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Finding probability for the given data using normal approximation
Use the normal distribution to approximate the desired probability.
A coin is tossed 20 times. A person, who claims to have extrasensory perception, is asked to predict the outcome of each flip in advance. She predicts correctly on 11 tosses. What is the probability of being correct 11 or more times by guessing? Does this probability seem to verify her claim?
a..0871, yes
b..4129, yes
c..0871, no
d..4129, no
Now we would like to evaluate regression equation for X using Y as independent variable.
What is the probability that Sara will die in her 60 th year? Using this probability and the $50,000 death benefit, what is the expected loss to Big Rock Insurance?
Calculate the coefficient of skewness and coefficient of variation of minutes spent commuting. What do these statistics tell us?
Test the whether the attitude toward keeping weight down associated with smoking status.
You draw two cards from a standard deck of 52 cards, but before you draw the second card, you put the first one back and reshuffle the deck.
Find the probability that the number of who consider themselves basketball fans is :
Assume that preparation D was a placebo. Use the Scheffe's procedure to compare the average response of A, B, C, and E to the response for D.
Testout the significance of the sample correlation also develop regression equation with scatter plot. Calculate chi-square is less than the critical value
Determine the mean and standard error of the x - bar distribution.
Four wheel bearings have been replaced on a company car. The mechanic has selected 4 bearings from a large supply bin. The mechanic is unaware that 10 percent of the bearings fail within the first 100 miles.
Last school year, student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year's student body showed the following number of students in each classificati..
Find a 90% confidence interval for the mean amount left by all groups.
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