Historical data show that customers who download music from a popular Web service spend approximately ​$20 per​ month, with a standard deviation of ​$3. Assume the spending follows the normal probability distribution. Find the probability that a customer will spend at least ​$16 per month. How much​ (or more) do the top 6​% of customers​ spend?   What is the probability that a customer will spend at least ​$16 per​ month?   ​(Round to four decimal places as​ needed.)

Descriptive Statistics – Describe, in words, how you would calculate/estimate each of the following numbers from a data set: Mean Median Mode Standard deviation Variance

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Styles Editing Adobe Acrobat The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.4 days and a standard deviation of 2.1 days. What is the probability of spending more than 4 days in recovery?

In a normal distribution, a data value located 0.9 standard deviations below the mean has Standard Score: In a normal distribution, a data value located 2.1 standard deviations above the mean has Standard Score: In a normal distribution, the mean has Standard Score: z = Question Help: D Video Submit Question

7. Students that are accepted to Harvard University typically have an SAT score of 2100 or higher. In 2012, the average (i.e., mean) SAT score was 1490 with a standard deviation of 240. a) Convert the SAT score typically required to get into Harvard into a z-score. b) If an applicant's z-score for their SAT was 3.5, what would their raw SAT score be? c) IQ scores are standardized scores with an average of 100 and a standard deviation of 15. What IQ score is typically required to get into Harvard (hint: convert Harvard's SAT requirement into an IQ score) a) = b) =