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The monthly cost of a long distance phone plan in dollars is a linear function of the total calling time in minutes. When graphed, the function gives a line with a slope of 0.11.
The monthly cost for 37 minutes of calls is $16.40. What is the monthly cost for 44 minutes of calls?
Construct a 99% confidence interval on the population mean height of all 1-year-old pine seedlings. What are the confidence limits? What statement can be made about the population mean height using the confidence interval?
At the .01 significance level can we (she) conclude that the true average daily amount of tips is greater than $80? yes or no.....
Assume that the price of non-dividend paying stock is $32, its volatility is 30%, and the risk-free rate for all maturities is 5% per annum. Use derivagem to calculate the costs of setting up the following positions.
Create a histogram showing the distribution of symptom scores in this sample. Is this a skewed distribution? If so, is it skewed to the left or to the right?
To test whether the population standard deviation differ significantly using Chi-Square test.
A researcher testing the affects of music on studying conducts a within participants design. The results are as follows: music 6,7,6,5,6,8,8, and no music 10,7,8,7,7,9,8
Assuming the sample size of 40 can be considered as large, compute the confidence interval for a confidence level of 90%.
The average score on math portion of SAT was 516 in 2002. Assume that the math score of all students taking the SAT 2002 were normally distributed with a mean of 516 and a standard deviation of 90.
Commute times: three random samples of time in minutes that commuters are stuck in traffic are shown. At anova =0.05, is there a difference in the mean times among the three cities?
The diameters of bolts produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. What percentage of bolts will have a diameter greater than 0.32 inches?
What is the average information per symbol, H(X) without any blocks being formed? What is the average information per symbol, H(X) when the blocks are formed?
Critically discuss the assumptions, if any, regarding a Chi-square test? What are the assumptions to apply linear regression?
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