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a) What is the expected value of the sample mean weight? Give an exact answer.
b) What is the standard deviation of the sample mean weight? Give your answer to four decimal places.
c) What is the approximate probability the sample mean weight will be less than 25? Give your answer to four decimal places. Use the standard deviation as you entered it above to answer this question.
d) What is the value c such that the approximate probability the sample mean will be less than c is 0.98? Give your answer to four decimal places. Use the standard deviation as you entered it above to answer this question.
a small town has a population of 20000 people. among these 2000 regularly visit a popular local bar. a sample of 225
an entomologist writes an article in a scientific journal which claims that fewer than 20 in ten thousand male
A sample of n=20 has a mean of M = 40. If the standard deviation is s=5, would a score of X= 55 be considered an extreme value? Why or why not?
a particular telephone number is used to receive both voice calls and fax messages. suppose that 25 of the incoming
Develop a correlation matrix. Which independent variable has the strongest correlation with the dependent variable? Does it appear there will be any problems with multicollinearity?
The average value observed was 1.2 mg. If the sample variance is 0.04 mg, compute a 99% confidence interval for the mean nicotine content.
What is the probability you will have 20 or less flights that are late? What is the probability you will have more than 100 on time?
The times for 300 college students of introductory statistics to complete a one-hour times exam.
A standard deviation of 7.3 years. What is the 95% confidence interval estimate for the average number of years served by all Supreme Court justices?
For full marks use the coded method and round your answer to 1 decimal place.Find the slope for the trend-line.What is the intercept of the trend-line.
Which of these variables are discrete and which are continuous random variables?
The statistical assumptions required to perform a one-way ANOVA to compare the means of these three groups are reasonable based on the data. A partially completed ANOVA table is provided below?
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