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 asuburb 60 miles outside of New York City. [You may find ituseful to reference the t table.]
Property Taxes | Size |
21892 | 2498 |
17421 | 2419 |
18170 | 1877 |
15679 | 1011 |
43962 | 5607 |
33657 | 2575 |
15300 | 2248 |
16789 | 1984 |
18108 | 2021 |
16794 | 1311 |
15113 | 1327 |
36069 | 3033 |
31058 | 2871 |
42126 | 3346 |
14392 | 1533 |
38911 | 4032 |
25323 | 4041 |
22972 | 2446 |
16160 | 3596 |
29215 | 2871 |
a-1. Calculate the sample correlationcoefficient rxy. (Round intermediatecalculations to at least 4 decimal places and final answers to 4decimal places.)
a-2. Interpret rxy.
a. The correlation coefficient indicates a positive linearrelationship.
b. The correlation coefficient indicates a negative linearrelationship.
c. The correlation coefficient indicates no linearrelationship.
b. Specify the competing hypotheses in order todetermine whether the population correlation coefficient betweenthe size of a house and property taxes differs from zero.
a. H0: Ïxy = 0;HA: Ïxy ≠0
b. H0: Ïxy ≥ 0;HA: Ïxy < 0
c. H0: Ïxy ≤ 0;HA: Ïxy > 0
c-1. Calculate the value of the test statistic.(Round intermediate calculations to at least 4 decimalplaces and final answer to 3 decimal places.)
c-2. Find the p-value.
a. p-value < 0.01
b. p-value  0.10
c. 0.05Â Â p-value < 0.10
d. 0.02Â Â p-value < 0.05
e. 0.01Â Â p-value < 0.02
d. At the 5% significance level, what is theconclusion to the test?
a. Reject H0; we can state size and propertytaxes are correlated.
b. Reject H0; we cannot state size andproperty taxes are correlated.
c. Do not reject H0; we can state size andproperty taxes are correlated.
d. Do not reject H0; we cannot state sizeand property taxes are correlated.