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A survey was developed to estimate the average number of hours per week that adults spend exercising. Every third person entering a large fitness complex was surveyed, with a total of 2,500 people being surveyed. The data showed that the mean number of hours spent exercising was 3.2 hours per week. Which characteristic of the survey could create a bias in the results?
Construct a 95% confidence interval estimate of the difference between the mean response times for Company A and Company B. Interpret your interval in context of the original claim.
how many commuters must be randomly selected to estimate the mean driving time of chicago commuters? we want 98
23% of the seniors at a high school failed pre-calculus.if 1138 students failed pre-calculus, how many seniors are at t his high school?
a market researcher investigating preference for 3 brands of beverages coffee tea and cocoa in kisumu city gathered the
describe the z and t tests for comparing differences between means. explain what is needed to perform each test the
To ensure that funds will be available when needed, there will be a three month overlap period, and net proceeds from the new issue will be invested at 5% in the money market. Skyline's tax rate is 30%. Should the firm refund its existing debt?
Escher style tessellation
e 0.03. A sample of 9 players is selected at random. What is the probability that the sample contains no defective units? (Round your answer to four decimal places.)
What is a polygon? What is the difference between an equiangular polygon, an equilateral polygon, and a regular polygon? Provide an example of each.
Determine by calaction using vertex , the max height possible for a 2 m wide truck if we want to drive the truck under the bridge . Draw a digram with labeled and explain.
Also how would you find the mean for this frequency distribution?
Find the value of x & y that solve the following system of equations:
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