Yes x = 1 is a function.
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Complete Question
The complete question is shown on the first uploaded image
Answer:
Value x of X -3 -7 -15
Step-by-step explanation:
From the question we are told that
The values of X are
The total number of outcomes is n = 8
The probability distribution function of X is evaluated as follow
Where is the number of time X = -3 occurred and from the table the value is
Therefore
Now
Where from table
So
Also
Answer: 500 tiles
Explanation:
20cm = 0.2m
Find the area of the floor:
Area = 5 x 20 = 100m
Find how many tiles are needed:
Let x be the number of tiles needed
(0.2)(x) = 100
x = 100/0.2
x = 500
Answer:
0.2 ; 100 ; 4.84
Step-by-step explanation:
Given that the probability of each of the 5 groups is the same :
Sum of probability = 1
Hence, Probability of each group = 1 / number of groups = 1 / 5 = 0.2
Expected number for each interval for a sample of 500 : ; X = 500
E(X) = X * P(x) = 500 * 0.2 = 100
Goodness of fit (X²) :
X² = Σ(X - E)² ÷ E
Groups :
113, 95, 108, 99, and 85
X : 113 ____ 95 ____ 108 ____ 99 _____ 85
(113 - 100)^2 / 100 = 1.69
(95 - 100)^2 / 100 = 0.25
(108 - 100)^2 / 100 = 0.64
(99 - 100)^2 / 100 = 0.01
(85 - 100)^2 / 100 = 2.25
(1.69 + 0.25 + 0.64 + 0.01 + 2.25) = 4.84
The slope of the line is -1/2