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Question: Guessing on Tests
a. On a true/false quiz in which you are guessing, what is the probability of guessing correctly on one question?
b. What is the probability that a guess on one true/false question will be incorrect?
The intervals make clear how uncertain we are about the true value of p and how little difference there is between the two sample outcomes.
We wish to create this mean value interval for selling price with 95% confidence level. Find out the best point estimate (average) for selling price. Critical t-value(s) associated with 95% confidence level.
70% of the girls surveyed had used an online social network, compared to 54% of the boys. What does it mean to say that the difference in proportions is significant?
A newspaper reports have 58 percent of farmers are planning to plant genetically modified crops presesnt year. The article adds that the poll is based on a random sample.
women have pulse rates that are normally distributed with a mean of 77.5 beats per minute and a standard deviation of
a small stock brokerage firm wants to determine the average daily sales in dollars of stocks to their clients.a sample
In a survey of 900 adults, 240 said that they watched the World Cup final on television. Using these sample statistics, calculate the margin of error, E, for a 90% confidence interval for the proportion of all adults that watched the World Cup final ..
ABC Corporation has been using statistical process control for several months.
Suppose that we survey 20 individuals working for a large company and ask each whether they favor implementation of a new policy regarding retirement funding. If, in our sample, 6 favored the new policy, find an estimate for p, the true but unkno..
you are the vp for the cardiovascular service line at a hospital. a nurse manager on the step-down-unit tells you about
questiona. the following probability distributions relate to the completion times in weeks ta and tb of two independent
a car manufacturer claims that the miles per gallon for a certain model has a mean equal to 40.5 miles with a standard
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