There is always a need for people to donate blood. College s…
There is always a need for people to donate blood. College students often volunteer when there are blood drives on campus. A survey is conducted to determine the percentage of students who have a negative blood type (O-, A-, B- or AB-) as they exit the bloodmobile. The 95% confidence interval for the percentage of students who reported a negative blood type is (12.4%, 17.7%). Complete parts a and b. a.) Interpret the meaning of this confidence interval using a complete sentence. b.) What would be the sample size required to estimate the percentage of students who reported a negative blood type? Assume no prior studies were made and we need to be within an error of 3%.
Read DetailsThe following data describe a survey of 150 registered voter…
The following data describe a survey of 150 registered voters in order to study the relationship between party affiliation and support for certain bill. Answer parts a, b and c, round all answers to three decimals. For Against No Opinion TOTAL Democrat 37 16 5 58 Republican 13 34 7 54 Independent 7 11 20 38 TOTAL 57 61 32 150 a.) What is the probability a registered voter is Democrat or is For the bill? [a] b.) What is the probability that a registered voter is against the bill given they are Republican? [b] c.) What is the probability that if two registered voters are selected without replacement, they are both For the bill? [c]
Read DetailsThe nutritional rating was measured for cereals sold by Post…
The nutritional rating was measured for cereals sold by Post and Nabisco. A higher rating indicates better nutritional value. The results are shown in the following box plots. Complete parts a and b. a.) Which manufacturer has more variation in nutritional rating? Explain why. b.) Which manufacturer has a higher nutritional rating? Explain why.
Read DetailsThe following is a probability distribution of the number of…
The following is a probability distribution of the number of cars (X) owned by 120 residents who live in the same neighborhood. What is the mean and standard deviation of the number of cars owned by the 120 residents? X (Number of Cars) 1 2 3 4 5 P(X) 0.01 0.33 0.36 0.22 0.08
Read Details 
				 
				 
				