A consumer information website claims that the average price of all routers is $80. If we assume that the population standard de
1 answer:
Answer: 0.031
Step-by-step explanation:
As considering the given information, we have
n= 75
Let x be the random variable that represents the price of all routers.
We assume that the price of all routers are normally distributed.
Z-score corresponding to x=74 will be :-
Using z-value table,
P-value = P(x ≤ -1.86)=1-P(x≤ 1.86)=1-0.9685572=0.0314428≈0.031
Hence, the required probability = 0.031
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The linear equation B. y = -x +7.5 best describes the given model. The mood rating for a student that spent 5.5 hours online would be 2.
Step-by-step explanation:
Step 1; We plot the points that fall on the line and that lie on an exact x or y coordinate. The following 4 points are plotted (0.5, 7), (2, 5.5), (2.5, 5) and (3.5, 4). We substitute the values of x in the given equations to see which best describes the model.
Step 2; When y = x + 7.5, we get the coordinates as (0.5, 8), (2, 9.5), (2.5, 10) and (3.5, 11).
When y = -x + 7.5, the coordinates are (0.5, 7), (2, 5.5), (2.5, 5) and (3.5, 4).
When y = + 7.5, the coordinates are (0.5, 7.25), (2, 6.5), (2.5, 6.25) and (3.5, 5.75).
So equation 2 has the closest values to the actaul graph.
Step 3; By substituting x = 5.5, y = -(5.5) + 7.5 = 7.5 - 5.5 = 2.