9514 1404 393
Answer:
(b) 38.5
Step-by-step explanation:
The polygon is a trapezoid with bases 4 and 7 and height 7. Its area is given by the formula ...
A = (1/2)(b1 +b2)h
A = (1/2)(4 +7)(7) = 77/2
A = 38.5 . . . . square units
The scatter plot shows the first-year income for 15 people, based on the number of years of school they each had after high scho
ol. A line of best fit
was drawn through the data. The equation for the line is y = 8x + 15.
Which statement describes the meaning of the y-intercept for the line of best fit?
was drawn through the data. The equation for the line is y = 8x + 15.
Which statement describes the meaning of the y-intercept for the line of best fit?
2 answers:
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On Monday the rover needed to charge 22 times and on Tuesday 12 times.
So the answer is 22-12=10
On Monday the rover needed to charge 22 times and on Tuesday 12 times.
So the answer is 22-12=10
Answer:
p value = 0.0174
Conclusion : we reject the null hypothesis
Step-by-step explanation:
Thinking step:
We need to perform a test to determine if the proportion of the good parts is the same for all three shifts at a significance level of
Assumption : all the population for each or the three shifts is not equal.
Calculation:
Let p₁ be the sample of the first shift
p₂ be the sample of the second shift
p₃ be the sample of the third shift
According to the null hypothesis
H₀ = p₁ = p₂ = p₃
In other words, all the population sample proportions are equal.
Alternatively, we can assume that the three shift are not equal p₁ ≠ p₂ ≠ p₃
Tabulating and performing the ² test gives 8.10
degrees of freedom:
df = k - 1
= 3 - 1 = 2
Thus the degree of freedom is 2
Solving using the MINITAB software gives: p = 0.174
The solution shows that the p value < level of significance, then p-value lies in the range 0.0174≤≤0.05
Therefore, we reject the null hypothesis based on the fact that the three shifts are not equal.