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A grab bag contains 10 $1 prizes, 7 $5 prizes, and 3 $20 prizes. three are chosen at random. find the probability that exactly two $20 prizes are chosen?
Scores on an endurance test for cardiac patients are normally distributed with mean = 182 and standard deviation = 24.
This indicates that about 80 out of 100 similarily constructed intervals would include the population porportion. (true or false)
Would you play this game if you wanted to make money? What do we expert the value of the results of the game to be?
Which of the following is true about the random variables X, Y, and Z?
Find out the earliest completion time for play and critical path.
Automobile manufacturers are interested in the difference in reaction times for drivers reacting to traditional incadescent lights and to LED lights.
Examine the two standard deviations. What do these indicate about the range of benefits enjoyed by the two groups?
To report their finding they want to create a 90% confidence interval. What would be the margin error for this confidence interval?
A research analyst regresses the number of calls for service (Y) on the Fahrenheit temperature at 4:00 in the afternoon (X). The regression equation finds: Y = 62 + 2.4 X with an r 2 of .67
For the following ANOVA table are the results from treating 4 cultures with 6 observations for each culture. The enzymes are contained in test tubes with differing levels of enzymes applied.
Simulate 50 observations from a normal distribution with mean 0 and standard deviation 1. make a normal plot.
Let's further suppose that there was good interrater reliability on these frequency counts of behaviours and that they are interval/ratio level of measure, normally distributed, and independent observations.
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