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A population of cereal boxes has a normal weight with a mean of 16 ounces and a standard deviation of 0.2 ounces. If a box is chosen at random what is the probability that it will weigh less than 15.3 ounces? If a sample of 9 boxes is randomly chosen, what is the probability that the mean will be less than 15.3 ounces? If a sample of 25 boxes is randomly chosen, what is the probability that the mean will be less than 15.3 ounces? If you were in charge of filling the boxes and the sample of 25 boxes that you chose had a mean of 15.3 ounces what action would you take?
Standardized measures seem to indicate that the average level of anxiety has increased gradually over the past 50 years. In the 1950s, the average score on the child manifest anxiety scale was µ=15.1. A sample of n=16 of today's children produces ..
A standard deviation of 40.7. All units ate in mg/100mL. Find the two levels that separate the top 9% and the bottom 9%.
Average electric use was studied.a previously known population standard deviation was 450KWH. a sample of 81 houses was studied and found to have a mean of 1858 KWH. Find the 95% confidence interval for the true mean.
What is approximately the largest sample mean of another sample of n= 16 participants you would expect to obtain from this finite population?
Prove that there are no integers x, y, and z such that. Show that square root of 2 cubed is an irrational number.
a random sample of 81 students at a local university showed that they work an average of 60 hours per month with a
If the sales, employment, production, and other business series increase or decrease over a period of time and approximate a straight line, the equation for this growth is given by
Following data on x=weight (in pounds): x 1 33.5, x2 27.3, x3 36.7, x4 30.5 Suppose that one more piece is selected; denote its weight by x5. Find a value of x5 such that X = smaple median.
a lock on a bank vault consists of three dials each with 30 positions. in order for the vault to open each of the three
find how many positive integers with exactly four decimal digits that is positive integers between 1000 and 9999
Standard deviation is $0.10. At α = 0.01, is there significant difference in price? Determine the 99% confidence interval of the difference in the means.
A woman sells an average of 300 books per month, with a standard deviation of 50. Over the next ten years, how many months will she sell more than 375 books?
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