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A candidate must gather at least 8,000 valid signatures on a petition before the deadline in order to run in an election. One candidate turns in 10,000 signatures right before the deadline, but it's always expected that some percentage of them are invalid. Election officials take a random sample of 100 signatures and thoroughly investigate them to find that 84% are valid. Is this statistically significant evidence that the candidate has enough valid signatures overall? Explain.
Tompkins Associates reports that the mean clear height for a Class A warehouse in the Unites States is 22 feet. Suppose clear heights are normally distributed and that the standard deviation is 4 feet.
The amounts dispensed by a cola machine follow the normal distribution with a mean of 7 ounces and a standard deviation of 0.10 ounces per cup.
Many people attend work and produce little or nothing of value that is why they are terminated.
Would the null hypothesis be accepted or rejected in this case?
She collected the employee performance ratings recorded before and after workshop attendance and stored the paired ratings for all 35 in Perform.
Use the given confidence level and sample data to find a confidence interval for estimating the population mean
From her district, consisting of several hundred stores, she selects a random sample of 30 stores. For each store she gathered the following information.
A local health center noted that in a sample of 400 patients 80 were referred to them by the local hospital. a) Provide a 95% confidence level for all the patients who are referred to the health center by the hospital.
If we select a crew member at random, what is the probability the crew member earns:
The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample men and population mean for a sample of n = 100 is 2 points. Explain the difference in the standard error for the two sampl..
To speed up the process in a blood testing procedure, blood samples from 3 people are combined into one mixture. The mixture will only test negative if all the individual samples are negative.
Create a 95% confidence interval for the population mean days absent for sickness based on this sample. Select the answer closest to your results.
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