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Thread: Intervals

  1. #1
    Mar 2009



    Im having trouble completing the question can you please help me? (ive attached the PONDICE file).

    Refer to the National Snow and Ice Data Centre (NSIDC) collection of data on the albedo, depth, and physical characteristics of ice-melt ponds in the Canadian Arctic. Albedo is the ratio of the light reflected by the ice to that received by it. (High albedo values give a white appearance to the ice.)

    Environmental engineers at the University of Colorado are using these data to study how climate affects the sea ice. Data on 504 ice melt ponds located in the Barrow Straight in the Canadian Arctic are saved in the PONDICE file. Another variable of interest is the type of ice observed for each pond, classified as first-year ice, multiyear ice, or landfast ice.

    a. Find a 90% confidence interval for the truce mean visible albedo value of all Canadian Arctic
    ice ponds.

    b. Give the conditions required for the interval in (a).

    c. Give an appropriate interpretation of the interval in (a)

    d. Find 95% confidence intervals for the mean visible albedo for each of the three types of ice.
    Interpret the intervals.

    Ive got question A): 0.35, 0.37

    Please Help

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