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For a psychology experiment, Emma is assigned the task of finding the average number of hours U.S. college students sleep each night. Her results must be at the 95% level of confidence with a maximum margin of error of 0.5 hours. Assuming the standard deviation is 1.2 hours (based on a previous, reliable study), how many students must Emma survey?
q1.a man has blood type b. the mans mother was type ab and his father was type a. if his wife has blood type o and is
During a 36 year period, lightening killed 2768 people in the US. Assume that this rate holds true today and is constant throughout the year. Find the probability that tomorrow.
A 95% confidence interval is not so much a statement about any particular interval, such as (79.3, 80.7), but pertains to what would happen if a very large number of like intervals were to be constructed. How are confidence intervals calculated
When Boxley receives an award from the arbitrator that entitles it to significant damages from Eberly, the latter appeals the arbitrator's decision on the ground that the excluded evidence would have changed the outcome. Why is Eberly likely or un..
A simple random sample of n = 20 plots are selected for an aerial survey and the following numbers of moose are detected: 0, 0, 0, 0, 1, 2, 6, 11, 5, 1, 9, 3, 1, 0, 10, 4, 7, 22, 0, 0.
Give a 99% con?dence interval for the proportion of people in the given age group who may be successfully treated with the facial cream.
A company makes water pumps. The probability that a randomly selected pump is defective is equal to p. What is the probability that a sample of M pumps will contain exactly 3 defective items? Use Binomial distribution and Poisson distribution. Com..
The rate of service calls per month was researched yielding the following results (no of service calls divided by the number of equipment): Do these data indicate that the program is effective?
the weights of men are normally distributed with mean of 173 lb and a sd of 30 lb. suppose we choose a random sample of
Let X bar be the average of n such independent measurements. Use Chebychev's inequality to estimate how large n should be such that P(|X bar - M |
and: The expressions are evaluated from left to right. If any expression evaluates to false, false is returned; any remaining expressions are not evaluated. If all the expressions evaluate to true values, the value of the last expression is return..
one of the requirements of linear regression is homoscedasticity of the residuals. this means that .select onea. the
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