A simple random sample of 43 elements has been selected from a population of size 800 . The sample ...

A simple random sample of 43 elements has been selected from a population of size 800 . The sample mean is 500, and the sample standard deviation is 60 . An approximate 95 confidence interval for the population total is _____.
 a. 482 to 517
  b. 385,759 to 414,241
  c. 400,000 to 500,000
  d. 350,000 to 450,000

Q. 2

The units for the standard deviation are the same as the units for the original data (for example, feet, inches, etc.).
  Indicate whether the statement is true or false

Q. 3

A simple random sample of 43 elements has been selected from a population of size 800 . The sample mean is 500, and the sample standard deviation is 60 . The population total is _____.
 a. 34,400
  b. 21,500
  c. 400,000
  d. 500,000

Q. 4

The units for the variance are the same as the units for the original data (for example, feet, inches, etc.).
  Indicate whether the statement is true or false