Asample of 25 seniors from a large urban school district has a mean verbal sat score of 450. assume we know that the standard deviation of the population of verbal sat scores for seniors in the district is s=100. a 90% confidence interval for the mean score µ for the population of seniors is used. which of the following will produce a confidence interval with a smaller margin of error?

using a confidence interval of 95%
using a sample of 100
using an upper critical value of 99%
using a sample of 15 seniors
using any sample size smaller than 25

given data:

determine the horse power (h.p) = ?

force applied to move the box(f) = 10 pounds,

box lifted from a distance         (d) = 3 feet

time taken to lift                         (t) = 10 sec,

the horse power is defined as amount of work required to move a load. the horse power is equal to 550 foot-pound per second

                  1 h.p   = 550 foot-pound/second

it can also be defined as the the load that need to be move a body for certain distance in a certain amount of time.

mathematically,

                      h.p = (force × distance)/ time

                            = (10 × 3)/ 10

                            = 30/10

                            = 3 foot -pound/sec

hence, the horse power is needed to move the box is 3 foot-pound/second

important note: 1 h.p = 550 foot-pound/second = 746 watts

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this