A researcher recruited 40 adults between the ages of 40 and 80 and tested their ability to remember a list of words. For each participant, the researcher counted the number of words correctly recalled and recorded their age (in years). HYPOTHESIS
The research hypothesis is that age is negatively related to memory performance.
This hypothesis is: directional/non-directional
RESULTS
Suppose the researcher calculated a correlation of r = -0.24 between age and memory performance.
APA style: (r(48)= -0.24, p<0.05)
CONCLUSION
This result is/is not statistically significant
We fail to reject/reject the null hypothesis that there is no relationship between (predictor): age/memory performance and (outcome): age/memory performance (r(53)=0.395, p<0.01). As age increases,: memory performance decresases/so does memory performance

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.