Find a 90 confidence interval for the true variance visible

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Reference no: EM13617169

1. The National Snow and Ice Data Center (NSIDC) collects data on albedo, depth, and physical characteristics of ice melt ponds in the Canadian Arctic. Albedo is the ratio of the light reflected by ice to that received by it. (High albedo values give a white appearance to the ice.) Visible albedo values are recorded for a sample of 504 ice melt points located in the Canadian Arctic. These data are saved in the ICE sheet of provided data file. Another variable of interest is the type of ice observed for each pond. Ice type (column F) is classified as first-year ice (represented as the number 1), multiyear ice (2), or landfast ice (3).

a. Construct a summary table and a horizontal bar graph to describe the ice types of the 504 melt ponds.

b. Find a 90% confidence interval for the true mean visible albedo value of all Canadian Arctic ice ponds in column L to T.

c. Find a 90% confidence interval for the true variance visible albedo value of all Canadian Arctic ice ponds in column L to T.

d. What is the interpretation of the intervals gotten in (b) and (c)?

Reference no: EM13617169

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