Answer:
Step-by-step explanation:
A Chi-square test is used to test the test of independence between rows and columns, contingency tables. It is a test related to frequencies. The observed frequency is a given statistical frequency known as the actual frequency, the expected frequency is known as the theoretical frequency is derived from the study by using the sum total of the row and total in the column divided by their corresponding sample size.
8 times 3 = 24 +4= 28
4+3=7 times 8 =56
Answer: B. No
Step-by-step explanation:
Direct variation has the following form:
Where the constant of variation is "k".
By definition, in direct variation, when the variable "x" changes, tha variable "y" changes in proportion to the variable "x".
As you can observe in the table, when the value of the variable "x" increase, the values of the variable "y" decrease, therefore we can conclude that it is not a direct variation.
Then the answer is the option B.
Answer:
74/100 OR 37/50
Step-by-step explanation:
First add everyone together since its asking for no cold / everyone.
41 + 15 + 12 + 5 + 21 + 6 = 100
Then add to gether the total of people without a cold.
41 + 12 + 21 = 74
Next you just put the ratio in order which in this case would be no cold / everyone then if possible simplify.
74/100 = 37/50
Use PEMDAS (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction). Solve the problem in that order.
In this case, you would first solve the parentheses (6.3-4) to get 2.3. The problem is now 8.2+4.1(2.3). Next, multiply 4.1*2.3 to get 9.43. The problem is now 8.2+9.43. After adding, the only thing that remains is 17.63.
So, the answer is B 17.63.
Hope this helps! :)
