Determine whether the value is a discrete random variable, continuous random variable, or not a random variable. a. The number of hits to a website in a day

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A: According our policy we can answer only first three subpart for remaining please repost the question...

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Q: 1. Let Z be a random variable with a standard normal distribution. Calculate: P(Z ≤− 2.28 or Z ≥ 0....

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A: A random variable X~U(2.76 , 5.4)f(x)=15.4-2.76f(x)=12.64  ;  2.76&lt;X&lt;5.4

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Q: compute for the mean, variance and standard deviation.

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A: We have given that.   X~N( μ , ?^2 )   μ =13 , ? =9 , n=40   Z-score =( x - μ )/?  

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Q: 8. P(-0.9 <Z < 0.19)

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A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have ...