Suppose a consultant claims a training course will increase typing speed by at least 10 words per minute. A manager enrolls 15 employees and notes an increase of only 7 words per minute with a standard deviation 2.5.

1. What are the appropriate null and alternative hypotheses? Explain.

I have asked this question before and believe...

null: < 10

alternate: 10

Is this true? If not, can you please explain the fault in my logic? Since the claim is an increase by at least 10 words per minute I thought that meant 10. However, previous answers stated the alternate as < 10.