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Assume five samples of yarn are chosen randomly. Determine the probability that at least one of them has a breaking strength of at least 100?
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 machine?
Determine the probability that in the upcoming five-day work week, he will wear white shirt on Monday, then the light blue shirt on Tuesday, then the green shirt on Wednesday, then black shirt on Th
Assume that four coins are flipped, and we are told that at least one of them came up heads. Determine the probability that at least three coins came up heads?
Find the deflated savings for these years and comment on the result.
The probability of getting an 8 when you roll 2 dice is 5/36 = 0.139. Explain in a few sentences, using as precise language as possible, what this number actually means. (Don't just use synonyms for
Assume T is the time between phone calls at computer tech help center. They average 3.7 phone calls per minute. (You don't know the exact distributions, so employ the one(s) that are most appropriat
Additionally, in sample of 225 students attending private four-year universities, only 20 students work at least 20 hours per week. Determine the test value for a test of the difference between thes
Compute a Paasche index. Develop a weighted aggregate quantity index using 2000 as the base year and price as the weight.
A multiple choice test has 15 questions, and each and every question has six answers to pick from. If student answers every question randomly, what would be the probability that she gets exactly two
A car salesman claims that the variance of prices on convertibles is higher than the variance of prices on station wagons. The standard deviation of the list price on 16 convertibles is $6800 and th
A researcher hypothesized that variation in car rental rates (in US$/day) at the major city airport is less than in the car rental rates down town. A survey found that variance of rental rates on 8
For the samples summarized below, test the hypothesis that two variances are equal, at ? = 0.05
Last semester I was having class of 36 students in STAT 319 course, of which 27 students filled-in their course as well as instructor evaluation report.
Carter Motor Company claims that its new sedan, the Libra, will average better than 30 miles per gallon in the city. Determine the type I error for the test.
A sociaologist develops test to determine attitudes regarding public transport. 27 randomly chosen subjects are given the test. Their mean score is 76.2 and their standard deviation is 21.4. Develop
A survey revealed amount of pocket money held by each student in sample of students from statistics 205. The amounts (in dollars) are 5.50, 10.20, 3.15, 6.08, 4.85, 4.80, 4.70, 8.52, 7.90, 6.10, 3.5
A college statistics professor has office hours from 9am to 10:30am daily. A sample of waiting time to see professor(in minutes) is 10,12 20, 15, 17, 10, 30, 28,35, 28, 19, 27, 25, 22, 33, 37, 14, 2
Scores on aptitude test are distributed with mean of 220 and standard deviation of 30. The shape of distribution is unspecified. Determine the probability that the sampling error made in determining
Determine the null and the alternative hypotheses. Describe the contingency table of the expected frequencies. Calculate the test statistic.
The null hypothesis is to be tested at 95% confidence. Find out the critical value for this test. What do you conclude? Find out the p-value and perform the test.
In a random sample of 500 people aged 20-24% , 22% were smokers. In a random sample of 450 people aged 25-29, 14% were smokers. Construct a 95% confidence interval for the difference between the pop
A medical journal reported the following frequencies of deaths due to cardiac arrest for each day of the week:
Describe the null and alternative hypotheses to be tested. Calculate the expected frequencies. Calculate the test statistic.
Claim U=111 sample data: n=10, xbar=101, s=15.3. The sample data appear to come from the normally distributed population with unknown mean as well as standard deviation.