Domino's charges $10.99 for a large pizza.Nia just realized that she has three coupons for large cheese pizzas.each coupon is fo
r $2 off. She is hosting a big party so she needs lots of pizzas.If she has $60 to spend how many pizzas can she buy all together?
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Answer:
atleast 385
Step-by-step explanation:
Given that an electrical power company is looking to expand into a new market. Before they commit to supplying the new area with electricity, they would like know the mean daily power usage for homes there.
Population std deviation =
Sample size =
STd error of sample mean =
Margin of error for 95% would be Critical value ( std error)
Here since population std dev is known we can use Z critical value= 1.96
Sample size should be atleast 385