Question

In: Statistics and Probability

DO NOT ANSWER IF YOU ARE UNSKILLED IN THIS AREA! THE DATA CHART IS CORRECT &...

DO NOT ANSWER IF YOU ARE UNSKILLED IN THIS AREA! THE DATA CHART IS CORRECT & COMPLETE!

Exercise 14-9 Algo

A realtor studies the relationship between the size of a house (in square feet) and the property taxes (in $) owed by the owner. The table below shows a portion of the data for 20 homes in a suburb 60 miles outside of New York City. [You may find it useful to reference the t table.]

Property Taxes Size
21870 2467
17456 2493
18105 1876
15685 1055
43905 5603
33687 2518
15266 2257
16800 1989
18274 2025
16798 1343
15181 1371
36065 3003
31060 2816
42186 3362
14359 1544
38917 4064
25393 4083
22953 2469
16184 3587
29268 2860

Property Taxes Size
21,870 2,467
17,456 2,493
29,268 2,493

a-1. Calculate the sample correlation coefficient rxy. (Round intermediate calculations to at least 4 decimal places and final answers to 4 decimal places.)

Sample correlation coefficient

a-2. Interpret rxy.

  • The correlation coefficient indicates a positive linear relationship.

  • The correlation coefficient indicates a negative linear relationship.

  • The correlation coefficient indicates no linear relationship.

c-1. Calculate the value of the test statistic. (Round intermediate calculations to at least 4 decimal places and final answer to 3 decimal places.)

Test statistic

Solutions

Expert Solution

Property Taxes (X) Size (Y) X * Y
21870 2467 53953290 4.78E+08 6086089
17456 2493 43517808 3.05E+08 6215049
18105 1876 33964980 3.28E+08 3519376
15685 1055 16547675 2.46E+08 1113025
43905 5603 2.46E+08 1.93E+09 31393609
33687 2518 84823866 1.13E+09 6340324
15266 2257 34455362 2.33E+08 5094049
16800 1989 33415200 2.82E+08 3956121
18274 2025 37004850 3.34E+08 4100625
16798 1343 22559714 2.82E+08 1803649
15181 1371 20813151 2.3E+08 1879641
36065 3003 1.08E+08 1.3E+09 9018009
31060 2816 87464960 9.65E+08 7929856
42186 3362 1.42E+08 1.78E+09 11303044
14359 1544 22170296 2.06E+08 2383936
38917 4064 1.58E+08 1.51E+09 16516096
25393 4083 1.04E+08 6.45E+08 16670889
22953 2469 56670957 5.27E+08 6095961
16184 3587 58052008 2.62E+08 12866569
29268 2860 83706480 8.57E+08 8179600
Total 489412 52785 1.45E+09 1.38E+10 1.62E+08

There is positive and moderate relationship between two variables.

Test Statistic :-


t = 4.792



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