A sales manager for an advertising agency believes there is a relationship between the number of contacts and the amount of the sales.To verify this belief,the following data was collected: 
What is the value of the coefficient of correlation?
Definitions:
Chlamydia
A sexually transmitted infection caused by the bacterium Chlamydia trachomatis, often asymptomatic but treatable with antibiotics.
Gonorrhea
A bacterial infection that is sexually transmitted and can infect the genitals, rectum, and throat.
Bacteria
Microscopic, single-celled organisms that inhabit virtually all environments, including soil, water, organic matter, and the bodies of plants and animals.
Ectopic Pregnancy
A pregnancy in which the fertilized ovum is implanted in any tissue other than the uterine wall. Most ectopic pregnancies occur in the fallopian tubes. Also known as a tubal pregnancy.
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