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A random sample of n = 100 elementary school students were asked how many summer camps...

A random sample of n = 100 elementary school students were asked how many summer camps they have been in a certain year. This sample yielded a mean of 3.2 and a standard deviation of 1.6. How many standard errors from the null hypothesis value of 3 is the sample mean of 3.2?

2.33

1.25

2.58

1.69

math   Statistics-And-Probability   
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