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It is found that when a particular 4-sided die is rolled a 1 occurs 25.8% of the time, a 2 occurs 24.6% of the time , a 3 occurs 25.9% of the time, and a 4 occurs 23.7% of the time. a) If the die is rolled 25 times, what is the probability that an odd number occurs exactly 14 times? b) What is the expected value of a single roll of the die?
To avoid the problem of not having access to Tables of F distribution with values given for the lower tail, the numerator of the test statistic should be the one with:
Joe thinks that no more than 20% of students in his Statistics class will get an A in the final examination. To prove his claim, he takes a random sample of 35 students and finds to his surprise that 30% of students got an A.
The Speedy Oil Change Company advertised a 15-minute wait for an oil change. A sample of 23 oil changes showed a mean time of 16.5 minutes and a standard deviation of 4.3 minutes.
the amount spent worldwide in advertising on mobile devices can be estimated by fx 0.4x2 0.01x 0.9 where x is the
Use the five-step p-value approach to hypothesis testing and a 0.05 level of significance to determine whether the proportion of full-time students at Miami University is different from the national norm of 0.46.
determine if the following data set is a population or a sample the average electric bill for the 50 united states and
Construct a 99% confidence interval estimate of the population proportion of accounts that would purchase the additional line if the handset were free.
A sample mean, sample size, and population standard deviation are given. Use the P-value approach to perform a one-mean z-test about the mean of the population from which the sample was drawn.
Assume a steady smoker spends on average $20 with a standard deviation of $5 per week on cigarettes. What is the probability that a sample of 100 steady smokers spend between $19.50 and $21?
What are the strengths and weaknesses of nonparametric tests? Can the outcomes of the nonparametric tests be generalized to populations?
Here is my data: these are the wages for women with a 2 yr degree, $11,702, $24,509, $34,746, $35,185 (median of $29,627) These are the wages for women with a 4 yr.
hypothesis test for the difference between two means.grand strand family medical center is specifically set up to treat
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