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Hi can someone help me with this question?, I keep on getting a probability of 2.33=.99010 but the answer is supposed to be .99018. Where am I going

Hi can someone help me with this question?, I keep on getting a probability of 2.33=.99010 but the answer is supposed to be .99018. Where am I going wrong?

285-250= 35/15= 2.33


Question   Assume that the sales of Teri's Specialty Cakes has historically followed a normal distribution, with an average of 250 cakes per month, and a standard deviation of 15 cakes.

    What is the probability that the sales for cakes will be no more than 285 over the next month?


Then can someone help me with this question also?

    What is the probability that the sales for the cakes will be no more than 230 cakes over the next month?

Top Answer

You are doing correct but if want to answer exact to your value (i.e. 0. 99018) for this two... View the full answer

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The probability that the sales will be no more than 285 in... View the full answer

2 comments
  • HI thank-you, but I put the equation in Excel and I got .99018. I'm still a little confused. But excellent explanation. I got the same answer
    • tjmax112
    • Jun 09, 2018 at 2:13pm
  • Putting in excel will give the value 0.990096924 which is approximately 0.9901.
    • rashi.bansal
    • Jun 09, 2018 at 2:15pm

(1) P (x  ≤  285) =... View the full answer

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Probability that the sales for the cakes will be no more than... View the full answer

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