Discussion:
Q: In a study, the carapace lengths (in mm) of Thenus lobster caught near Singapore measured: 78,66,65,63,60,60,58,56,52 and 50 ( the population data is approximately normal).
Find:
a. The sample mean
b. The 80% confidence intervals for the population mean=
c. The 50% confidence intervals for the population mean=
d. The 98% confidence intervals for the population mean=
e. How many would they need to sample to be 95% sure to be within 0.2 of the population mean?
f. How many more (than the original 10) would they need to sample to be 86% sure to be withing .3 of the population mean?