Mathematics, 22.04.2020 23:40 Nobleufia
Suppose x has a distribution with a mean of 50 and a standard deviation of 20. Random samples of size n = 64 are drawn. (a) Describe the x distribution and compute the mean and standard deviation of the distribution. x has a normal distribution with mean = and standard deviation or = (b) Find the z value corresponding to x = 55. (c) Find P(x < 55). (Round your answer to four decimal places.) P(x < 55) = (d) Would it be unusual for a random sample of size 64 from the x distribution to have a sample mean less than 55? Explain. No, it would not be unusual because more than 5% of all such samples have means less than 55. Yes, it would be unusual because less than 5% of all such samples have means less than 55. • No, it would not be unusual because less than 5% of all such samples have means less than 55. Yes, it would be unusual because more than 5% of all such samples have means less than 55.
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(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.
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Your friend swims on the school team. in his first four races, his times are 24.7, 23.5, 25.6, and 27.2 seconds. which time listed for his next race would make the range larger?
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Mathematics, 21.06.2019 19:10
At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?
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Suppose x has a distribution with a mean of 50 and a standard deviation of 20. Random samples of siz...
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