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510 people were asked which of four fast food restaurant were their favorite. Determine if there is a preference for any one place over any other.
McDonald's: 155
Wendy's: 130
Taco Bell: 115
Arby's: 110
Which statisical procedure should be used?
Temperature is used to measure the output of a production process. When the process is in control , the mean of the process is 128.5 and the standard deviation is 0.4
By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 3.22 seconds.
Two people are playing a game. Only one dice is thrown. If the outcome is a 2 or a 3, then player 1 pays player 2 $6. How much should player 2 pay player 1 when a 1, 4, 5 or 6 is thrown so that player 1 and 2 break even
The 99% confidence interval using a t-distribution is ( ), ( ). Round to one decimal place as needed
The shell thicknesses of the eggs produced by a large flock of hens follow approximately a normal distribution with mean equal to 0.38 mm and standard deviation equal to 0.03 mm. Find the 95th percentile of the thickness distribution.
Can the researcher conclude that humidity has a significant effect on eating behavior? Use a two-tail test with α = .05.
Out of 1000 people surveyed, 600 belonged to urban areas and rest to rural areas. Among 500 who visited other states , 400 belonged to urban areas. Test 5 % level of significance whether area and visiting other state are dependent.
Test the hypothesis that the true Pearson correlation (p) is significantly different from zero. Provide a (p) value (two-tail) n=12. Correlation intake is .448 for the two recording methods.
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
A seminar is given to three levels of managers (highlevel, midlevel, lowlevel).The facilitators believe the evaluations may vary with the audience.
Do these simulated data provide evidence for us to conclude that a difference in the spinal canal cross sectional area exist between the population of subjects with disc hernination and a population of those who do not have disc hernation?
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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