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(Solution Library) A long term study of changing environmental conditions in Chesapeake Bay found the following annual average salinity readings in one location in

Question: A long term study of changing environmental conditions in Chesapeake Bay found the following annual average salinity readings in one location in the bay (Excel exam file; worksheet Question 3):

Year 1971 1972 1973 1974 1975 1976 1977
Salinity (%) 14 9.3 15.2 14.7 15.1 13.8 15.9
Year 1978 1979 1980 1981 1982 1983 1984
Salinity (%) 15.7 15.4 13.4 17.5 19.7 15.6 15.8
  1. Make a plot of salinity against time. Was salinity generally increasing or decreasing
    over these years? Is there an overall straight line trend over time?
  2. What is the correlation between salinity and year/ What percentage of the observed
    variation in salinity is accounted for by straight line change over time?
  3. Find the least squares regression line for predicting salinity from year. Explain in
    simple language what the slope of this line tells you about Chesapeake Bay.
  4. If the trend in these past data had continued, what would be the average salinity at this

point in the bay in 1988?

Price: $2.99
Solution: The downloadable solution consists of 4 pages
Deliverable: Word Document


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