Z-test should be used when the parent standard deviation is known and the sample size is greater than or equal to 30 (to satisfy the Central Limit Theorem). A T-test should be used when these two rules do not apply.
Answer:
Step-by-step explanation:
<u>Unit rates are:</u>
- Brand A glue = $2.08/8 = $0.26 per oz
- Brand B glue = $1.62/6 = $0.27 per oz
Brand A glue is cheaper, so is the better buy
Answer:
one half of two fifths of x would be equivalent to one fifth of x
Answer:
its type hard to see ngl
Step-by-step explanation: