Answer:
The correct statements regarding correlation coefficient are:
1. Its absolute value cannot exceed 1.
2. A positive value indicates a strong correlation between the two variables; a negative value indicates a weak correlation between the two variables.
3. If X and Y have positive correlation coefficient, when we run a regression analysis Y=a+bX+e, we will find b positive.
4. If X and Y have positive correlation coefficient, when we run a regression analysis Y=a+bX+e, we will find a positive.
Step-by-step explanation:
Correlation measures the strength of the relationship which exists between X and Y variables. Regression, on the other hand, helps to establish a cause and effect between a dependent variable and an independent variable.
Answer:
12
Step-by-step explanation:
you can pack one pack in 20 min
there are three 20 min in one hour
multiply three times the four hours and you get 12
Answer:
200 times.
Step-by-step explanation:
The probability of getting a number less than 6 ( that is 1 2 3 4 or 5) = 5/8.
So if you spin 32o times the expected number obtained = 5/8 * 320
= 5 * 40
= 200.
Answer:
1.62,15/20,16.2%
Step-by-step explanation:
Answer:10m/s
Step-by-step explanation: