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What is the alternative hypothesis for a null hypothesis stating that the average time a person keeps a cell phone is at most three years. Answer: Ha: mu > 3 State the null and alternative hypotheses for the following: You are investigating a complaint that "special delivery mail takes too much time" to be delivered.

• statistics -

Ho: Delivery time ≤ expectations
Ha: Delivery time > expectations

• statistics -

state the null and alternative hypothesis for the following: You are investigating a complaint that "special delivery mail takes to much time to be delivered

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