95% confidence intervals based on the t-distribution are generally WIDER than confidence intervals based on the Z-distribution (if everything else stays the same.)

Group of answer choices:

True

False

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You want a 95% confidence interval for average pizza delivery time. A sample of 10 pizzas has an average delivery time of 34 minutes and a SAMPLE STANDARD DEVIATION of 5.2 minutes. What t value do you use in your formula for the confidence interval?

Group of answer choices:

None of these choices is correct.

1.96

2.262

2.228

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Bob's pizza claims the average pizza delivery time is 30 min and you believe it's longer. You sample 10 pizzas and find an average delivery time of 34 minutes, and a SAMPLE STANDARD DEVIATION of 5.2 minutes. What is the range for the p-value?

Group of answer choices:

between .05 and .025

between .025 and .01

None of these choices is correct.

.0057 exactly