Answer:
Step-by-step explanation:
Here population is the people as a whole who use telephone.
Sample is the 118 people with eye cancer surveyed and 475 in control group without the disease.
b) Family history, parents having cancer, other habits such as smoking, or alcohol are lurking variables.
c) We can generalize the findings to all people by
i) increasing sample size. The maximum sample size the less the error.
ii) Samples taken at strictly random procedure without any bias
iii) samples taken over a spread population of various regions, countries, cultures, food habits, etc.
iv) Grouping into persons with smoking, with alcohol, etc will improve the results by reducing the variation due to lurking variables.
