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mario62 [17]
2 years ago
7

Sally took her stats test last week and scored a 45%. The class average was 55%with a standard deviation of 4.5. How many standa

rd deviations below the mean did Sally score? (Hint: z-score
)A) 3.33 SD above the mean
B) 2.22 SD below the mean
C) 2.22 SD above the mean
D) 3.33 SD below the mean
Mathematics
1 answer:
sesenic [268]2 years ago
5 0

Answer: A

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago
Jacob went camping with his family. At 7:15 A.M., Jacob set out to go fishing. It took 1 hour and 45 minutes to hike to the lake
GREYUIT [131]

Answer:

  1. 7:15 A.M.
  2. 1 hour and 45 min = 105 min
  3. 3 hour 45 min= 225 min
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3 years ago
If the discriminant of a quadratic equation is equal to -8, which statement describes the roots?
tia_tia [17]

Answer:

There are two complex roots.

Step-by-step explanation:

When the discriminant is a negative number, the parabola will not intersect the x-axis. This means that there are no solutions/two complex solutions.

4 0
3 years ago
Help will give crown
Lunna [17]

Answer:

x              y

2              9

3              7

4              5

5              3

Step-by-step explanation:

6 0
3 years ago
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This one twelve less one fourth of a number
kolezko [41]

Answer:

True

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1/4 is greater than 1/12

Hope this helps

6 0
2 years ago
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