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Find the Pearson correlation coefficient for the following set of data using the computational formula from the tutorial. Are these sample data sufficient to reject H0: r = 0 for ? = 0.05, two-tailed? What proportion of the variance in Y is accounted for by its relation to X? Be sure to show your work.1.. What is your value for r?2. Is your calculated value for r sufficient to reject H0: r=0 for alpha =0.05, two tailed, and what is the critical value for r?3. What proporation of the variance in Y is accounted for by its relation to X?X Y2 103 85 49 16 95 87 43 60 710 10
A researcher claims that the average age of people who buy lottery tickets is 70. A sample of 30 is selected and their ages are recorded as shown below. The standard deviation is 16. At alpha = 0.05 is there enough evidence to reject the researche..
You're operating a business in very competitive market. You're not yet the dominant player, but you have invested heavily in marketing and product development and it has paid off with a steady growth rate of 10%.
Test the hypothesis, at the 0.05 level of significance, that the size of a family is independent of the level of education attained by the father.
A window is in the shape of a square of side s, witha semicircle of diameter s above it. Please help me unable to figure out how to write a function that express the total area of the window as a function of s
She then selects a sample of 102 football players and finds that their average math SAT is 460. Use alpha =.01 to perform the appropriate hypothesis test.
Calculate the mean number and median number of apples in a bag.
There are 72 data values altogether. The degrees of freedom for the Between(dfB) and the degrees of freedom for the With-in (dfW) are?
Write the Lagrangian for a one-dimensional particle moving along the x-axis and subject to a force F=-kx (with k possitive). Find the lagrange eqn of the motion and solve it.
Identify 5 variables of interest to healthcare managers. Select and define one variable and include your rationale for selecting this variable. What is the difference between a dependent and independent variable?
What is the P-value of the test, assume the standard deviation is 3 years, a 95% confidence interval for the average time
In a research study, what does statistically significant mean? How are decisions made on data based on significance? What do you do with data that is not significantly different?
The average burglary rate for a particular jurisdiction has been 311 per year with a standard deviation of 50. What is the likelihood that the number of burglaries in the next year is between 250 and 300?
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