Ahigh school basketball players point totals for the regular season are normally distributed with a mean of 17 and a standard deviation of 4
sarah has a point z-score of 2.8
what is sarahs point total for the regular season? and does this point total seem unusual? explain

See below

Step-by-step explanation:

The formula for a z-score is

z = (x - µ)/σ     where µ is the mean, and σ is the standard deviation.  

We are given z = 2.8, µ = 17, and σ = 4.  Plug them and and solve for x, which will be her point total..

2.8 = (x - 17)/4

 11.2 = x - 17       (multiply both sides by 4 to get rid of the fraction)

   28.2 = x          (add 17 to both sides)

Yes, this score seems unusual.  A z-score of 2.8 puts her in the higher tier of point scorers for the season.  She scored 28.2 points in an entire season and was one of the highest scorers, so not many people are scoring points.

*Statistically, an unusual number is a number that is between 2 and 3 standard deviations above the mean.  Sarah's score is

2.8 standard deviations above the mean, so by statistical definition, her score is unusual.

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

i pretty sure it is