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

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:

Hence, the expected scores is approximately between 300 and 700

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step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2