3. Tell which measure of central tendency best describes the data.
Weights of books (oz):
12, 10, 9, 15, 16, 10

A) Mean
B) Median
C) Mode

4. Find the value of x such that the data set has the given mean.
99, 86, 76, 95, x; mean 91

A) x = 91
B) x = 87
C) x = 82
D) x = 99

Question

3. Tell which measure of central tendency best describes the data.
Weights of books (oz):
12, 10, 9, 15, 16, 10

A) Mean
B) Median
C) Mode

4. Find the value of x such that the data set has the given mean.
99, 86, 76, 95, x; mean 91

A) x = 91
B) x = 87
C) x = 82
D) x = 99

anonymous · Answer

second one i can do

anonymous · Answer

the mean is 91 and you have 5 numbers (including $x$\) so you have to solve $$\frac{99+86+76+95+x}{5}=91$$ 
add up top first, what do you get ?

anonymous · Answer

356x/5

anonymous · Answer

i hope you mean $$\frac{356+x}{5}$$ right?

anonymous · Answer

Yes

anonymous · Answer

so if $$\frac{356+x}{5}=91$$ then $$365+x=91\times 5$$

anonymous · Answer

whatever that is
then $$x=91\times 5-356$$

anonymous · Answer

i get $99$ http://www.wolframalpha.com/input/?i=91*5-356

anonymous · Answer

btw pretty sure the first one is the mean, not the median or mode

anonymous · Answer

@satellite73 Thanks, could you help me with a few more?

anonymous · Answer

lol go ahead and post, i will look at them
statistics is not really my forte though

anonymous · Answer

best to post in a new box to eliminate all the scrolling down
also maybe you will get someone who knows what they are doing