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makkiz [27]
3 years ago
10

In numerical expression [(25-11) (15-9)divided by 5

Mathematics
1 answer:
Anettt [7]3 years ago
4 0
=14*6/5
=84/5
use the bodmas rule
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42 percent of 120 is what
Sedbober [7]
It's 120*0.42 = 50.4 so 50.4 is the answer
5 0
3 years ago
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You measure 25 turtles' weights, and find they have a mean weight of 31 ounces. Assume the population standard deviation is 12.8
Firlakuza [10]

Answer:

Margin of error = 4.21 ounces  

Step-by-step explanation:

According to the Question,

  • Given That, You measure 25 turtles' weights, and find they have a mean weight of 31 ounces. Assume the population standard deviation is 12.8 ounces

Therefore, Sample mean = 31 ounces  ,  Sample size(n) = 25 , Alpha(α) = 0.10 & Population standard deviation(σ) = 12.8 ounces

  • Thus, Margin of error  = Z_{critical} × σ / √n  (Z_{critical} at α=.010 is 1.645)

Putting The Values, We get

1.645 × (12.8 / √25 ) ⇒ 4.2112 ≈ 4.21

Thus, the maximum margin of error associated with a 90% confidence interval for the true population mean turtle weight is 4.21 ounces

8 0
3 years ago
Give at least four different symbols that have been used to represent specific statistical measures. Describe what measure each
natta225 [31]

Answer:

Variance                    0²

standard deviation   0×

mean                          α

median                      x-bar

Step-by-step explanation:

these are the four different symbols that have been used to represent specific statistical measures like for example, mean which is used to calculate the average value of a sample or population. Variance is the what is expected from the squared standard deviation of a random variable from is average vale/ mean. Median is the value that lies in the middle in a random sample and lastly the standard deviation is the square root of the variance and it measures how the values of sample are spread or how far are they from the mean. these are also commonly use in excel a lot to calculate and evaluate data.

6 0
3 years ago
In a history class, the girl to boy ratio is 5 to 3. If there are 80 students total, how many boys are there?​
Brilliant_brown [7]
80x3/8=10 common factor. 10x5. And 10x3


50/30

30 boys

50 girls
8 0
2 years ago
Solve for qqq.
Anna11 [10]
3/5=q/10
multiply both sides by 5 or cross multiply i fyou like
30/5=10q/10
6=1q
6=q

8 0
3 years ago
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