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GuDViN [60]
3 years ago
13

Amanda earned a score of 940 on a national achievement test that was normally distributed. The mean test score was 850 with a st

andard deviation of 100. What proportion of students had a higher score than Amanda? Use your z table. Question 6 options: 0.10 0.32 0.18 0.82
Mathematics
1 answer:
snow_lady [41]3 years ago
4 0
<span>In math notation, we've done this: z = (X - μ) / σ = (940 - 850) / 100 = 0.90 where z is the z-score X is Vivian's score (940) µ is the mean (850) σ is the standard deviation (100) As you may know, in a normal distribution it's expected that about 68% of all observations will fall within 1 standard deviation of the mean, 95% will fall within 2 standard deviations, and 99% will fall within 3 standard deviations. 
940 lie before the first standard deviation, in which 16.5% is above it
since 940 is 0.9 from the mean and 0.1 from the first standard deviation
so above it is 17.5 % = 0.175 or about 0.18 </span>
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HI. Can you help???
Maslowich

Answer:

The maximum rate of change is between second 15 and second 19.

Step-by-step explanation:

See the attached table.

The table shows the total distance a spider traveled after a light was turned on.

Now, the average rate of change between two consecutive times in the table is given by  

= \frac{\textrm {Total change in Distance in feet}}{\textrm {Total change in Time in seconds }}

Therefore, between second 5 and second 11, the average rate of change = \frac{7 - 4}{11 - 5} = 0.5

Between second 11 and second 15, the average rate of change = \frac{13 - 7}{15 - 11} = 1.5

Between second 15 and second 19, the average rate of change = \frac{20 - 13}{19 - 15} = 1.75

Between second 19 and second 28, the average rate of change = \frac{24 - 20}{28 - 19} = 0.44

Therefore, the maximum rate of change is between second 15 and second 19. (Answer)

3 0
3 years ago
If John is driving 70 mi/hr and Jim is driving 50 ft/min, who is driving faster?
lapo4ka [179]

Answer:

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Step-by-step explanation:

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1 1/6 miles is significantly farther than 50 ft, so John is driving (much) faster.

3 0
3 years ago
on a coordinate grid wgat is the horizontal and the vertical line called... I just cant bother to look in my notes
ratelena [41]
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7 0
3 years ago
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miss Akunina [59]

Answer:

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2 years ago
Which is irrational?
sladkih [1.3K]

Answer:

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Step-by-step explanation:

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2 years ago
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