to estimate the population mean = .