A polling agency is investigating the voter support for a ballot measure in an upcoming city election. The agency will select a random sample of 500 voters from one region, Region A, of the city. Assume that the population proportion of voters who would support the ballot measure in Region A is 0.47. Ђор (a) What is the probability that the proportion of voters in the sample of Region A who support the ballot measure is greater than 0.50 ? 1) normal (Sketch curve) 7-score Ssed
A polling agency is investigating the voter support for a ballot measure in an upcoming city election. The agency will select a random sample of 500 voters from one region, Region A, of the city. Assume that the population proportion of voters who would support the ballot measure in Region A is 0.47. Ђор (a) What is the probability that the proportion of voters in the sample of Region A who support the ballot measure is greater than 0.50 ? 1) normal (Sketch curve) 7-score Ssed
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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how would you do part A of this frq? ignore my answer, i was just writing random stuff down. this is a non graded practice frq

Transcribed Image Text:Z>P
(a) What is the probability that the proportion of voters in the sample of Region A who support the ballot measure
is greater than 0.50 ?
Z-score
1) normal (Sketch curve)
2) Check large counts
0.0869
Z
np=500 (47) 235 ≥10
n(1-P) = 500 (,53)-2657 10
μ
he's
A polling agency is investigating the voter support for a ballot measure in an upcoming city election. The agency
will select a random sample of 500 voters from one region, Region A, of the city. Assume that the population
proportion of voters who would support the ballot measure in Region A is 0.47.
Presse
W47, 0223)
ww
475
P=P =0₁47
NBPB=400(151) - 204
ng (1-PB) = 400(149)
こ
PA-P)
VT=
p=√√ PO
147.53
47653)
500
The polling agency will take another sample from a different region, Region B, of the city. The agency plans to
select a random sample of 400 voters. Assume that the population proportion of voters who would support the
ballot measure in Region B is 0.51.
(b) Describe the sampling distribution of the difference in sample proportions (Region B minus Region A).
too
because
Region A has
a
bigger sample,
=0223
state that it's
1) normou
2) mean
(c) What is the probability that the two sample proportions will differ by more than 0.05 ?
1-.51 =.49
approx.
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