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Question - Average hours per week on the Internet. The Student Monitor also reported that the average amount of time spent per week on the Internet was 19.0 hours. You suspect that this amount is far too small for your campus and plan to add this question to your survey.
(a) You feel that a reasonable estimate of the standard deviation is 6.5 hours. What sample size is needed so that the margin of error of your estimate is not larger than 1 hour for 95% confidence?
(b) The distribution of times is likely to be heavily skewed to the right. Do you think that this skewness will invalidate the use of the t confidence interval in this case? Explain your answer.
Assuming that the process of answering the questions on a five-question quiz is an independent trials process and that a student has a probability of .8.
a gambler has a fair coin with one head and one tail and a two-headed coin. he selects one of the coins at random and
Construct a 90% confidence interval for the population proportion, p, in order to test the claim from a confidence interval point of view. What is the best point estimate for p?
As part of his review for a chemistry test, a student randomly selects (without replacement) 40 out of 102 elements listed on the standard tables, and tries to guess their atomic numbers.
question 1 the annual precipitation amounts in a certain mountain range are normally distributed with a mean of 88
Sample size of only 20. Find out a 95% confidence level for population Cp.
find an online report of a simple research study that includes statistics. you must include website link to the report
You have ordered 10 bags of cement, which are supposed to weigh 94 kg each. The average weight of the 10 bags is 93.5 kg. Calculate the condence interval in R, and write the code you used
a) T- shirts at a store: price each, number sold. b) Real estate: house price, house size (square footage). c) Economics: Interest rates, number of mortgage applications. d) Employees: Salary, years of experience.
Notice that we cannot tell whether the metacircular evaluator evaluates operands from left to right or from right to left. Its evaluation order is inherited from the underlying Lisp: If the arguments to cons in list-of-values are evaluated from le..
A small company that manufactures computers computer received 10 shipments of the chips in lots of 20 chips from the manufacturer. what is the probability that there will be 2 shipments with at least one defective chip?
Population growth. Here is a "back-to-back" stemand-leaf display that shows two data sets at once - one going to the left, one to the right.
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