A researcher wishes to estimate, with

95%

confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within

44%

of the true 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

78%

of the respondents said they support labeling legislation for

GMOs.

(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=

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