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The manufacturers of Ramen noodles, a staple food of the average college student, are concerned that the sodium levels in their product vary too much. A package of Ramen is supposed to contain 1100 mg of sodium with a standard deviation of 110 mg. A sample of 20 packages was analyzed and the sample standard deviation was 192.5736 mg. Is there evidence at α = 0.005 that the standard deviation of the sodium content exceeds the desired level? Assume the population is normally distributed.
A salesperson goes door-to-door in a residential area to demonstrate the use of a new household appliance to potential customers. She has found from her years of experience that after demonstration, the probability of purchase (long run average) i..
1. if know just the true values of a deductive argument's premises, then you will know whether the argument is sound T or F?
with a mean of 74 and standard deviation of 16. what is the proportion of healthy people will have cbf readings between
XTRA Inc. has beginning-of-the-year present values for its projected benefit obligation and market-related values for its pension plan assets.
Please share 3 real world examples of problems, which occurred due to the use of secondary data. Be specific about the consequences as well the secondary data used. You may use your own organization or research the net or literature for this one.
What is the difference between a probability sample and a nonprobability sample? Which type is necessary if we wish to statistically generalize from the sample to the population?
The researcher then records the level of activity for each child during a 30 minute session on the playground. Is this an experimental or a correlation study? Explain your answer.
in a study by peter d. hart research associates for the nasdaq stock market it was determined that 20 of all stock
What are the estimates for parameters of the independent variables? What are the p-values of the t tests for the independent variables?
If 112 moles of ideal mono-atomic gas initially at 500 kPa undergoes isothermal expansion from 0.555 m3 to 2.56 m3 then
A period of economic contraction (when the economy not only doesn't grow it actually shrinks) characterized by falling prices and high unemployment is known as an economic
For a recent year, the mean fare to fly from Charlotte, North Carolina, to Seattle, Washington, on a discount ticket was $267. A random sample of round-trip discount fares on this route last month gives:
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