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Pens are sold in packets of 15 pens per packet. The pens are of different colour and 20% are red.
a) Show the the probabilty of a randomly chosen packet of pens containing 3 or more red ones is 0.602
b) James buys 6 packets of pen. Find the probabiltiy that atleast 5 or the packets contain 3 or more red pens.
Probability for simple and compound events.A certain bowler can bowl a strike 70% of the time. What is the probability that she.
When an experiment is conducted, one variable is manipulated to see the impact on another variable -- that's why experiments address causation.
The samples do indicate that university A's students are younger than university B's; but is the difference significant at the 1% level?
the quality-control manager at a light bulb factory needs to determine whether the mean life of a large shipment of
Test the hypothesis that = 800 hours against the alternative 800 hours if a random sample of 30 bulbs has an average life of 788 hours. Use a 0.04 level of significance.
What is the correlation between x3 and x2 and what is the pdf of x?
Pollsters try to determine whether or not a person is a "likely voter" before they count their opinion in a poll. If we assume 40% of the registered voters will actually vote, in a random sample of 100 registered voters we can be 95% confident tha..
is the student grade classification at baylor the same as it is for other universities? in the united states. of those
How large a sample is needed to estimate the true proportion of covered children with 90% confidence with a confidence interval of .05.
a random sample has been taken from a normal distribution. output from a software package is given belowvariable xn
A researcher is analyzing a dataset to determine whether the independent variables predict students' reading level.
Proportion of free throw attempts that are successful. In the NBA, FT% is normally distributed with a mean of 0.721 and a standard deviation of 0.082. Which percentage of NBA players have a FT% lower than 0.784?
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