Answer:
Data Set C
Step-by-step explanation:
You can see that the data is best fit and better looking and fitting to the line in the data set C.
Answer:
The question would've given you to what number you should round up your answer.
Answer is:
Whole number:
63%
1 decimal place:
63.3%
2 decimal places:
63.33%
Exact number:
%
Step-by-step explanation:
So the starting no. = 30
Ending no. = 11
In order to evaluate the percentage of decrease we:
(Ending number/starting number) * 100
So:
%
To find the Decrease percentage:
100 % - 110/3 %
= 63.333%
Answer:
y = 7.8x + 26
Step-by-step explanation:
Given the following :
Pearson's r = 0.78
Average consumption of ice cream = 5 grams per week (m) with Standard deviation (sd) = 1.5 grams
Average weight = 65 kg with standard deviation of 15kg
Formular for the regression line :
General regression formula :
y = mx + c
y = predicted variable ; m = slope or gradient ; x = predictor variable ; c = intercept
Gradient (m) = change in y / change in x
m = (sd y / sd x) * r
m = (sd weight / sd ice cream) × r
m = (15 / 1.5) × r
m = 10 × 0.78 = 7.8
Intercept:
mean of weight(y) - [Slope×mean of icecream(x)]
65 - [7.8 × 5]
65 - 39 = 26
Hence,
y = 7.8x + 26
