PRACT STAT W/ ACCESS 6MO LOOSELEAF
PRACT STAT W/ ACCESS 6MO LOOSELEAF
4th Edition
ISBN: 9781319215361
Author: BALDI
Publisher: Macmillan Higher Education
Question
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Chapter 28, Problem 28.9AYK

(a)

To determine

To make a scatterplot of the percent reacting as a function of the number of light pulses with two separate lines representing the two subpopulations and describe the shape of the relationship and find out what does it suggest about the pattern of withdrawal responses in the two subpopulations of C for increasing numbers of light pulses and how does your answer fit in the context of habituation and explain why these results suggest an involvement of PVD sensory neurons in nociception and habituation.

(b)

To determine

To use a software to obtain the statistical analysis of the linear regression of the percent reacting ( y ) as a function of the number of light pulses ( x1 ) and the indicator variable IndMutant ( x2 ) and find out what is the regression equation for this model.

(c)

To determine

To explain is the overall model significant and what percent of variation in percent reacting is explained by the model.

(d)

To determine

To explain are the regression coefficient for the two explanatory variables significant.

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To  evaluate  the  success  of  a  1-year  experimental  program  designed  to  increase  the  mathematical achievement of underprivileged high school seniors, a random sample of participants in the program will be selected and their mathematics scores will be compared with the previous year’s  statewide  average  of  525  for  underprivileged  seniors.  The  researchers  want  to  determine  whether the experimental program has increased the mean achievement level over the previous year’s statewide average. If alpha=.05, what sample size is needed to have a probability of Type II error of at most .025 if the actual mean is increased to 550? From previous results, sigma=80.
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