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A binomial experiment, which has the probability of success for one trial p = 0.63, is being observed, and 70 trials are preformed. Binomial probabilities for various outcomes can be computed. Howev
Suppose the random variable X has mean 45 and standard deviation of 15 and the random variable Y has mean 15 and standard deviation 3. What would be the mean and standard deviation of the random var
A trucking company wants to estimate the weight load capacity of a particular brand of their flatbed trucks. In measuring 13 of their trucks the average load capacity was 2646 pounds, with a sample
The 99% confidence interval for the true mean difference between the two means is (2 mpg, 5 mpg). Which of the following statements is the best interpretation of this confidence interval?
Alex computed the p-value of the test statistic while Mike compared the test statistic to the corresponding critical value from the t-Table of Critical Values.
In a physics class Alex and Mike were performing a hypothesis test concerning the mean amount of static electricity in a capacitor. Both students computed the same test statistic but Alex's result w
For a particular card game a standard deck of cards has all of the aces, kings, queens, and jacks removed. Among the 36 cards remaining two cards are chosen simultaneously at random. What is the pro
Michael's teacher informed him that his score of 98 on the last Algebra test corresponded to a z-score of -2.12. Which of the following is the best interpretation of Michael's result?
A Los Vegas slot machine requires 25 cents to play. It gives payouts, per play, based on the following probabilities:
If Jack's job consists of preparing six par 3 greens and four par 5 greens, what is the probability that he will have at least 9 of them cut in the allotted time?
Suppose that a test for Hepatitis C is 98% accurate in that if a person has Hepatitis C, the test will indicate "positive" with 0.98 probability, and if a person does not have Hepatitis C, the test
Assuming that the two groups would have unequal variances, what would be the t-statistic be for the test with the null hypothesis that the means are equal, tested against the alternative hypothesis
Ten percent of the tickets are labeled 25%, 20% are labeled 15%, and the remaining are labeled 5%. Excluding sales tax, what is the expected actual sale for a customer wishing to purchase $200 worth
A program submitted for an assignment has a probability of 0.2 of going into an in nite loop. If it does not go into an in nite loop then its execution time is an exponential random variable X with
If you know that 48% of children born are male, what is the probability of having 2 girls and one boy in a family of 3 children. Order is unimportant, (but you want to use binomial distributions or
Thirty percent of diabetic patients admitted to a hospital have kidney problems. A sample of 10 hospital admissions of diabetics is drawn. The value x the number of people having kidney problems is
A clinical trial is conducted to compare an experimental medication to placebo to reduce the symptoms of asthma. Two hundred participants are enrolled in the study and randomized to receive either t
Among coffee drinkers, men drink of 3.2 cups per day with a standard deviation of 0.8 cups. Assume the number of coffee drinks per day follows a normal distribution.If a sample of 20 men is selected
The genes for eye color in a certain male fruit fly are (R,W). The genes for eye color in the mating female fruit fly are (R,W). Their offspring receive one gene for eye color from each parent.
A researcher collects data on two independent samples. The first group consists of 20 human subjects, has a sample mean of 4, and a variance of 5. The second group consists of 10 subjects, has a sam
A consignment contains 100 items. If a random sample of 3 items from a consignment contains 1 or more faulty items then the consignment will be rejected.
A survey of 144 retail stores revealed that the average price of a microwave was $375 with a standard error of $20 If 95% and 98% confidence intervals were developed to estimate the true cost of the
Resistors produced by a certain firm are marketed as 10-ohm resistors. However, the actual resistances of the resistors may vary. It is observed that 5% of the values are below 9.5 ohms and 10% are
U.S. Department of agriculture date reveal small farms in the USA number one million owners. Small farm data show acreage farmed per owner is normally distributed with a mean of 20 acres and a stan
A clinical trial tests a method designed to increase theprobability of conceiving a girl. In the study 516 babies wereborn, and 258 of them were girls. Use the sample data to construct a 99% confid