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The time spent studying by students in the week before final exams follows a normal distribution with a standard deviation of 8 hours. A random sample of 4 students was taken in order to estimate the mean study time for the population of all students. What is the probability that the sample mean differs from the population mean by less than 2 hours?
Determine the p-value of the test that a family's income and region are independent.
Which sample mean will probably yield a more accurate estimate of its population mean? Why?
convert the following sat scores into new distributions with a mean of 50 and a standard deviation of 2.what new score
a study indicates that in ca 36 of people ages 17 to 26 have at least one tattoo.you randomly sample 30 people in that
Describe the number of patients served at the three locations each day. What are the maximum and minimum numbers of patients served at each of the locations?
Determine the mean and the standard deviation of x.- For the sample size n = 2, determine the mean for each possible simple random sample from this population.
Consider strings of length 9 with elements being a, b or c. How many strings will contain at least 6 b a?
for problems 1-5 standardize the value according to the given average and sd. 1. x 10 average 5 and sd 2. 2. x 73
A sample of 148 of our statistics students rated their level of admiration for Hilary Rodham Clinton on a scale of 1 to 7. The mean rating was 4.06 and the standard deviation was 1.70.
At the University of Wisconsin - Stevens Point, an advertising campaign was aimed at new freshmen encouraging them to increase their level of physical activity - An advertising campaign was aimed at new freshmen encouraging them to increase their l..
What about these descriptive statistics makes you wary or uncomfortable? In other words, if you were a real estate agent, would you go around spouting the answers that you gave above? Explain.
What are the differences between fixed and variable costs and among total, average, and marginal costs?
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