A Food Marketing Institute found that 30% of households spend more than $125 a week on groceries. Assume the population proportion is 0.3 and a simple random sample of 155 households is selected from the population. What is the probability that the sample proportion of households spending more than $125 a week is between 0.21 and 0.4?
A Food Marketing Institute found that 30% of households spend more than $125 a week on groceries. Assume the population proportion is 0.3 and a simple random sample of 155 households is selected from the population. What is the probability that the sample proportion of households spending more than $125 a week is between 0.21 and 0.4?
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
Related questions
Question
100%
Transcribed Image Text:A Food Marketing Institute found that 30% of households spend more than $125 a week on
groceries. Assume the population proportion is 0.3 and a simple random sample of 155 households
is selected from the population. What is the probability that the sample proportion of households
spending more than $125 a week is between 0.21 and 0.4?
Note: You should carefully round any z-values you calculate to 4 decimal places to match wamap's
approach and calculations.
Answer =
(Enter your answer as a number accurate to 4 decimal places.)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
Recommended textbooks for you