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About 90% of patients suffering from serious heart attack die within 5 years. In an attempt to reduce the death rate from heart attack, Green Hospital is creating a new form of treatment. Recently, they conducted a study with 150 patients, and, among them, 128 died within 5 years. Type I error is 5%. Use the p-value approach to say whether there are sufficient evidences to conclude that death rate due to serious heart attack has been reduced [Setup null/alternate hypotheses. Indicate what your p-value is along with your test statistics. Decide whether to reject null hypothesis and draw conclusion]
In a poll of 2,003 adults within the United States for the Wall Street Journal, 57% of adults said that public education needs to be improved. Construct a 95% confidence interval for the proportion of all U. S. adults who hold this opinion.
Are there any high leverage points or extraordinarily influential points? Briefly justify your answer. I. The Variance inflation factors are below. Are there any problems of multicollinearity?
Multiple choice questions based on regression - dependent variable Y and an independent variable X is provided.
In the course of her analysis, she selected a random sample of 20 weeks and recorded the sales for each week and the amount spent on advertising.
Determine the probability that gas tank's capacity is above 15.25 gallons?
A researcher is exploring the effects of strenuous physical exercise on the onset of puberty in girls. The age of menarche is determined for six young athletes
Two names are drawn out of the 100 employees at the firm. How many different ways could these days off be awarded?
Albert Einstein stated, "The formulation of a problem is far more often essential than its solution, which may be merely a matter of mathematical or experimental skill.
a genetic test is used to determine if people have a predisposition for thrombosis which is the formation of a blood
After an introductory statistics course, 80% of students can successfully construct box plots. Of those who can construct box plots, 86% passed
The reaction time to a certain psychological experiment is considered to be normally distributed with a mean of 20 seconds and a standard deviation of 4 seconds
One of the accompanying figures represents the p-value after getting 16 heads out of 30 flips, and the other represents the p-value after getting 18 heads.
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