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Am trying to understand the proper way to phrase the null and test hypothesis for a two sample test and to determine if I am properly rejecting the null hypothesis.
Question: Determine if there is evidence to conclude that the mean number of vacations taken by married individuals is less then the number taken by single/divorced individuals using data in Excel file vacation survey.
Suppose an airport scanning device has 98% accuracy in detecting certain kinds of metal objects (98% of people carrying these objects are correctly identified as carriers and 98% of people not carrying them are correctly identified as non-carriers..
Cast a die a number of independent times until a six appears on the up side of the die. Find the probability density function F(x)= P(X
Sun Love grapefruit growers have determined that the diameters of their grapefruits are normally distributed with a mean of 4.5 inches and a standard deviation of 0.3 inches.
Calculate the standard error of estimate for the regression equation.
Why do you use the chi-square statistic? What type of data is used with chi square analysis?
CRA CDs Inc. wishes mean lengths of "cuts" on a CD to be 132 seconds (2 minutes and 12 seconds). This will permit disk jockeys to have plenty of time for commercials in each 10-minute segment.
This morning the office you are monitoring has eight office visits on the schedule. What is the probability that:
A bag of jelly belly candies contains the following colored jelly beans: red (10), blue (2), orange (5), brown (21), green (0), and yellow (18). Construct the probability distribution for x.
You're in charge of an experiment to evaluate a treatment which is advertised as being 90% effective at killing a particular insect. You plan an experiment in which the treatment is tested on 200 insects.
The 'interaction effect' was also important. By using the means in the table above write a statement explaining how the anti-anxiety drug appears to affect anxiety. Are the outcomes consistent with the hypothesis proposed by the researchers?
Among 100 people randomly chosen in a survey, exactly 10 stated that they believed that the elected representatives are honest most of the time.
Does the confidence interval contain the value of 35 mm, which is believed to be the standard deviation of sitting heights of women?
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