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A random sample of 30 households was chosen from the particular neighborhood. The number of cars for each household is shown below. Determine the mean number of cars per household for population of
Determine the "average" age of your data? Is there any outlier? If yes, bring it to the class. Calculate 95% CI and find E. interpreted your answer.
They take the simple random sample of 100 people, and find out that on the average people in sample carry $0.73 in change. They figure out the standard error is $0.04, because ?100 x ?(.73 x .27) =
The length of time needed to complete the college achievement test is found to be basically distributed with the mean 60 minutes and variance 144 minutes.
Assume a test subject will lie 10% of the time. Determine the probability that the random statement by the subject will be flagged as a lie by machine? If another subject creates a statement that th
the certain kind of yarn produced by the vendor has normal distribution with mean 95 and standard deviation 11. Determine the probability that a random sample of yarn has a breaking strength that is
If 100 customers visit counter in 3-day period, what's the probability that at least 20 of them need to wait more than fifteen minutes?
Of the ten questions, five involve the Civil War, which is your least favorite subject. Determine the probability that at least two Civil War questions will be on the exam?
Determine the probability that Kevin makes two or fewer of his shots? Determine the probability that both of them make two or fewer of their shots each?
The following data represent the scores of a sample of 50 randomly chosen students on a standardized test.
At the 5% significance level, do data give sufficient evidence to conclude that at this specific company the mean salary of female employees is less than the mean salary of male employees? Employ th
Compute Mean Squares and the F-ratio Compute Mean Squares and the F-ratio
Paul and Jen make their free throws 25% of the time. They each take 10 shots. Determine the probability that Kevin makes two or fewer of his shots?
Four of them, randomly selected, will be on the exam. Of the ten questions, 5 involve the Civil War, which is your least favorite subject. Determine the probability that at least two Civil War quest
Assume a test subject will lie 10% of the time. Determine the probability that the random statement by subject will be flagged as a lie by the machine? If another subject makes a statement that mach
If a phone call just occurred, determine the probability that there won't be another phone call for at least the next 30 seconds? Determine the probability that there will be at least 2 phone calls
25 patients were given new drug and the mean side eect factor is found to be .73. Then, test the appropriate null hypothesis and also ne the Type I error and Type II error.
Day Shift and Night Shift. Let the average number of defected items in the Day Shift is 20 out of 2000 items and that in the Night Shift is 15 out of 1300 items.
Obtain a precise criterion for the deciding whether to reject the null hypothesis in favor of alternative hypothesis. Apply the criterion in part (d) to sample data and state your conclusion.
Supposing that the heights of 3-year old elm trees are normally distributed find a 95% confidence interval for the mean height of 3-year old elm trees.
When people apply for credit, their credit is rated using scores. The random sample of 20 appplicants for each car loan has mean score of 660.3 and standard deviation of 95.90. Develop a 90% confide
A random sample of 100 houses show that spent $370 on gifts alt year with a standard deviation of $105. Find 90% confidence interval for mean of gifts in houses.
Poll is 81% of adults say policies require reform. Agency cheks 81% of view on it. Random sample of 500 adults want this out of 425 of them. Test 5% signficance level if curret percentage of adults
A corporate board contains 12 members. The board decides to make a five-person Committee to Hide Corporation Debt. Assume four members of the board are accountants. Determine the probability that th
Which of the following accurately states the chi-square test for independence? It is similar to correlation because it uses one sample to evaluate the relationship between two variables.