A critical value is the point on the scale of the
test statistic (z test in this case) outside which we reject the null
hypothesis, and is taken from the level of significance of the test. The critical
values can be obtained from the standard distribution tables for z and for this
case, it is equivalent to:
critical value zα/2 at 98% confidence level = 2.326
a cone would be formed due to the point on the graph forming a triangle, and when a triangle is spun around an axis on one of its sides it will form a cone
If a car travels 45 miles and uses 3 gallons of gas than to find how many miles can be traveled using 1 gallon, you do 45/3, miles/gallons to get 15 miles/1 gallon.
