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Average weight of goats in a farm is 125 pounds with the standard deviation of 12 pounds. Assume the distribution of the volume has a mound shape.
a. Approximately what percentage of goats is between 113 and 137 pounds?
b. About 95% of the goats will have weights that lie within what interval?
c. Approximately what percentage of goats weighs below 137 pounds?
Known that 15% of walls painted with this paint need more than 55 minutes to dry completely. Find the standard deviation of this distribution.
The manager of a department store wants to determine what proportion of people who enter the store use the store's credit cards for their purchases.
A study was completed that examined the relationship between coffee consumption and level of stress for a group of 50 undergraduate students. The correlation was .373, and it was a two-tailed test, done at the .01 level of significance.
Describe a hypothesis you have related to the area of psychology in which you are predicting a correlation. What is the specific nature (direction) of the correlation and why do you think it would occur?
the amount of fill weight of contents put into a glass jar of spaghetti sauce is normally distributed with mean ? 850
assume that iq scores are normally distributed with a standard deviation of 11 points and a mean of 100 points. if 140
you are sending out 60 invitations to a party.each person can bring a guest if they wish. suppose its equal probable
If HIV virus is actually present, the probability that ELIA test will give a positive result from ELISA is .01. If ELISA has given a positive result, use the Bayes' theorem to find the probability that the HIV virus is actually present.
When 319 college students are arbitarily selected and surveyed, it is observed that 120 own a car. Determine a 99% confidence interval for true proportion of all college students who own a car.
a stoplight at the corner of lincolnway and duff avenue is red 20 of the time. for someone who drives through this
the u.s. post office is interested in estimating the mean weight of packages shipped using the overnight service. they
What is the probability that a student who has failed the test came from the South District?
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