(a) Is this an experiment or an observational study? Experiment Observational study (b) How many rows and how many columns will the data table have? Assume rows are the cases and columns are the variables. (There might be an extra column for identification purposes; do not count this column in your total.) Number of rows: Enter your answer in accordance to item (b) of the question statement Number of columns: Enter your answer in accordance to item (b) of the question statement (c) Display the results of the study in a two-way table. Gene break No break Total Dyslexia group Enter your answer in accordance to item (c) of the question statement Enter your answer in accordance to item (c) of the question statement Enter your answer in accordance to item (c) of the question statement Control group Enter your answer in accordance to item (c) of the question statement Enter your answer in accordance to item (c) of the question statement Enter your answer in accordance to item (c) of the question statement Total Enter your answer in accordance to item (c) of the question statement Enter your answer in accordance to item (c) of the question statement Enter your answer in accordance to item (c) of the question statement (d) To see if there appears to be a substantial difference between the group with dyslexia and the control group, compare the proportion of each group who have the break on the DYXC1 gene. Round your answers to three decimal places. Proportion for dyslexia group: Enter your answer in accordance to item (d) of the question statement Proportion for control group: Enter your answer in accordance to item (d) of the question statement (e) Does there appear to be an association between this genetic marker and dyslexia for the people in this sample? Yes No (f) If the association appears to be strong, can we assume that the gene disruption causes dyslexia? Yes No

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Is There a Genetic Marker for Dyslexia?

A disruption of a gene called DYXC1 on chromosome 15 for humans may be related to an increased risk of developing dyslexia. Researchers¹ studied the gene in 109 people diagnosed with dyslexia and in a control group of 195 others who had no learning disorder. The DYXC1 break occurred in 10 of those with dyslexia and in 5 of those in the control group.

¹Science News, August 30, 2003, p 131.

(a) Is this an experiment or an observational study?

Experiment

Observational study

(b) How many rows and how many columns will the data table have? Assume rows are the cases and columns are the variables. (There might be an extra column for identification purposes; do not count this column in your total.)

Number of rows: Enter your answer in accordance to item (b) of the

question statement

Number of columns: Enter your answer in accordance to item (b) of the question statement

	Gene break	No break	Total
Dyslexia group	Enter your answer in accordance to item (c) of the question statement	Enter your answer in accordance to item (c) of the question statement	Enter your answer in accordance to item (c) of the question statement
Control group	Enter your answer in accordance to item (c) of the question statement	Enter your answer in accordance to item (c) of the question statement	Enter your answer in accordance to item (c) of the question statement
Total	Enter your answer in accordance to item (c) of the question statement	Enter your answer in accordance to item (c) of the question statement	Enter your answer in accordance to item (c) of the question statement

(d) To see if there appears to be a substantial difference between the group with dyslexia and the control group, compare the proportion of each group who have the break on the DYXC1 gene.

Round your answers to three decimal places.

Proportion for dyslexia group: Enter your answer in accordance to item (d) of the question statement

Proportion for control group: Enter your answer in accordance to item (d) of the question statement

(e) Does there appear to be an association between this genetic marker and dyslexia for the people in this sample?

Yes

(f) If the association appears to be strong, can we assume that the gene disruption causes dyslexia?

Yes

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