Math
Scores on a test are approximately normally distributed with a men of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students. What is the bottom cutoff for an A grade? Please round answer to the nearest whole number
Math
Find a 95% confidence interval for the true population portion. In a survey of 319 female employees of a large company, 29% said that they had experienced some form of sexual harassment while working for the company.
Math
The volumes of soda in quart soda bottles are normally distributed with a mean of 32.3 oz and a standard deviation of 1.2 oz. What percentage of bottles contain less than 32 oz of soda?
Math
Assume that math SAT scores are normally distributed with a mean of 500 and a standard deviation of 100. A score of 560 reprecents what percentile? Please round answer to the neareast tenth.
Math
Diven the data 3.5,1.6,2.4,3.7,4.1,3.9,1.0,3.6,4.2,3.4,3.7,2.2, and using the range rule of thumb, what is the standard deviation?
statistics
Given the data 22,29,21,24,27,28,25,and 36 - and using the range rule of thumb - what is the standard deviation?
math
how do you arrange these numbers to make this equation true 7,26,46,15 to =160 Please help.....
math
how do you arrange these following numbers to make this equation true 18,9,24,20 and to =18 please help....
economics
Thank you Ms. Sue.
College Algebra
$20,000+1+6.2^-6
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