28. What three things must you know about a distribution to find the probability of sums? 29. An unknown distribution has a mean of 25 and a standard deviation of six. Let X = one object from this distribution. What is the sample size if the standard deviation of EX is 42? 30.An unknown distribution has a mean of 19 and a standard deviation of 20. Let X = the object of interest. What is the sample size if the mean of EX is 15,200?

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28,29,30 please

Unknown distribution hasa
sample size of 25 is taken. Let X= the object of
22. What is the mean of EX? =300
23. What is the standard deviation of EX? =5
24. What is P(Ex= 290)? =0
%3D
25. What is P(Ex> 290)?
26. True or False: only the sums of normal distributions are also normal distributions.TRue
27. In order for the sums of a distribution to approach a normal distribution, what must be true?
28. What three things must you know about a distribution to find the probability of sums?
29. An unknown distribution has a mean of 25 and a standard deviation of six. Let X = one
object from this distribution. What is the sample size if the standard deviation of EX is 42?
30.An unknown distribution has a mean of 19 and a standard deviation of 20. Let X = the object
of interest. What is the sample size if the mean of EX is 15,200?
Transcribed Image Text:Unknown distribution hasa sample size of 25 is taken. Let X= the object of 22. What is the mean of EX? =300 23. What is the standard deviation of EX? =5 24. What is P(Ex= 290)? =0 %3D 25. What is P(Ex> 290)? 26. True or False: only the sums of normal distributions are also normal distributions.TRue 27. In order for the sums of a distribution to approach a normal distribution, what must be true? 28. What three things must you know about a distribution to find the probability of sums? 29. An unknown distribution has a mean of 25 and a standard deviation of six. Let X = one object from this distribution. What is the sample size if the standard deviation of EX is 42? 30.An unknown distribution has a mean of 19 and a standard deviation of 20. Let X = the object of interest. What is the sample size if the mean of EX is 15,200?
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