A random sample of 12 students used Method A, and their increase in points averaged 46.31, with a sample standard deviation of 6.44. Another random sample of 10 students used Method B, and their increase averaged 42.79 points, with a sample standard deviation of 7.52. Use the 95% degree of confidence all througH0ut. An appropriate set of null and alternative hypothesis to determine whether Method A increases students points by more than 3 points is:

The null hypothesis is  

The alternative hypothesis is    

Step-by-step explanation:

From the question we are told that

  The mean of method A is

  The standard deviation of method A is  

   The  mean of method B is  

   The standard deviation of  method B  is  

An appropriate set of null and alternative hypothesis to determine whether Method A increases students points by more than 3 points is

The null hypothesis is  

The alternative hypothesis is    

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$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.