There were 324 adults surveyed. among the participants, the mean number of hours of sleep each night was 7.5 and the standard deviation was 1.6. the margin of error, assuming a 95% confidence level, is approximately . round to the nearest hundredth

Answer with explanation:

Total Population Being Surveyed = 324

Mean of the Population = 7.5

Standard Deviation =1.6

Margin of Error is given by the formula

Marginal of Error = 0.17 (approx)  

Mean =7.5

Confidence Interval for a population when Z score at 95% is calculated  =Mean margin of error

    =that is between ,7.50 +0.17 to ,7.50 -0.17

  =Between ,7.33 to 7.67

pooopoopopoopop

step-by-step explanati∵∵∴∴on:

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you