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Suppose that the average score on the GMAT exam is 500 and that the standard deviation of all scores is 100 points. You would expect approximately 95% of all GMAT scores to be between400 and 600
300 and 700
200 and 800
350 and 650
250 and 750

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Answer:

300 and 700

Step-by-step explanation:

-We use the t-statistic and sample mean to generate the desired confidence interval.

-Given that the average score is 500 and standard deviation is, we calculate the confidence interval as:

[tex]\mu=\bar \x\pm t(s_M)\\\\=500\pm1.96\times 100\\\\={304.00,696.00]\approx [300,700][/tex]

Hence, the expected scores is approximately between 300 and 700

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