Alberto has a mass of 52.2kg and then gains 2kg . frank has a mass of 48.8 and then loses 3kg . after their weight change what is albee and frank's mass

After their weight change Alberto's mass is 54.2 kg and Frank's mass is 45.8 kg

Step-by-step explanation:

step 1

Find Alberto's mass after the change

Adds the kilograms he gains to its original mass

52.2+2=54.2 kg

step 2

Find Frank's mass after the change

Subtract the kilograms he losses from its original mass

48.8-3=45.8 kg

therefore

After their weight change Alberto's mass is 54.2 kg and Frank's mass is 45.8 kg

b. remains unchanged

Step-by-step explanation:

Formula for standard error of mean is;

SE = σ/√n

From the above, we can see that the standard error of mean is independent of the confidence coefficient as it doesn't affect the SE.

Now, we are given that;

random sample; n = 100

Standard deviation; σ = 1

Thus;

SE = 1/√100

SE = 1/10

Now, even if the confidence coefficient is reduced, we can see that it has no impact on the standard error of mean.

Thus, SE remains unchanged.