The campus at Joliet Junior College has a lake.A student used a Secchi disk to measure the
Question:
The campus at Joliet Junior College has a lake.A student used a Secchi disk to measure the clarity of the lake€™s water by lowering the disk into the water and measuring the distance below the water surface at which the disk is no longer visible. The following measurements (in inches) were taken on the lake at various points in time over the course of a year.
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(a) Use the data to compute a point estimate for the population mean and population standard deviation.
(b) Because the sample size is small, we must verify that the data are normally distributed and do not contain any outliers. The ï¬gures on the next page show the normal probability plot and boxplot. Are the conditions for constructing a conï¬dence interval about m satisï¬ed?
(c) Construct a 95% conï¬dence interval for the mean Secchi disk measurement. Interpret this interval.
(d) Construct a 99% conï¬dence interval for the mean Secchi disk measurement. Interpret this interval.
Step by Step Answer:
a Using technology we obtain x 578 inches and 154 s inches b Yes The plotted points a...View the full answer
