Standard Deviation Binomial Dist: n=50, p=0.3, Prob (x > 13 & 13 < x < 17)

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To find the standard deviation for a binomial distribution with n=50 and p=0.3, the formula used is √(n * p * (1 - p)), resulting in a standard deviation of approximately 3.87. The normal approximation can be applied to calculate probabilities for the specified ranges: for (a) P(x > 13) and (b) P(13 < x < 17). Using the normal distribution, these probabilities can be estimated using z-scores derived from the mean and standard deviation. The discussion emphasizes the importance of showing work to receive targeted assistance. The thread is categorized under homework due to the nature of the inquiries.
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find the standard deviation for the binomial distribution which has stated values of n=50 and p=0.3. use normal distribution to approximate the binomial distribution and find probability of (a) x> 13 and (b) 13<x 17.
 
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? Any reason why we should?

1) This looks like homework, not something you are just interested in.

2) Everything you ask here can be done by using simple formulas. What are they?

Show what you have done yourself so we will know where you need help.

I am moving this to the homework section.
 

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