4) A small computing center has found that the number of jobs submitted per day

Question

4) A small computing center has found that the number of jobs submitted per day to its computers has a distribution that is approximately bell shaped, with a mean of 75 jobs and a standard deviation of 8 where do we expect most (approximately 68%) of the distribution to fall? 5) A study was designed to investigate the effects of two variables -(1) a student's level of athematical anxiety and (2) teaching method- on a student's achievement in a mathematics course. Students who had a low level of mathematical anxiety were taught using the traditional expository method. on a standardized test. Assuming a bell-shaped distribution, what percentage of scores exceeded 540? These students obtained a mean score of 500 with a standard deviation of 40

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Remember this rule:

For the normal distribution, the values within onestandard deviation of the mean account for 68.27% of the set; while within two standard deviations account for 95.45%; and within three standard deviations account for 99.73%.

68% is approx 1 SD away from mean

Mean = 75

SD = 8

So,

We expect most jobs to fall between = {75 - 1 * 8, 75 + 1 * 8}

We expect most jobs to fall between = {67, 83}

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