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Average diameter of sand dollars on the certain island is 4.00 centimeters with standard deviation of 1.00 centimeters. If 36 sand dollars are selected at random for collection, determine the probability that average diameter of those sand dollars is more than 3.80 centimeters. Suppose that variable is normally distributed.
options:A) 0.615B) 0.820C) 0.385D) 0.885
Generate three random observations from the uniform distribution between -10 and 40 by using the following random numbers: 0.0965,0.5692,0.6658
In a random sample of 26 people, the mean number of books they had read in the past year was 14.93 books and the standard deviation was 16.60 books.
To compute all the descriptive statistics for the following set of three test scores over the course of a semester. Which test had the highest average score? Which test had the smallest amount of variability?
Finding the probability value for the given data using normal approximation
A production process is known to produce a particular item in such a way that 5 percent of these are defective. If two items are randomly selected as they come off the production line
To find out whether living next to high-voltage power lines increases your chance of getting cancer, researchers selected various homes at random.
Suppose we have a population of scores with a mean = 200 and a standard deviation = 10. Assume that the distribution is normal. Provide answers to the following questions:
What is the best estimate of the average tread life for the entire population of these tires?
At the .01 level of significance, is the true mean greater than 10?
What is the likelihood all four of the selected flights arrived within 15 minutes of the scheduled time?
Assuming that a hypothesis test of the claim has been conducted and that the conclusion is failure to reject the null hypothesis, state the conclusion in nontechnical terms.
Confirm that these statements are accurate by finding the geometric mean rate of increase.
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