Suppose Z follows the standard normal distribution. Use the calculator provided, or this table, to determin is true. P(-c ≤Z≤c) = 0.9216 Carry your intermediate computations to at least four decimal places. Round your answer to two decimal

A neuroscientist wants to know if physical exercise changes reaction speed in elderly people.   A total of 14 older volunteer participants were found.  One sample of n = 7 subjects received an exercise treatment, while the second sample (n = 7) of participants were given stretching lessons for the same amount of time per week.  Reaction speed was tested on a computer program after six weeks of treatment. Reaction speed was measured in milliseconds.  Data shown below. What is the type of statistical test you could use on these data? _____________________ Why this test? ___________________________________________________________ What is the I.V.? ___________________   What is the D.V.? ______________________                 Use the data below to fill in the blanks to compute your tcalculated.                     stretch group                                                                    exercise group nstretch = ____         dfstretch = _____                               nexercise…

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While an independent samples t-test compares two separate groups of people, a paired sample t-test compares the same group of people over time or across two different treatments or events or etc.    True  False

t has been suggested that gossiping about others may affect how likeable you are. Two groups of participants are asked to read a vignette describing a fictional person. They are then asked to rate how much they would like the person described in the vignette on a continuous scale from 1-15, where higher scores represent a higher likability. The first group of participants (n=20) reads a vignette describing a person that frequently gossips and obtains an average likability score of (M1) with a variance of (S12). The second group of different participants (n=20) reads a vignette describing a person that never gossips and obtains an average likability score of (M2) with a variance of (S22). Given that there is not much research in this area, test the hypothesis that gossiping impacts likability at an alpha=0.05.  1, Are the results you obtained meaningful? report the results here for your effect size showing all your work and your interpretation  2. Report the results of the study…

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Find the mean and standard deviation for each uniform continuous model.(Round "Mean" answers to 1 decimal place and "Standard deviation" answers to 4 decimal places. a. U(3, 13) b. U(90, 190) c. U(3, 99)

Find the mean and standard deviation for each uniform continuous model.(Round "Mean" answers to 1 decimal place and "Standard deviation" answers to 4 decimal places.  a. U(3,13)