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A television station estimates that 60% of college students watch the Super Bowl. For a sample of 120 students selected at random, what is the mean and variance of the number of students who watch this game?
Test whether there is difference in the proportion of viewers using Chi square test.
Compute the range and interquartile range
Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. (Round your answer to two decimal places.)
The average price of a home is reported to be $203,190. Use this price as the population mean, and assume the population standard deviation is 43,890.
Events A and B are mutually exclusive events defined on common sample space. If P (A) 0.5 and P (A or B) = 0.70, determine P (B).
Build a scatter plot, Find the value of the linear correlation coefficient r, and find the critical value of r using α=0.05. Determine whether there is sufficient evidence to support a claim of a linear correlation between the two variables.
Let X1,... x30 be independent Poisson random variables having mean 1. (a) Use Chebyshev's inequality to find a lower bound on the probability.
Your fixed costs are presently $500,000 with a variable cost per unit of $25 per unit and a sales price of $43 Your options are: Increase your fixed costs by $50,000 which will decrease variable costs by $8 per unit.
If one of these consumers is randomly selected, what is the probability that the person prefers design A and is under 25?
In a study, the carapace lengths (in mm) of Thenus lobster caught near Singapore measured: 78,66,65,63,60,60,58,56,52 and 50 ( the population data is approximately normal).
Statisticians prefer large samples. Describe briefly the effect of increasing the size of a sample on each of the following: The margin of error of a 95% confidence interval?
Whether regression can be used to estimate the Demand from other data in the file. So that Howies can determine the daily supply in a more cost effective way.
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