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The government conducts a study of the spatial perception among commercial aircrafts pilots. A new test of commercial perceptions is developed, and we want to estimate the mean score for all pilots. How many randomly selected pilots must be tested if we want the sample mean to be in error by no more than 3 points, with a 98% confidence? A preliminary study suggests that the population standard deviation is 24 points.
randomly pick up 5 cards from a deck of 52 cards. find the probability that the third card is red if the first card is
If the survey consisted of a random sample of 40 executives, give a 95% confidence interval for the proportion of executives less willing to sacrifice their family lifestyle.
The weight lost or gained is listed with a positive sign for those who continued to lose weight and a negative sign for those who gained some back.
question mimi was the 5th seed in 2012 umuc tennis open that took place in august. in this tournament she won 83 of
An economist is deriving a model to predict outcomes on the stock market. He creates a list of expected points on the stock market index for the next two weeks.
Algae-fixed organic matter will be produced in a clear-water sample with zero chemical oxygen demand (COD) and biochemical oxygen demand
altitude and temperature listed below are altitudes thousands of feet and outside air temperatures degrees fahrenheit
a manufacturer of mp3 players surveyed 100 retail stores in each of the firms sales regions. an analyst noticed that in
State the equation of the regression line used to predict values of the criterion variable. Distinguish between the predictor variable and criterion variable.
Find the optimal solution to the linear program per relaxation (in other words, assume all variables can take on any numerical value). Report the values of each variable and the optimal objective value.
Suppose that you wished to conduct a similar survey for the geographic region you live in. Describe the population for your survey.
a) If the result of the flip is heads, what is the probability that the coin is two headed?
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