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larisa86 [58]
2 years ago
6

In developing an interval estimate of the population mean, if the population standard deviation is unknown _____.

Mathematics
1 answer:
Liula [17]2 years ago
7 0

Answer:

the sample standard deviation and t distribution can be used

Step-by-step explanation:

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Find the intersection and union for L={-1,1,2} I={-1,3,7}
Zanzabum
Intersection means elements both have. Both sets have -1 but they have nothing else in common so the intersection is {-1}
Union means combining the sets so {-1, 1, 2, 3, 7} Note that I only wrote 1 twice. No duplicates allowed!
7 0
3 years ago
Kevin can travel 221/2 miles in 1/3 hour.what is his average speed in miles per hour
natta225 [31]
<span>Average speed = distance over time so here
Speed = (22 1/2) / (1/3) = 67 1/2 miles per hour</span>
8 0
3 years ago
Read 2 more answers
3
kari74 [83]

The equations to represent the relationship are ƒx3/5=4 4/5 and 4 4/5 divided 3/5 =f

<h3>Ratio and proportion</h3>

Fractions are written as a ratio of two integers. For instance a/b is a fraction.

If Anastacio distributed 4 4/5 kg of seed among several bird feeders and put 3/5 kg of seed in each feeder, the expression that represents the number of bird feeders that Anastacio filled is given as;

Number of bird feeder = 4 4/5 ÷ 3/5

f = 4 4/5 ÷ 3/5

Multiply both sides by

f * 3/5 = 4 4/5   ÷ 3/5 * 3/5

f * 3/5 = 4 4/5

Hence the equations to represent the relationship are ƒx3/5=4 4/5 and 4 4/5 divided 3/5 =f

Learn more on division of fraction here: brainly.com/question/407943

#SPJ1

3 0
1 year ago
Measuring and arcs.
n200080 [17]

Answer:

Hope this helps

Step-by-step explanation:

3. Minor arc, 44°

4. Major arc, 140°

5. Minor arc, 44°

6. Major arc, 316°

7. Semi circle, 180°

8. Major arc, 140°

9. 38°

10. 52°

11. 142°

12. 128°

13. 232°

14. 308°

7 0
3 years ago
A hiker in Africa discovers a skull that contains 63% of its original amount of C-14.
tester [92]

Answer:

3820 years

Step-by-step explanation:

The age of the skull can be found using carbon-14 by applying the half-life relationship.

Age of skull is given by;

t=(\frac{In\frac{N}{N0} }{-0.693} )*5730

where N=63 N₀=100 -0.693=decay factor of carbon and 5730 =half-life of carbon-14, t =age

substitute values in equation

t=(\frac{In\frac{63}{100} }{-0.693} )*5730\\\\\\t=(\frac{In0.63}{-0.693} )*5730\\\\\\t=(\frac{ -0.4620}{-0.693} )*5730\\\\\\t=(0.6667)*5730\\\\\\t=3820.29\\\\\\t=3820years

4 0
4 years ago
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