Amanufacturer of college textbooks is interested in estimating the strength of the bindings produced by a particular binding machine. strength can be measured by recording the force required to pull the pages from the binding. if this force is measured in pounds, how many books should be tested to estimate with 98% confidence to within 0.1 lb, the average force required to break the binding? assume that σ is known to be 0.6 lb. (use the value of z rounded to two decimal places.)

196

Step-by-step explanation:

As per given , we have

Population standard deviation:

Significance level :

Using the z-value table , the critical z value for 98% confidence :

Margin of error : E= 01 lb

Sample size :

Simplify , we get

Hence, the minimum sample size required for books = 196

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

if you explain the the question more correctly i might be able to answer this better

step-by-step explanation: