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A sample of size 20 yields a sample mean of 23.5 and a sample standard deviation of 4.3. Test HO: Mean 25 at = 0.10.HA:

A sample of size 20 yields a sample mean of 23.5 and a sample standard deviation of 4.3.

Test HO: Mean 25 at = 0.10.HA: Mean< 25. This is a one-tailed test with lower reject region bounded by a negative critical value

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