Mathematics, 13.03.2020 11:44 barstr9146

A speed reading course claims that it can boost reading speeds to 1050 words per minute.
In a random sample of 49 people who took the course, the average was 1020 words per minute, with a standard deviation of 90 words per minute. What is the z-value rounded to the nearest hundredth? Is there enough evidence to reject the claim?

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A speed reading course claims that it can boost reading speeds to 1050 words per minute.
In a...