Computing the value of the test statistic
You wish to test the claim that u > 11 at a level of significance of ? = 0.05 and are given sample statistics n = 50, sample mean = 11.3 and standard deviation = 1.2 Compute the value of the test statistic. Round your answer to two decimal places
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In a large lecture class, the professor announced that the scores on a recent exam were normally distributed with a range from 51 to 87. Using the Empirical Rule ? ± 3? to estimate ?, how many students would you need to sample to estimate t
In constructing a confidence interval for a mean with unknown variance with a sample of 25 items, Bob used z instead of t. "Well, at least my interval will be wider than necessary, so it was a conservative error," said he. Is Bob's statement corre
The probability of concluding that the true mean is less than 59 psi when in fact it is equal to 59 psi is only .05. The probability of concluding that the true mean is less than 59 psi when in fact it is equal to 59 psi is only .05.
The discrete random variable X is the number of students that show up for Professor Smith's office hours on Monday afternoons. The table below shows the probability distribution for X. What is the probability that at least 1 student comes to offic
You wish to test the claim that u > 11 at a level of significance of ? = 0.05 and are given sample statistics n = 50, sample mean = 11.3 and standard deviation = 1.2 Compute the value of the test statistic. Round your answer to two decimal pla
When testing H0:u > u0, using confidence intervals, if u is not contained in the confidence interval then we would A. Draw no conclusion B. Reject H0 C. Alter the level of confidence to allow u to be in the confidence interval D. Fail to reject
A pet supplier has a stock at parakeets of which 10% are blue parakeets. A pet store orders 3 parakeets from this supplies. If the supplier select the parakeets at random, whats the chance that the pet store gets exactly are blue parakeets?
A random variable is normally distributed with a mean of 25 and a standard deviation of 5. If an observation is randomly selected from the distribution, determine two values of which the smallest has 25% of the values below it and the largest has
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