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Purchased Mailing E-Mail TotalYes 26 11 37No 227 247 474Total 253 258 511
At 0.05 level significance, is there evidence of the difference in proportion of dvds purchased on basis of the kind of media used (Mailing, E-Mail)?
A sample of patients for one busy primary care practice is used as the comparison group. What is the research design and its variables?
There is a statistical deception here. Explain what is deceptive about the bar graph.
At the .01 significance level can we conclude the mean age is more than 8.4 years for the cars of university students? Compute the value of the test statistic.
What is the difference between strong negative and strong positive correlation? What does zero correlation tell you? Can you share a relationship between two variables that is typically negative?
A quality control engineer wanted to estimate the mean weight (in grams) of M&M candies being produced on a certain machine in the factory. After collecting an appropriate random sample of M&M candies, he obtained the following weights:
Determine the critical path and project completion time.
A pair of dice is tossed once. Let X denote the sum of the face values, and let Y denote the absolute value of the difference between the face values.
Based on this information, determinethe probability that specific fare will exceed $15.00?
What is the likelihood all four of the selected flights arrived within 15 minutes of the scheduled time?
It is estimated that 3% of the athletes competing in a large tournament are users of an illegal drug to enhance performance. The test for this drug is 90% accurate.
The Kruskal-Wallis rank test is a nonparametric replacement - The Wilcoxon rank sum test tests a null hypothesis
Multiple choices based on regression analysis - how much or how many but instead is assigned values to represent categories
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