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i want someone to draw a bell shaped curve according to the above information!!!
Unformatted Attachment Preview
UL
No.
Date
9
@Px5.25600)
0.6772
Pl 2 < 26789-25.000
3204
p(2 0-46)
0.5 + 0.1972
= 0.6772
2Sooo 3204
0.5596
B-Plx> 26000)
-P( 2 > 26459-26000
P (270.15)
3204
= 0.5-0.0596
0.5596
3doy
26000
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Obtain the mean and standard deviation for ACT Math scores for each class level (freshmen, sophomores, juniors, seniors) and interpret the results
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Do all of the work below with the Database of Math ACT scores attached below
Data: Use StatCrunch (in MyLab Statistics) to obtain results for the following questions.
A) Exploratory Data Analysis
Obtain the mean and standard deviation for ACT Math scores for each class level (freshmen, sophomores, juniors, seniors) and interpret the results
Obtain the five number summary of ACT Math score for each class levels. Do any of these class levels have outliers?
Construct a boxplot and use it to investigate the data for outliers
Construct a histogram, and normal probability plot (QQ Plot) for ACT Math score for each class level.
B) Inferential Statistics
Construct and interpret a 95% confidence interval for µ, for the mean ACT Math score for each class level.
Using regression analysis (hint, use scatter plot, r, r2 ) , investigate if there is a relationship between Age and performance in ACT Math score.; . provide an equation can be used to predict ACT math score based on age,
Write a Summary and Findings of the Project
C) Write-up
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o Interpret the mean, and standard deviation in context of the data given.
o Compare the measures of center and comment on which measure of center would best describe the data given.
o Comment on the shape of the distribution, which class level appears to be more approximately normal
o Are there any outliers in the data? Include results of your investigation for outliers. Identify which class level has an outlier
o Comment on your assessment of normality.
o Which test will be most appropriate for the inferential statistics (confidence Interval)? Z-test or t-test? Why?
o Write an interpretation for the confidence interval estimate in context of the data.
o State the summary, interpretation and conclusion of your Investigation if there is a relationship between Age and performance in ACT Math score of undergraduate student at UVA.; Provide an equation can be used to predict ACT math score based on age; how reliable would the prediction be?
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