Question
A researcher wanted to compare whetherlanguage makes a difference in recalling sequences of numbers. Each test involved briefly displaying a random sequence of digits and
A researcher wanted to compare whetherlanguage makes a difference in recalling sequences of numbers.
Each test involved briefly displaying a random sequence of digits and then asking the participant to recall as much of the sequence as they could.
The data collectedfor a sample of English speakers and a sample of Chinese speakers were as follows. The means given are the average number of digits that could beremembered from the sequence.
| English | Chinese | |
| Count | 36 | 26 |
| Mean | 7.12 | 8.18 |
| Median | 7 | 8 |
| StDev | 1.339 | 2.507 |
Calculate a 95% confidence interval for the difference (English score - Chinese score) in average recall for English and Chinese speakers and choose the correct answer. Use df = n1 + n2 - 2.
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A First Course in Differential Equations with Modeling Applications
Authors: Dennis G. Zill
11th edition
978-1305965720
