Sound it out: Phonics is an instructional method in which children are taught to connect sounds with letters or groups of lette A sample of 135 first-graders who were learning English were asked to...

Extracted text: Sound it out: Phonics is an instructional method in which children are taught to connect sounds with letters or groups of lette A sample of 135 first-graders who were learning English were asked to identify as many letter sounds as possible in a period of one minute. The average number of letter sounds identified was 34.04 with a standard deviation of 23.62. Part: 0/2 Part 1 of 2 (a) Construct an 80% confidence interval for the mean number of letter sounds identified in one minute. Round the answers to at least two decimal places. 00 An 80% confidence interval for the mean number of letter sounds identified in one minute is