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A researcher finds a correlation between self esteem and shyness is -0.50, which is significant for his sample. Interpret this correlation.
What does a correlation coefficient tell us? Why are correlation coefficients useful when assessing reliability?
What are the 2 ways in which researchers assess the reliability of their measures? Be sure you understand the difference among these 2 approaches to reliability.
What is validity with respect to a research project? Discuss the different types.
What is validity with respect to the measurement of a psychological construct?
The lifetime of African Cichlids is unknown but the sample of 75 cichlids were taken and its mean life time was 5.2 years with a margin error of 420 days for 95% confidence a) What is the 95% confidence interval for the lifetime of the African fish..
Create a histogram for the following data of the number of miles from residence to place of employment for 30 randomly selected residents of Middletown County.
Illustrate what does weighting add to usefulness of moving averages and explain how is it done. The yield on a thirty year treasury note at the end of every year since 1990 is recorded below.
Assume the population is normally distributed, the confidence level is 95%, n = 12, and σ is unknown.
Is there a significant difference in mean fetal heart rates by position? Run the test at a 5% level of significance.
How much evidence is there that the mean composite satisfaction rating exceeds 42?
How to calculate expected difference between the samples means, and how does larger variability affect the size of the standard error for the sample mean difference?
To find out whether the course is effective in increasing sales, the appropriate set of hypothesis for testing is:
Use alpha level. 05 to compute and interpret Pearson's r and to test whether it is important (using all your steps for hypothesis test).
One of the most important uses of a correlation is its potential use in_________
For a sample of students in the college of business administration at mid-atlantic university, the mean grade point average is 3.10 with a standard deviation of 0.25.
There were 25 subjects included in each of the combinations of gender and smoking status. One of the variables measured was the heart rate after six minutes of exercise. A two-way ANOVA is performed with the resulting ANOVA table given below
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