The survival time of patients with a particular type of cancer has a mean being 7 years and
a standard deviation being 5 years. Which of the following statements must be true
(a) The distribution is bell-shaped
(b) at most 25% patients have survival time greater than 17 years
(c) about 68% patients have survival time in between 2 and 12 years
(d) at most 5% patients have survival time greater than 17 years
(e) none of the above
Could you please why please? thank you
a standard deviation being 5 years. Which of the following statements must be true
(a) The distribution is bell-shaped
(b) at most 25% patients have survival time greater than 17 years
(c) about 68% patients have survival time in between 2 and 12 years
(d) at most 5% patients have survival time greater than 17 years
(e) none of the above
Could you please why please? thank you