Agroup of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week. assuming a population standard deviation of six hours, what is the required sample size if the error should be less than a half hour with a 95% level of confidence?

Sample size should be atleast 55320

Step-by-step explanation:

Given that a  group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week.

population standard deviation

Std error =

Margin of error for 95%

=

Since sample size is number of items it cannot be indecimal.

So we can round off to the next high integer on a safer side.

18.8 cubic inches.

step-by-step explanation:

volume of a cone = πr²h

r = 1.5 inches

h = 8 inches

pi = 3.14

volume of our cone = × 3.14 × 1.5² × 8 = 18.84 square inches

or equals to 18.8 square inches rounded up to nearest tenth.