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Which do you respond faster to, a visual signal or an auditory signal? The reaction times (RT) of seven students were measured for both signals. Decide whether the study is an independent- or paired-samples design, analyze the data, and write a conclusion.
Auditory RT(seconds)
Visual RT (seconds)
0.16
0.18
0.19
0.20
0.14
0.17
0.13
0.21
a committee is to consist of 50 randomly chosen united states senators. find the expected number of different states to
A random sample of 15 customers is selected, and the results are as follows: 8.02 4.08 5.79 8.73 5.47 5.64 8.01 10.49 8.35 5.9 9.66 9.91 3.82 6.68 6.17 a) calculate arithmetic mean, median, mode, first quartile and third quartile.
generate numerical and graphical descriptive statistics for each variable. which tests is this asking for? there are 4
How do you go about calculating different probabilities--say an item was selected at random and we wanted to know how far it is from the mean or the probability that it is at least 4.5 or more?
a) Based on current equipment: What is profit when selling 35,000 units? b) Based on new equipment: What is profit when selling 60,000 units? c) Based on your profit calculations-should the company buy the new equipment?
A retail federation conducted a nationwide survey of 1000 adults last October and found that approximately 55% of the respondents planned to do some type of Halloween decorating.
In the experiment, the waiter would ?ip a coin to determine whether he would stand or squat next to the table. The waiter would record the amount of the bill and of the tip and whether he stood or squatted. Describe the treatments and the respo..
the probability of successfully rehabilitating a convicted criminal in a penal institution is 0.40 . a random sample of
one article reports that in a sample of 413 male college students the average number of energy drinks consumed per
Describe whether the data appear to be approximately normally distrusted by .. a. Comparing data characteristics to theoretical properties.
At the present we are able to fit continuous data with several different models. One way to check the adequacy of the fit is with a probability plot. Consider that following small data set consisting of five observations.
Sketch density curves that might explain distributions with fallowing shapes: symmetric, but with two peaks( i.e., two strong clusters of observations)
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