Answer:
The average walking speed is 1.48 feet per second
Step-by-step explanation:
we have
where
r is average walking speed
p is the population in thousands
In this problem we have
----> because p in the equation is in thousands
substitute the value of p in the equation
using a calculator
Answer: 0.6274
Step-by-step explanation:
Given: The proportion of patients experience injection-site reactions with the current needle : p=0.11
Sample size : n= 4
Let x be a binomial random variable that represents the people get an injection-site reaction.
Binomial probability formula:
The required probability : P(x=0)
Hence, the probability that none of the 4 people get an injection-site reaction = 0.6274