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earnstyle [38]
3 years ago
9

Round 81,294 to the nearest ten

Mathematics
1 answer:
marin [14]3 years ago
6 0
81,294 rounded to the nearest tenth is 81,290. Hope this helps!
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Identify the type of sampling method used.A trucking company places their office phone number on the back of all of their vehicl
ziro4ka [17]

Explanation

In this sample, people elect to participate or self-select to do the survey. Often, these folks have a strong interest in the main topic of the survey.

In essence, they volunteer to inform the trucking company about the activities of their drivers. That makes this a voluntary sample.

Answer: Voluntary Sampling Method

7 0
2 years ago
A shipment of 12 microwave ovens contains 3 defective units. A vending company has ordered 4 of these units, and because all are
pishuonlain [190]
P(defective) = 3/12 = 1/4
P(good) = 1 - 1/4 = 3/4
P(2\ good)=4C2\times0.75^{2}\times0.25^{2}=0.211
P(3\ good)=4C3\times0.75^{3}\times0.25=0.422
P(4\ good)=0.75^{4}=0.316
The probability that at least 2 units are good is given by:
P(2 good) + P(3 good) + P(4 good) = 0.211 + 0.422 + 0.316 = 0.949.

4 0
3 years ago
Read 2 more answers
Which statement is true about the solution to this system of
ivann1987 [24]
The two lines coincide. The two equations have the same slope and intercept. If you multiply the second equation by 3, you’ll get the first equation.
5 0
3 years ago
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The authors of a paper presented a correlation analysis to investigate the relationship between maximal lactate level x and musc
ArbitrLikvidat [17]

Answer:

a) Sample correlation coefficient, r = 0.7411

bi) test statistic, t = 4.102

bii) P-value = 0.000736

Step-by-step explanation:

a) The formula for the sample correlation coefficient is given by the formula:

r = \frac{S_{xy} }{\sqrt{S_{xx} S_{yy} }} }

S_{xx} = 2,648,130.357\\S_{yy} = 36.7376,\\S_{xy} = 7408.225

r = \frac{7408.225}{\sqrt{2648130.357*36.7376} }

r = 0.7511

b)

i) formula for the test statistic is given by the formula:

t = \frac{r\sqrt{n-1} }{\sqrt{1 - r^{2} } }

sample size, n = 4

t = \frac{0.7511\sqrt{14-1} }{\sqrt{1 - 0.7511^{2} } }

t = 4.102

ii) Degree of freedom, df = n -2

df = 14 -2

df = 12

The P-value is calculate from the degree of freedom and the test statistic using excel

P-value =(=TDIST(t,df,tail))

P-value = (=TDIST(4.1,12,1)

P-value = 0.000736

4 0
3 years ago
How is the expression 7-^4 written using a positive exponent?<br><br> 1/7^4<br> 7^4<br> 4^7<br> 28
BARSIC [14]
4 with an exponent of 7 is like saying 4*4*4*4*4*4*4
7 with an exponent of 4 is like saying 7*7*7*7
8 0
3 years ago
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