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Three coins are tosses 150 times and the number of times that 2 heads comes up is noted.
a.) Can the normal approximation to the binomial probability distribution be used?
b.) Calculate the probability that 2 heads came up less than 40 times, using the normal approximation
c.) Determine the probability that 2 heads came up more than 60 times, using the normal approximation
A random sample of 20 single men was asked if they would welcome a woman taking the initiative in asking for a date. What is the probability that none of the men will say yes?
The Jacksonian Era (roughly 1828-1845) was seen as a time where the voice and will of the American common man.
In past elections, the representative received 40 percent of the popular vote in that area of the state. She doubts whether it has changed much. How many registered voters should be sampled?
If a uniform prior is used for p, what is the posterior distribution and what are the posterior mean and standard deviation?
Imagine a shift manager at a manufacturing plant is gathering data on the number of units workers assemble during two different shifts over 10 different days.
Using an appropriate hypothesis test, at a 5% level of significance, can you conclude that there is any difference between the average value between houses that have a fireplace (Fireplace = 1) and houses that don’t have a fireplace (Fireplace = 0)?
for a particular company the number of sick days used by employees had a mean of 7 and a standard deviation of 2.a. a
write the complex number z -8 4 i in polar form z r cos theta i sin theta where r and theta the angle should
ShopperTrak is a hidden electric eye designed to count the number of shoppers entering a store. When two shoppers enter a store together, one walking in front.
Assume that 90 percent of all defendants are guilty, 90 percent of the guilty defendants are convicted, and 90 percent of the innocent defendants are set free.
1.a recent study investigated the extent to which hypertension is affected by alcohol consumption. among other things
Compute the sample variance and sample standard deviation as a measure of volatility of monthly total return for Chevron (to 2 decimals): Sample variance and Sample standard deviation.
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