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Scatter plot, Correlation coefficient and Regression equation.
Do a complete regression analysis by performing the steps below.
Note: No regression should be done when r is not significant.
a. Draw a scatter plot.
b. Compute the correlation coefficient.
c. State the hypotheses.
d. Test the hypotheses at .
e. Determine the regression line equation (if applicable).
f. Plot the regression line on the scatter plot (if applicable).
g. Summarize the results.
The data below were obtained for the years 1993 through 1998 and indicate the number of fireworks (in millions) used and the related injuries. Predict the number of injuries (provided there is a significant relationship) if 100 million fireworks are used during a given year.
Iit is known that signal change in this brain area is normally distributed with mean of 35 and standard deviation of 10. By using .01 level, what must researcher conclude?
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be:
Place the steps below in the correct order for the construction of a control chart.
Using goodness-of-fit test and.01 level of significance, find out whether accidents are evenly distributed all through the day. Write a short description of your conclusion.
How many units of capacity should be built to minimize the total cost of providing capacity plus lost sales?
Assume that Leo advertises "If it takes more than 30 minutes to get your pizza, you get it free". What percentage of his take-out pizzas will have to give away free?
Calculate separately for 1983 and 1987, the 95% confidence interval for the proportion of students who had driven an automobile while drinking.
What is the null hypothesis? Use a = 0.05 .
Suppose we wish to predict the crawling age of a particular baby when the average outdoor temperature is 25°F six months after birth.
At the 5% level of significance, can we infer that the population mean weight of athletic men is lower than the population mean weight of non-athletic men by more than 2 pounds?
A processor of carrots cuts green top off each carrot, washes the carrots, and inserts six to a package. Twenty packages are inserted in a box for shipment. To test weight of the boxes, a few were checked.
In the Distance problems, the kids are given a Rate (speed) that a vehicle is going, as well as a Time that the vehicle travels, and asked to calculate the Distance travelled. In the Rate problems they are asked to compute Rate from the other two ..
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