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Probability values using binomial distribution. Calculate each binomial probability:
(a) Fewer than 7 successes in 15 trials with a 40 percent chance of success. (Round the answer to 4 decimal places.)
(b) At least 6 successes in 10 trials with a 70 percent chance of success. (Round the answer to 4 decimal places.)
(c) At most 12 successes in 17 trials with a 90 percent chance of success. (Round the answer to 4 decimal places.)
(d) More than 13 successes in 19 trials with a 40 percent chance of success. (Round the answer to 4 decimal places.)
At least half the patients are under 15 years old? First, describe how this can be modelled as a binomial distribution with 8 trials, where success is visitor age is under 15 years old and the probability of success is 20 percent.
Can you conclude that the information in the article is untrue? Use the 0.05 significance level. Determine the p-value and explain its meaning.
Determine the event that the sum of the numbers falling uppermost is less than or equal to 7
Let X be the number of yes votes obtained from a random sample of 200 out of the entire voting population. What is the expected value of X if, in fact, 65% of all voters supported the dictator?
What is the standard deviation of expected returns for Stock X? For Stock Y?
A scientist examined the effect of temperature and catalyst on the yield of a reaction. He ran the experiment at both 150° and 200°C with two types of catalyst.
Determine the likelihood of accepting a lot which is 1% defective?
How large a sample should be taken if the desired margin of error E is:
Use the t test to determine whether the slope of the regression model is significant at α = 0.05.
Could mud-wrestling be the cause of a rash contracted by University of Washington students in the spring of 1992? Two physicians at the University of Washington health center wondered this when one male and six female students complained of rashes..
In addition, record the values for the UCL, center line, and LCL. Also, record any points that are out of control. Use a z-value of three.
A bag contains 5 blue balls and 8 purple balls. If 3 balls are chosen randomly and without replacement, form the bag. Let x be the number of blue balls obtained. Then x has a distribution.
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