Question

            It is well known that increasing room illumination up to some level increases reading comprehension.  A random sample of 10 sixth-grade students read standardized passages under two levels of ambient room illumination: 5 foot candles and 15 foot candles (more candles, more light). The order in which the conditions were presented was randomized and reading sessions were separated by an interval of 2 hours. A higher score reflects better reading comprehension. Test this well-known belief.

Participant                             5 foot                          15 foot

1                                              88                                92

2                                              92                                91

3                                              86                                88

4                                              84                                89

5                                              90                                95

6                                              86                                86

7                                              88                                95

8                                              90                                92

9                                              84                                88

10                                            82                                88

Answer 1

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