SCENARIO 12-13 Recent Studies Have Found That American Children Are More Obese

question 169

Multiple Choice

SCENARIO 12-13
Recent studies have found that American children are more obese than in the past. The amount of time children spent watching television has received much of the blame. A survey of 100 ten-yearolds revealed the following with regards to weights and average number of hours a day spent watching television. We are interested in testing whether the mean number of hours spent watching TV and weights are independent at 1% level of significance.
-Referring to Scenario 12-12,suppose we want to constrain the probability of committing a Type I error to 5% when testing whether there is any relationship between average time spent watching TV and average time spent reading story books,the critical value will be

• A)5.991
• B)7.378
• C)12.592
• D)14.449

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Definitions:

COUNTIF

A function in spreadsheet software that counts the number of cells within a range that meet a single criterion.

Stacked Bar Chart

A graphical representation of data where different categories are stacked on top of each other to show the total and the individual proportions of each category.

Stacked Column Chart

A graphical representation that displays multiple categories of data stacked on top of each other in vertical columns, useful for comparing totals and relationships within data.

Stacked Histogram

A type of histogram that enables visualization of the distribution of a data set by stacking different categories of data on top of each other in order to compare distributions between categories.