In the coastal united states, there is an established correlation between ice cream sales and shark attacks. which of the following might we conclude from this data?
a. eating ice cream may increase the likelihood of a shark attack.
b. increases in shark attacks may increase ice cream sales.
c. this is an anomaly and there is no relationship between shark attacks and ice cream sales.
d. there may be a third variable that creates a link between ice cream sales and shark attacks.

What is the difference between an observational study and an​ experiment? choose the correct answer below. a. in an​ experiment, a treatment is applied to part of a population and responses are observed. in an observational​ study, a researcher measures characteristics of interest of a part of a population but does not change existing conditions. b. in an​ experiment, a treatment is applied to an entire population and responses are observed. in an observational​ study, a researcher measures characteristics of interest of an entire population but does not change existing conditions. c. in an​ experiment, a researcher measures characteristics of interest of a part of a population but does not change existing conditions. in an observational​ study, a treatment is applied to part of a population and responses are observed. d. in an​ experiment, a researcher measures characteristics of interest of an entire population but does not change existing conditions. in an observational​ study, a treatment is applied to an entire population and responses are observed.