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U.S. Department of agriculture date reveal small farms in the USA number one million owners. Small farm data show acreage farmed per owner is normally distributed with a mean of 20 acres and a standard deviation of 3 acres. calculate the following:
a. The percentage of owners that farm at least 18.1 acres.
b. The number of owners that farm at least 18.1 acres.
c. The minimum acreage farmed by the 5% of owners farming the largest amount of acreage.
d. If one owner from the USA is selected at random, what is the probability that owner farm more than 18.1 acres or less than 13. acres?
The sample mean was $22,098 and the standard deviation was $6050. Is there evidence at the 1% significance level that the cost of attendance has increased?
The z-score of 1.33 tells you that Eric's time to get to work is 1.33 standard deviations from the mean.
at appalachian state university it is known that 48 of undergraduates are male. if a sample of 125 undergraduate
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Find the probability that a randomly selected employee earns less than $5.43.
Mmen will have a heart attack in the next 5 years. How large a sample would we need to have an 80% chance of finding a significant difference if the true rate of heart disease in this group is 13%?
A manager hopes to improve the sales figures for 10 employees by sending them to a motivational seminar. To test the effectiveness of this seminar
A woman has n keys, of which one will open her door. (a) if she tries the keys at random, discarding those that do not work, what is the probability that she will open the door one her kth try?
Do time series models rely heavily on cause and effect relationships between variables in order to ensure accurate predictions?
A roulette wheel has 38 slots, numbered 0, 00, and 1 to 36. The slots 0 and 00 are colored green, 18 of the others are red, and 18 are black.
Let X be a random variable which is distributed normal with mean 200, but you don't know the standard deviation. Do pairwise comparisons (greater than, equal to, less than or can't say) for the following four quantities:
An occupational health study was carried out to evaluate the health status of workers. The response is forced expiratory volume (FEV), a measure of respiratory function
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