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AJACW22

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)

  • 10 months ago
  • 10 months ago

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  1. mjt042
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    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)

    • 10 months ago
  2. AJACW22
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    I have a TI BA II and have no clue how to use it.

    • 10 months ago
  3. mjt042
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    The other way is where you convert each to a z-score and then use the z-score table.

    • 10 months ago
  4. AJACW22
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    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

    • 10 months ago
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