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malfutka [58]
2 years ago
14

Ghdhdjdjdhdghxgxhxhsbzhshzbshzhhz

Mathematics
1 answer:
Ipatiy [6.2K]2 years ago
4 0
8/10= 0.8 tests per minute
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In the diagram below, which distance represent the distance from point D to AB?
lubasha [3.4K]

Answer:

Where is the diagram

Step-by-step explanation:

?????

5 0
3 years ago
In tests of a computer component, it is found that the mean time between failures is 937 hours. A modification is made which is
VladimirAG [237]

Answer:

Null hypothesis is \mathbf {H_o: \mu > 937}

Alternative hypothesis is \mathbf {H_a: \mu < 937}

Test Statistics z = 2.65

CONCLUSION:

Since test statistics is greater than  critical value; we reject the null hypothesis. Thus, there is sufficient evidence to support the claim that the modified components have a longer mean time between failures.

P- value = 0.004025

Step-by-step explanation:

Given that:

Mean \overline x = 960 hours

Sample size n = 36

Mean population \mu = 937

Standard deviation \sigma = 52

Given that the mean  time between failures is 937 hours. The objective is to determine if the mean time between failures is greater than 937 hours

Null hypothesis is \mathbf {H_o: \mu > 937}

Alternative hypothesis is \mathbf {H_a: \mu < 937}

Degree of freedom = n-1

Degree of freedom = 36-1

Degree of freedom = 35

The level of significance ∝ = 0.01

SInce the degree of freedom is 35 and the level of significance ∝ = 0.01;

from t-table t(0.99,35), the critical value = 2.438

The test statistics is :

Z = \dfrac{\overline x - \mu }{\dfrac{\sigma}{\sqrt{n}}}

Z = \dfrac{960-937 }{\dfrac{52}{\sqrt{36}}}

Z = \dfrac{23}{8.66}

Z = 2.65

The decision rule is to reject null hypothesis   if  test statistics is greater than  critical value.

CONCLUSION:

Since test statistics is greater than  critical value; we reject the null hypothesis. Thus, there is sufficient evidence to support the claim that the modified components have a longer mean time between failures.

The P-value can be calculated as follows:

find P(z < - 2.65) from normal distribution tables

= 1 - P (z ≤ 2.65)

= 1 - 0.995975     (using the Excel Function: =NORMDIST(z))

= 0.004025

6 0
3 years ago
The lengths of the sides of a rectangle are shown. Write
Simora [160]

Answer:

4t+6

Step-by-step explanation:

To find the perimeter of the rectangle you add the length of the sides.

Perimeter= t+ t+ t+ 3+ t+ 3= <u>4t+6</u>

or

Perimeter=2(t)+ 2(t+3)=  2t+ 2t+ 6=  <u>4t+6</u>

8 0
3 years ago
Which ordered pairs are solutions to the equation?
Nesterboy [21]

the answer would be B because if you imput the variables the equation comes out equal.
7 0
3 years ago
A wheel turns 1,800 revolutions per minute. How fast does it turn in radians per second?
Flauer [41]
1800:60=30 revolutions per second
30*2π=60π radians per second
3 0
3 years ago
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