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You are given the following data.
Number of Absences Final Grade0 931 932 773 684 655 54
1. Find the correlation coefficient for the data.
2. Find the equation for the regression line for the data and predict the final grade of a student who misses 3.5 days.
the null hypothesis is to be tested at 95% confidence. Determine the critical value(s) for this test.
The sample proportion of large gloves for each location is and . (Round your answers to 4 decimal places.)
What assumption about the population distribution is needed in order to conduct the t test in (a)?
Polls showed the two main candidates in 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has a margin of error of less than 1%.
Determine and plot the probability mass function and probability distribution function of the contract award amount (in millions of dollars).
Determine the minimum required sample size if you want to be 99% confident that the sample mean is within 2 units of the population mean given sigma = 7.8. Assume the population is normally distributed.
For the samples summarized below, test the hypothesis at ∞ =.05 that the two variances are equal. Variance Number of data values Sample 1 19 8 Sample 2 9 18
Determine x-bar and s for this data set. You may suppose the values for bulb life are normally distributed. Use traditional method to make your decision.
Based on these results, a confidence interval for the population mean is found to be μ = 5.7 ± 4.4. Find the degree of confidence.
What is the 95% confidence interval estimate of the mean television viewing time per week during the 8:00 p.m. to 11:00 p.m. time period?
Which are likely to be independent events? For those you think are not, suggest reasons why.
the probability that a household is both prosperous and educated is P (A and B) = 0.082. What is the probability P (A or B) that the household selected is either prosperous or educated.
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