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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.
Researchers routinely choose an alpha level of 0.05 for testing their hypotheses. What are some experiments for which you might want a lower alpha level (e.g., 0.01)? What are some situations in which you might accept a higher level (e.g., 0.1)?
In testing the difference between two means from two independent populations, the sample sizes do not have to be equal to be able to use the Z statistic.
What is the probability that the sum of their scores exceeds 1200 and probability that the average of the scores of all 400 student
Construct the 90% and 95% interval estimates for the population mean weekly sales.
She collected the employee performance ratings recorded before and after workshop attendance and stored the paired ratings for all 35 in Perform.
Multiple choices based on regression analysis - how much or how many but instead is assigned values to represent categories
Assume that 5,000 sales invoices are separated into four strata. Stratum 1 contains 50 invoices, stratum 2 contains 500 invoices, stratum 3 contains 1,000 invoices, and stratum 4 contains 3,450 invoices.
A large retail corporation plans to sample sales receipts of its meat department to estimate the average size (in dollars) of a customer purchase. Previous analysis suggest that the standard deviation of the purchase amount is approximately $50.72..
Determine z score corresponding to minimum height requirement and determine z score corresponding to maximum height requirement.
Florida consumers are confident about the economy. verify the 90% confidence interval. State in a sentence the meaning of the derived confidence interval .494, .568. What would be your conclusion?
To find out the proportion of the population of likely voters who agree the statement. Could we say among appropriate statistical certainty which the proportion of the population of likely voters.
A random variable has the density curve as in the graph below. Find The height of the density curve?
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