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NemiM [27]
3 years ago
10

Help. Math is the worstttt

Mathematics
1 answer:
Vlada [557]3 years ago
4 0

Answer:

I agree, also i think the answer is 15 :)

Step-by-step explanation:

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Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.
Vinvika [58]

Answer:

The point estimate for population mean is 8.129 Mpa.

Step-by-step explanation:

We are given the following in the question:

Data on flexural strength(MPa) for concrete beams of a certain type:

11.8, 7.7, 6.5, 6.8, 9.7, 6.8, 7.3, 7.9, 9.7, 8.7, 8.1, 8.5, 6.3, 7.0, 7.3, 7.4, 5.3, 9.0, 8.1, 11.3, 6.3, 7.2, 7.7, 7.8, 11.6, 10.7, 7.0

a) Point estimate of the mean value of strength for the conceptual population of all beams manufactured

We use the sample mean, \bar{x} as the point estimate for population mean.

Formula:

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

\bar{x} = \dfrac{\sum x_i}{n} = \dfrac{219.5}{27} = 8.129

Thus, the point estimate for population mean is 8.129 Mpa.

4 0
2 years ago
14. A boy completes a 100 m circular track race in 5 min. Another boy runs in the same
Aleksandr [31]

Answer:

ee

Step-by-step explanation:

5 0
3 years ago
Which is the best estimate for the mass of a pair of eyeglasses? A. 25 grams B. 250 grams C. 25 kilograms D. 250 kilograms
Yuliya22 [10]
About A. 25 grams because glasses are really not heavy at all and the other options are way too illogical.
Hope this helps!
4 0
3 years ago
Paloma has 3 jackets, 6 scarves, and 4 hats. What is the number of different outfits consisting of a jacket, a scarf, and a hat
Charra [1.4K]

Answer:

72

Step-by-step explanation:

We need to multiply all of them because there are 3 choices for jackets, 6 for scarves and so on.

5 0
1 year ago
In the slope-intercept equation of a line, which quantity is given by the coefficient of the x-term? A. The y-intercept of the l
-Dominant- [34]
In any linear equation the coefficient of the x-term represents ALWAYS the slope.

So it is   B. The slope of the line
7 0
3 years ago
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