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Suppose X and Y are independent random variables with X ∼ Gamma(α, λ1) and Y ∼ Gamma(α, λ2). Is X + Y a gamma random variable? If so, what are the parameters of the distribution?
Calculation of the Probability of Increase in Income and Wealth and Increase in Happiness
Choose an article that explains research using one or more statistical tests (z, t, ANOVA, chi square, regression) as part of data analysis. Explain the study using the following information:
In a certain class, midterm score averages out 70 with an SD of 15, as do scores on the final. The correlation between midterm scores and final scores is about 0.40. The scatter diagram is football-shaped.
An experiment was carried out to assess the impact of the variables x1 = force(gm), X2 = power (mW), x3 = temperature (C) and x4 = time (msec) on y = ball bond shear strength (gm). The results are given in the problem 5 Excel data file.
What method of random selection can be used to determine which women to select in quantitative research?
Show that this is the distribution of the number of failures before the first success in Bernoulli (p) trials.
Suppose that the probability of strong demand is 0.8 and the probability of weak demand is 0.2. What is the optimal decision using the expected value approach?
the number of items rejected daily by a manufacturer because of defects was recorded for the past 30 days. the results
Consult the corporate data shown below. Plot data; find µ, σ, σ2; and identify outliers.
in a normal distribution what z-score value separates the highest 40 of the scores from the rest of the
A person can choose any of five houses, each of which has four upstairs bedrooms. In one of the houses, three bedrooms are empty and one contains an antique.
A company requires its secretarial employees to demonstrate his/her ability to type more than 45 words per minute in a typing test.
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