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Suppose it is known that 10% of people who play poker machines have a gambling problem. Suppose it is also known that 20% of the population play poker machines and 5% of the population have a gambling problem. If a member of the population is chosen at random, what is the probability that he or she will be a problem gambler who does not play poker machines (rounded to 3 decimal places)?
Find the mean and standard deviation of X, the number of students in class, who will develop influenza.
Based on data from a car bumper sticker study, when a car is randomly selected, the number of bumber stickers and corresponding probabilities are shown below.
During recent seasons, Major League Baseball has been criticized for the length of the games. A report indicated that the average game lasts 3 hours and 30 minutes.
Using data on average school grade for first use. Use the t test to conduct a one-tailed test of the null hypothesis, assuming that the average grade is higher for males than for females
Formulate an appropriate hypothesis test to examine at the 10% level of significance whether the manager's worries are justified.
Supposing that both populations are normally distributed, construct a 99% confidence interval for the ratio of the two population variances.
Forecast quarterly demand where x = 0 in second quarter of last year. Quarterly seasonal factors are Q1=1.5, Q2=0.8, Q3=1.1, Q4=0.6. Determine the forecast for last quarter?
Marentette and El-Masri (2011) used logistic regression to identify predictors of obtaining seasonal influenza vaccination among hospital-based nurses in Canada. Their results are shown in table 1:
Let X be a random variable with probability density distribution given by. Find the probability density function of Y=10X - 4.
Test the claim of the brewery about the mean volume equal to 32 oz. at the 0.05 significance level. It's your choice whether to use z or t.
only 3 reported that their health was excellent. Find the probability that when 13 adults are randomly selected, 3 or fewer are in excellent health.
The assembly time for a product is uniformly distributed between 6 to 10 minutes. The probability of assembling the product between 7 to 9 minutes is
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