13.A cellphone salesperson claims that the average teen processes 3,700texts per month.A teacher believes this claim is high and randomly samples 30teens.What conclusion is reached if the sample mean is 3,490with a standard deviation of 1,120?

A.There is sufficient evidence to prove the salesperson's claim is true

B.There is sufficient evidence to prove the salesperson's claim is false

C.The teacher has sufficient evidence to reject the salesperson's claim

D.The teacher does not havesufficient evidence to reject the salesperson's claim

E.There are not sufficient data to reach any conclusion

14.When leaving for school on an overcast morning,you make a judgementon the null hypothesis.The weather will remain dry.What would the results be of Type I and Type II errors?

A.Type I error:needlessly carry around an umbrella

Type II error:get drenched

B.Type I error:carry an umbrella and it rains

Type II error:carry no umbrella and the weather remains dry

C.Type I error:get drenched

Type II error:carry no umbrella and the weather remains dry

D.Type I error:get drenched

Type II error:carry an umbrella and it rains

E.Type I error:get drenched

Type II error:needlessly carry around an umbrella

1. 15.Given an experiment withand a possible correct value of 32, which of the following will increase with an increase in the sample size n?
2. A.The probability of Type I error
3. B.The power of the test
4. C.The significance level
5. D.1 - power
6. E.The probabilityofType II error

16.Suppose in a small town with a single Walmart, it is known that customers spend an average of $75 per visit.A new Target is opening, and its sales manager believes that the new store is taking a higher mean amount per customer visit than Walmart.To test the Target manager's belief, which hypothesis should be used?

A.H₀:The mean amount spent at Target is equal to $75.

H_a:The meanamount spent at Target is less than $75.

B.H₀:The mean amount spent at Target is less than$75.

H_a:The meanamount spent at Target is greater than $75.

C.H₀:The mean amount spent at Target is equal to$75.

H_a:The meanamount spent at Target is greater than $75.

D.H₀:The mean amount spent at Walmart is equal to$75.

H_a:The meanamount spent at Walmart is greater than $75.

E.H₀:The mean amount spent at Walmart is equal to$75.

H_a:The meanamount spent at Walmart is less than $75.