Question 202975
Determining null and alternative hypotheses 
A toy manufacturer claims that the mean time that its top-selling toy captures children's attention is at least 45 minutes. Suppose that we doubt this claim and we carry out a hypothesis test to see if we can refute the claim. State the null hypothesis Ho and the alternative hypothesis H1 that we would use for this test. 
Ho :u >= 45 min___ 
H1 :u < 45 min___

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Comment: Keep in mind that "equality" must always appear in Ho.
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Cheers,
Stan H.