Question content area top

Part 1

A researcher wishes to estimate, with

9595%

confidence, the population proportion of motor vehicle fatalities that were caused by alcohol-impaired driving. His estimate must be accurate within

44%

of the population proportion.

(a) No preliminary estimate is available. Find the minimum sample size needed.

(b) Find the minimum sample size needed, using a prior study that found that

2424%

of motor vehicle fatalities that were caused by alcohol-impaired

driving.

(c) Compare the results from parts (a) and

(b).

Question content area bottom

Part 1

(a) What is the minimum sample size needed assuming that no prior information is available?

nequals=enter your response here

(Round up to the nearest whole number as needed.)