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A scientist wants to estimate the proportion of plants with berries growing in a particular region. They want to be within 6% of the true proportion when using a confidence interval of 99%.
How many plants must be sampled if no preliminary estimate is available?
Remember when calculating a sample size, we need to round UP to the next whole number (not the closest whole number) if needed.
If less than that many plants is sampled, which answer best describes what happened?Plants=_____
If less than that many plants are sampled, which of the following is true?
(A)The error is more than the desired error of 6%.(B)The error is less than the desired error of 6%.(C)The level of confidence must be increased.(D)The confidence interval must be widened.(E)A preliminary estimate is absolutely necessary.
A property of concern for any food company that uses a high-speed carton-filling machine to package juice is the weight of the food product in the individual cartons.
A student with a 3.5 to 4 grade point average who took standardized test is randomly selected. Determine the probability that students test score is less than 36.
Be sure to include information about how you would use the concept of probabilities to apply to profiles for hiring more satisfied individuals.
According to the National Institute for Occupational Safety and Health, job stress poses a major threat to the health of workers. A national survey of restaurant employees found that 75% said that job stress had a negative impact on their personal..
A large population of overdue bills has balances that fallow a normal curve. When we take a sample of 100 of these the average is $500 and the standard deviation is $100.
Assuming that the first digit cannot be a zero, compute the number of possible outcomes when the digits can be repeated.
Be certain to mention the direction of the relationship, the strength of the relationship, and whether our findings are statistically significant
A survey dating back to the 1990's suggested that Americans anticipated a reduction in living standards and that a steadily increasing consumption no longer might be as important as it was in the past. (Were they right?)
A loaf of bread is normally distributed with a mean of 22 oz. and a standard deviation of 0.5 oz. What is the probability that a loaf is less than 22.25 oz.?
At a party there are 30 students over age 21 and 20 students under age 21. You choose at random 3 of those over 21 and separately choose at random 2 of those under 21 to interview about attitudes toward alcohol.
The Confused Bricklayer Robot Problem - Draw a picture to illustrate the initial problem situation and how can you describe a possible solution?
The city of Laguna Beach operates two public parking lots. The one on Ocean drive can accommodate upto 125 cars and the one on Rio Rancho can accommodate upto 130 cars.
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