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Reil [10]
3 years ago
11

Heather and her lab partners were trying to find the probability that the weight of a US quarter is below one standard deviation

from the mean. They know that the weight of a quarter follows the normal distribution. What was their answer?
Mathematics
1 answer:
velikii [3]3 years ago
8 0

Answer:

16%

Step-by-step explanation:

The Empirical rule says that 68% of a normal distribution lies between -1 and +1 standard deviations.

That means that 32% lies outside of ±1 standard deviations.

Since the normal curve is symmetrical, that means 16% is less than -1 standard deviation and 16% is greater than +1 standard deviation.

So the answer is 16%.

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Riley has collected surveys for her final thesis project. One one question, 46.1% of respondents said that conditions were impro
ira [324]

Answer:

The maximum value of the confidence interval for this set of survey results is 51.73%.

Step-by-step explanation:

A confidence interval has two bounds, a lower bound and an upper bound.

These bounds depend on the sample proportion and on the margin of error.

The lower bound is the sample proportion subtracted by the margin of error.

The upper bound is the margin of error added to the sample proportion.

In this question:

Sample proportion: 46.1%

Margin of error: 5.63%.

Maximum value is the upper bound:

46.1+5.63 = 51.73

The maximum value of the confidence interval for this set of survey results is 51.73%.

5 0
4 years ago
Evaluate 8 - 4.7y - x, when y = -1 and x = 2.<br> A. -10.7<br> B. -9.7<br> C. 9.7<br> D. 10.7
seraphim [82]
It’s D, 10.7

8 - (4.7 x (-1)) - 2 = 10.7
5 0
4 years ago
Please help me with this math question
Volgvan
Ur answer is : h(d) = 2d + 3

because if u sub in the points in ur table, this equation works....with the number of months being d and the length of the hair being h(d)
8 0
4 years ago
Last year, 11 students tried out for the
umka2103 [35]
136% increase I think
5 0
3 years ago
NEED HELP! ASAP! 50 POINTS!
anastassius [24]

Answer:

D

You use algebra and solve it for y.

Step-by-step explanation:

4x-3y=18

3y=4x+18

y=4/3x +6

7 0
4 years ago
Read 2 more answers
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