Question

In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA...

In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 250. What is the probability that the sample proportion will be at least 2 percent more than the population proportion? Note: You should carefully round any z-values you calculate to at least 4 decimal places to match wamap's approach and calculations.

Homework Answers

Answer #1

given data are sample n =250

population proportion p = 0.75

sample proportion is atleast 2% more than the population proportion. so sample proportion = 0.75+0.02=0.77

i.e given -p=0.02

let find z=

where q=1-p=1-0.75=0.25

then z=0.02/

z=0.02 / 0.0274

=0.7303

p (atleast 2%)= p (z0.7303)

=1-p (z <0.7303)

=1- 0.7674

=0.2326

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 154. What...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 130. What...
In a recent year, the Better bureau settled 75% of complaints they received. (source: USA Today,...
In a recent year, the Better bureau settled 75% of complaints they received. (source: USA Today, March 2, 2009). You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complains settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 121. What is...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 276. What...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 196. What...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 130. What...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 161. What...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 198. What...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 218. What...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA...
In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 120. What...