A disruptiоn оf а gene cаlled DYXC1 оn chromosome 15 for humаns 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? __________(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: __________Number of columns: _____________(c) Display the results of the study in a two-way table. Gene break No break Total Dyslexia group Control group Total (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: ____________Proportion for control group: ______________(e) Does there appear to be an association between this genetic marker and dyslexia for the people in this sample? Yes or No(f) If the association appears to be strong, can we assume that the gene disruption causes dyslexia? Yes or No
The US Centers fоr Diseаse Cоntrоl conducts the Nаtionаl Youth Tobacco Survey each year. The preliminary results1 of 2019 show that e-cigarette use is up among US teens while cigarette use is down. In the sample of 1582 teens, 92 reported smoking a cigarette in the last 30 days. 1 LaVito A, “CDC says teen vaping surges to more than 1 in 4 high school students,” CNBC Health and Science, September 12,2019.a) Give the notation of the parameter we are estimating _____ Give the notation of the sample statistic: _____(b) What is the best estimate for the parameter we are estimating? Round to three decimal places._____________(c ) Find the 99% confidence interval? Round to three decimal places.________ to __________(d) What is the margin of error? Round to three decimal places. _____________