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In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities.
Ocean fishing for billfish is very popular in the Cozumel region of Mexico. In the Cozumel region about 48% of strikes (while trolling) resulted in a catch. Suppose that on a given day a fleet of fishing boats got a total of 25 strikes. Find the following probabilities. (Round your answers to four decimal places.)
(a) 12 or fewer fish were caught
(b) 5 or more fish were caught
(c) between 5 and 12 fish were caught
The information is reported below. Is it reasonable to conclude the percent is less now than five years ago?
Using the same bead color, repeat the procedure of step 1 for samples of size- 20, 40, 80, 100- Make sure you record five sample proportions for each sample size; give the results to your instructor.
a club with 20 members must choose a three-person executive committee and a five-person social committee.a how many
Use the four methods presented in this section to determine whether there is any evidence to suggest the data are from a non-normal population.
A student wanted to construct a 95% confidence interval for the average age of students in her statistics class. She randomly selected 9 students. Their average age was 19.1 years with a standard deviation of 1.5 years. What is the best point esti..
From an executive's position, identify and explain at least three challenges and opportunities that might face an international executive over the next five
The critical value of F at 95% confidence when there is a sample size of 21 for the sample with the smaller variance, and there is a sample size of 9 for the sample with the larger sample variance is:
If the company's report is correct, what is the probability that the average balance of an account in the sample is $394 or less?
Use the above information to calculate the number of watches (units) and the sales dollars we need in order for our flea market business to break even for the day.
Bill, Mary, and Tom have coins with respective proximities p1, p2, p3 of turning up heads. They toss their coins independently at the same times.
In a large section of statistics class, the points for the final exams are normally distributed with a mean of 72 and a standard deviation of 9. Grades are to be assigned according to the following rule.
What is the expected number of hands a player is dealt before the first hand better than one pair appears? Explain how you would use simulation to answer.
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