Question
R/Rstudio -Use the data set. which type of t-test will be appropriate is the average level of self-efficacy different from possible expected mean of 3.25.
R/Rstudio -Use the data set.
- which type of t-test will be appropriate
is the average level of self-efficacy different from possible expected mean of 3.25.
is the average level of blame assigned to a student for cheating different for males versus females.
is more blame was assigned to teachers or to students when cheating occurs.
data set and explanations- https://drive.google.com/drive/folders/12m_N2mKEgiD-UP_1SyTx3O8udJKsij4Q?usp=sharing
Concept Questions:
1What is a sampling distribution? What do we know about the shape and characteristics of the sampling distribution for the sample mean?
2What is the standard error of the mean?What information does the standard error provide?
As the standard deviation (s) increases, how does the standard error change (assuming n stays constant)?
As n increases, how does the standard error change (assuming s remains constant)?
3When a researcher reports a p value "p" stands for "probability" or risk.
a)What probability does this p refer to?
b)Do we typically want p to be large or small?
c)What is the conventional standard for an "acceptably small" p value?
4Suppose reaction times for recognition of common words like red or green are normally distributed with = 220 milliseconds and =30.A psychologist presents a sample of n=16 subjects with words that include names of colors.However, the color names are printed in a different color ink.That is, the word red might be printed in blue ink, or green might be printed in red.For these words, the sample had a mean reaction time of 240.
- Write the null hypothesis
- Write an alternative hypothesis
- What does it mean to fail to reject the null hypothesis? To reject?
- Draw a diagram (include the critical value and the test statistic value).
- Calculate the test statistic.
- Do these data indicate that that presenting color names in another color alters reaction time?
5A test of emotional intelligence was given to 239 women and 86 men.The results were as follows:For women, mean = 97.52 with a standard deviation of 10.34; for men, mean=88.23, standard deviation=11.61.Was this difference statistically significant (alpha = .05)? How large was the effect, as indexed by Cohen's d? [Note: Show your work for all steps of this problem.]
6How do each of the following influence the power of a statistical test: , n, effect size?
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started