In a test of the Weight Watchers weight loss program, weights of 40 subjects are recorded before and after the program. Assume that the before/ after weights result in r = 0.876. Is there sufficient evidence to support a claim of a linear correlation between the before/after weights? Does the value of r indicate that the program is effective in reducing weight? Why or why not?
Answer to relevant QuestionsFor 40 eruptions of the Old Faithful geyser in Yellowstone National Park, duration times (sec) were recorded along with the time intervals (min) to the next eruption. The paired durations and interval times were used to ...a. Construct a scatterplot. b. Find the value of the linear correlation coefficient r, then determine whether there is sufficient evidence to support the claim of a linear correlation between the two variables. c. Identify ...Town Courts Listed below are amounts of court fine revenue and salaries paid to the town justices (based on data from the Poughkeepsie Journal). All amounts are in thousands of dollars, and all of the towns are in Dutchess ...Gas prices have been very volatile in recent years. The table below lists gas prices (dollars per gallon) at randomly selected Connecticut stations at the time of this writing. Is there sufficient evidence to conclude that ...Table A-6 lists critical values of r for selected values of n and a. More generally, critical r values can be found by using the formula Where the t value is found from the table of critical t values assuming a two tailed ...
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