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Dr. Zak also gave his students the Beck Depression Inventory (BDI). The correlation between his test and the BDI was r =.67. Evaluate this correlation. What does this correlation tell us about the relationship between these two instruments?
Large university health system, 55 of 120 randomly selected physicians were women. Find the critical values to two decimal places if alpha=0.05.
People arrive at a restaurant at a rate of five per minute and wait to receive their order for an average of 5 mins. Customers eat in with a probability of 0.5 and carry out with a probability of 0.5.
Determine the range, variance, and standard deviation for the sample data.
This set of height measurements are recorded in centimeters. Answer the following questions using the Histogram Applet. Is 1.7cm a Plausible mean value? Explain.
Generate the statistical null and alternative hypotheses. Describe what information the effect size would tell you that the probability value would not tell you.
Is it sensible to conclude that this set of n=16 people is not representative random sample of registered voters?
Given the following revenue and cost function for a business firm, calculate the break-even quantity, total revenue, total cost and total profit at break-even level of production.
BMI in children is roughtl normally distributed with the mean of 24.5 and standard deviation of 6.2. BMI of 30 or more is considered obese. Determine proportion of children are obese?
How would your colleagues probably react to such a statement of yours? Is their expected (positive or negative) reaction the local cultural habit in your company or is it a wider position common for people in your country?
The actual weight of soap powder in a box has a normal distribution with a mean of 33 oz. and a standard deviation of 0.8 oz. What proportion of packets are underweight.
If the residual plot, i.e., a graph in which the residuals for a particular regression model are plotted along with their associate value of x as an ordered pair, shows a parabolic pattern, which of the following assumptions of the simple regressi..
Use Chebyshev's theorem to find what percent of the values will fall between 120 and 150 for a data set with mean of 135 and standard deviation of 7.5.
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