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What is the t-value associated with 25 degrees of freedom and 20% in the tail? (please round your answer to 3 decimal places)
what is the probability that on 10 true of false questions 4 will be correct and 6 incorrect out of plain
Suppose that the mean vector and the covariance matrix of the three dimensional normal random vector X are
The estimate of β2 in the model was 19, with a standard error of 3. Use this information to form a 95% confidence interval for β2. Interpret the interval.
Ninety-eight heterosexual couples, at least one of whom was HIV- infected, were enrolled in an HIV transmission study and interviewed about sexual behavior.A summary of condom use reported by heterosexual partners. How strongly do the couples agre..
ph in the water is 7 at the .05 significance level. Her alternative hypothesis is that the water does not have a pH of 7. For which p-value will she fail to reject the null hypothesis?
dr. cardenas studied political attitudes among di erent groups of 20- 40- and 60- year-olds. political attitudes were
Are there circumstances in which a pie chart cannot be drawn, but a bar graph could be drawn? What are these circumstances?
suppose we roll one die repeatedly and let ni be the number of the roll on which i first appears. find the joint
What is the probability that a randomly selected score will be between 60 and 70?
What is the probability that a randomly chosen employee is an Administrator if the employee has the opportunity of gaining promotion next year?
A friend, who knows that you are almost finished with this book, comes to you for advice on a statistical analysis.
For each of the following situations, would you prefer your value to be average, a low outlier, or a high outlier? Explain.
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