On an international exam, students are asked to respond to a variety of background questions. For the 41 nations that participated in the exam, the correlation between the percentage of items answered in the background questionnaire (used as a proxy for student task persistence) and mean score on the exam was 0.793. Does this suggest there is a linear relation between student task persistence and achievement score? Write a sentence that explains what this result might mean.
Answer:
There is a strong positive relationship between student task persistence and achievement score
Step-by-step explanation:
The correlation Coefficient score is used to as a numerical measure to show the strength of relationship or correlation between two linear variables. The correlation score ranges from - 1 to + 1. With positive values depicting a positive relationship and negative values exhibiting a negative relationship between the two variables. The closer the value is to 1 or - 1, the stronger the level of correlation. A correlation value of 0, means no relationship exists between the variables.
The correlation score of 0. 793 is both positive and close to 1. Hence, signifying a strong positive relationship.
A - 5.1 = 1.7
a - 5.1 + 5.1 = 1.7 + 5.1
a = 6.8
-31 = z + (-17)
-31 + 17 = z + (-17) + 17
-14 = z
Answer:
7.87 years
Step-by-step explanation:
#First we determine the effective annual rate based on the 9% compounded semi annual;
#We then use this effective rate in the compound interest formula to solve for n. Given that the principal doubles after 2 yrs:
Hence, it takes 7.87 years for the principal amount to double.
Answer:
1
Step-by-step explanation:1
Basically you are working on percentages.
<span>Your entire group is 252 people </span>
<span>25/175 = 0.1428 OR ~14.28% like disc golf. </span>
<span>252*0.1428 = 36 people like disc golf. </span>
<span>of these 36 "players" or likers of disc golf, 5/12 of them have their own disc. </span>
<span>You can get the fraction 5/12 into decimal form (0.416 or 41.6%) </span>
<span>36*0.416 = 15 people have their own disc. </span>
<span>What you are doing is changing these fractions to percents and multiplying the percent to whatever group to see how many people in the group like this sport or have a disc. </span>
<span>Another way is to use equal fractions. If 25 / 175 like disc golf then x / 252 like disc golf. Multiply by 252 on both sides so x= (252*25) / 175. x=36. Likewise, 5 / 12 = x / 36 you can see the denominator 36 is 3*12, so you can say the numerator is 3*5, or 15. or multiply by 36 on both sides so (36*5)/12 = 15.</span>