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Question: Safety. Observers in Texas watched children at play in eight communities. Of the 814 children seen biking, roller skating, or skateboarding, only 14% wore a helmet.
a) Create and interpret a 95% confidence interval.
b) What concerns do you have about this study that might make your confidence interval unreliable?
c) Suppose we want to do this study again, picking various communities and locations at random, and hope to end up with a 98% confidence interval having a margin of error of How many children must we observe?
a. What is the probability that the person both thinks that ?Made in America? ads boost sales and uses social media online?
What would you recommend Taylor do to cut back its labor cost? (Illustrate using an ABC plan.)
Vote against a proposed pay increase. 320 would vote FOR while 1280 would vote against the proposal. Construct a 95.44% confidence interval for the proportion voting against the proposal.
deliverable length 2 - 3 pages in ms worddescribe a situation in your business or personal life that required research.
A marble is selected at random from a jar containing 6 red marbles, 5 yellow marbles, and 4 green marbles. What is the probability that the marble is red
A test of 45 capsules had a mean weight of 20.9 milligrams and a standard deviation of 0.3 milligrams. Test the makers claim at the 95% confidence level.
Question: What are two potential extraneous variables you need to be careful to consider?
Using the population standard deviation of 1.4 ounces, find the sample size required if we want our margin of error to be less than 0.25 ounces with 95% confidence.
A personnel office is gathering data regarding working conditions. Employees are given a list of five conditions that they might want to see improved. They are asked to select the one item that is most critical to them.
the compressive strengths of a random sample of 64 specimens of an alloy yielded sample average strength of 5566 psi
Produce the scatter plot for sodium and bp. Do you think there are any outliers?
a jobs are sent to a printer at an average of 4 jobs per hour.i what is the expected time between jobs?ii what is the
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