the square root is 8.246211251
Answera and Step-by-step explanation: Correlation Coefficient is the measure of how strong two variables are. There are numerous types of correlation coefficients and the product moment correlation coefficient, also known as <em>Pearson's correlation</em> or <em>Pearson's R</em> is most commonly used in linear regression. The formula to calculate it is:
r = n(∑xy) - (∑x)(∑y) / √[∑x² - (∑x)²].[n∑y² - (∑y)²]
To find the value of R:
1) Separate the values of X and Y and out them in 2 columns.
2) Add 3 more columns: for xy, x² and y²;
3) Find the values of each column;
4) Add each column;
5) Put the sum of each column in its place on the formula above;
6) Find the correlation.
i) For this question, r = 0.9645. As it's <u>positive</u>, means that the two variables are directly linked, i.e., an increase in one variable will produce an increase in the other variable in the same proportion.
ii) The Senator should distribute Norvasc to the old adults groups, because, as the <u>population grows</u>, the death associated with high blood pressure will <u>also grow</u>, as explained by the correlation coefficient.
Answer: $5.1
Step-by-step explanation:
From the question, we are informed that thee price of the skateboard is $85 and that the sales tax is 6%.
To calculate the sales tax for the skateboard in dollars in cents, we find 6% of$85. This will be:
= 6% of $85
= 6% × $85
= 6/100 × $85
= 0.06 × $85
= $5.1
= 5 dollar, 10 cents
<h3>The length in standard notation is 0.05 meter</h3>
<em><u>Solution:</u></em>
Given that,
Jeremy measured the length of an ant as 
We have to write the length in standard notation
From given,
Thus the length in standard notation is 0.05 meter
<em><u>Method 2:</u></em>
Use the exponent of 10 to determine how many places to move the decimal point
Since exponent is -2, is negative
Thus, we have to move the decimal point to right 2 places
Thus the length in standard notation is 0.05 meter
