The main number of words per minute read by six graders is 85 with a standard deviation of 22. If 128 six graders are randomly selected, what is the probability that the sample mean would be greater than 86.1 WPM?
Added by Jessica K.
Step 1
- The population mean (μ) is 85 words per minute (WPM). - The population standard deviation (σ) is 22 WPM. - The sample size (n) is 128 six graders. Show more…
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