Solution-Write the null hypothesis in mathematical form

Write the null hypothesis in mathematical form

Assignment Help Applied Statistics

Reference no: EM13838732

Applied Statistics Laboratory

Brain size and autism

Studies have linked brain size in infants and toddlers to a number of future ailments, including autism. One study looked at the brain sizes of 30 autistic boys and 12 non-autistic boys ( the control group), all of whom had undergone an MRI scan as toddlers. The data shown in the following are the whole-brain volumes (in millilitres) from the MRI scans. Investigate whether the mean whole-brain volume in early life is different between autistic and non-autistic boys.

Source: Courchesne, E., et al. (2001), "Unusual brain growth patterns in early life in patients with autistic disorder: an MRI study", Neurology, 57, 245-254

Autistic

1311 1250 1292 1419 1401 1297 1202 1336 1308 1353

1515 1461 1365 1364 1362 1303 1278 1247 1333 1340

1319 1286 1223 1241 1229 1209 1171 1154 1128 1230

Control

1040 1180 1207 1179 1115 1133 1298 1263 1194 1198

1230 1114

Answer all the following questions (See 'Writing Up Your Take-Home Test' in the cover page)

1. Construct the data-frame in EXCEL and import it to "R". For your answer, provide a screen-shot displaying the dataframe in "R".

(Tips: Determine the number of subjects and the number of variables. Include sensible names for the vairables.)

(Instructions for the Screen-shot: Import the data to "R". Display the data frame in "R" by clicking on the "view data set" button. Then, use 'print-screen' (found on your keyboard) to copy the screen with the the data set; control-V to paste it in MS Word; click on the picture, select 'crop' from the 'format' tab and crop the picture; press 'ESC' when finish cropping; resize the picture appropriately.)

2. Construct the appropriate conditional boxplots using "R". Give interpretation of the boxplots.

3. State the aim of the investigation.

4. What is the appropriate statistical procedure for this investigation?

5. Write the null hypothesis in mathematical form; and in plain English.

6. Write the alternative hypothesis in mathematical form; and in plain English.

7. State the model assumption(s) and assess them.

8. Perform the statistical procedure and present (copy and paste) all the results generated by "R". Include all figures, plots and tables, if any.

9. Interpret the p-value.

10. Based on the results of the above statistical procedure, give a conclusion of the study.

Reference no: EM13838732

Questions Cloud

Create an advertising and marketing plan for a sports center : Create an advertising and marketing plan for a sports center (Judo) and share ideas. We must know how to sell our center so that it does not fall back instead of growing.

What is the voltage v : In the following circuit, the current i equals cos 2πt. What is the voltage v?

The making of public policies that address infrastructure : Which level of government should take the lead in the making of public policies that address infrastructure.

Compatibility and manufacturing purposes : For compatibility and manufacturing purposes it has been decided that the shaft is to be machined from carbon steel (σyy = 250 MMaE = 210 GPa).

Write the null hypothesis in mathematical form : Write the null hypothesis in mathematical form; and in plain English. Write the alternative hypothesis in mathematical form; and in plain English. State the model assumption(s) and assess them.

How would you use your knowledge of the coping process : Six days after surgery she is sad, depressed, and not eating. She states that she does not feel she will ever get better or go home. How would you use your knowledge of the coping process to help her?

What is the p value of the test : ENGM 6671 Suppose that the engineer wants to be 95% confident that the estimated mean highway fuel consumption rate is within 0.1 `/100 km of the true mean highway consumption rate. How many vehicles should be sent out? Suppose that the company wants..

Describe the impact of multiple media on violence : Describe the impact of multiple media on violence in society. Examine whether violence in media promotes the normalization of aggression or facilitates a lack of empathy in children and perhaps even adults. Why or why not

User Account

All Pages

Write the null hypothesis in mathematical form

Reference no: EM13838732

Reference no: EM13838732

Questions Cloud

Reviews

Write a Review

Applied Statistics Questions & Answers

Hypothesis testing

Calculate the maximum reduction in the standard deviation

Calculate the expected value, variance, and standard deviati

Determine the impact of social media use on student learning

Unemployment survey

Statistical studies

Evaluate the expected value of the total number of sales

Statistic project

Simple data analysis and comparison

Analyze the processed data in statistical survey

What is the probability

Frequency distribution

Assured A++ Grade

Academics

Major Subjects

Majors

Get In Touch

TERMS & POLICIES

HELP & SUPPORT