Aresearcher wished to compare the effect of two stepping heights (low and high) on heart rate in a step-aerobics workout. a collection of 50 adult volunteers was randomly divided into two groups of 25 subjects each. group 1 did a standard step-aerobics workout at the low height. the mean heart rate at the end of the workout for the subjects in group 1 was a researcher wished to compare the effe = 90.00 beats per minute with a standard deviation of = 9 beats per minute. group 2 did the same workout but at the high step height. the mean heart rate at the end of the workout for the subjects in group 2 was = 95.08 beats per minute with a standard deviation of = 12 beats per minute. assume that two groups are independent and the data are approximately normal. let and represent the mean heart rates we would observe for the entire population represented by the volunteers, if all members of this population did the workout using the low or high step height, respectively. suppose the researcher had wished to test the hypotheses and . the p-value for the test is (use conservative value for the degrees of freedom)

between 0.05 and 0.01.

between 0.10 and 0.05.

larger than 0.10.

$27.5

step-by-step explanation:

$110.00 divided by 4

starting with:    

5 + x - 12 = 2x - 7   

5 + x - 12 - x = 2x - 7 - x (subtract x from both sides)   

5 - 12 = x - 7 (combine and cancel x's from both sides)   

5 - 12 + 7 = x - 7 + 7 (add 7 to both sides)   

0 = x (add numbers together on both sides)       

so in order for the equation to be true, x must be 0.   

trying x = -0.5   

5 + x - 12 = 2x - 7 (original equation)   

5 + -0.5 - 12 = 2(-0.5) - 7 (plug in value of x)   

5 + -0.5 - 12 = -1 - 7 (did multiplication)   

-7.5 = -8 (did addition on both sides)       

since -7.5 is obviously not equal to -8, the value of -0.5 for x is wrong.   

trying x = 0   

5 + x - 12 = 2x - 7 (original equation)   

5 + 0 - 12 = 2(0) - 7 (plug in value of x)   

5 + 0 - 12 = 0 - 7 (did multiplication)   

-7 = -7 (did addition on both sides)       

since -7 equals -7, that demonstrates that the value of 0 for x is correct.   

trying x = 1   

5 + x - 12 = 2x - 7 (original equation)   

5 + 1 - 12 = 2(1) - 7 (plug in value of x)   

5 + 1 - 12 = 2 - 7 (did multiplication)   

-6 = -5 (did addition on both sides)       

since -6 is obviously not equal to -5, the value of 1 for x is wrong.

fd

step-by-step explanation:

a

step-by-step explanation: