Suppose x is a normally distributed random variable with μ = 14 and σ =2. Find each of the following probabilities.

a. P (x ≥ 16) b. P (x ≤ 11) c. P (15.24 ≤ x ≤ 19.3) d. P (8.5 ≤ x ≤ 17.34)

Question

Suppose x is a normally distributed random variable with μ = 14 and σ =2. Find each of the following probabilities.

a. P (x ≥ 16) b. P (x ≤ 11)   c. P (15.24 ≤ x ≤ 19.3)   d. P (8.5 ≤ x ≤ 17.34)

anonymous · Answer

Can you use a ti 83 or such calculator. If so then A) could be solved by normcdf(16,1E99, 16,2). Since the format for this is normcdf (lowerbound, upperbound, mean, standard deviation)

anonymous · Answer

I have a TI BA II and have no clue how to use it.

anonymous · Answer

The other way is where you convert each to a z-score and then use the z-score table.

anonymous · Answer

Yes I tried that whith a similar problem where I wrote each step down and somehow I got part of the question right and the others were not close. My issue is that I do not have a solid foundation in algebra and it is difficult for me to comprehend