A researcher is interested in the whether the number of times each week people exercise differs between Canadians and British people. To test this, she asks 1000 people (500 Canadians and 500 British) how often they exercise a week. Given the preceding experimental description, what is the most appropriate statistical test to use? a. a correlation b. a t-test c. a Chi Squared d. an ANOVA

t-test

Step-by-step explanation:

t-test is used to determine if their is a significant difference between averages or means of two groups or data set. There are three types of t-test;

Independent sample t-test which compares the means for two group; paired sample t-test which compares at the different times the means from the same data set or group and finally one sample t-test which compares a single group against a known mean. It involves the forming of null hypothesis; the two mean are the same or equal and after several calculations to get some important values, the values are compared with standard values and the null hypothesis is either accepted or rejected.

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.