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lions [1.4K]
3 years ago
5

Helpppp plzzzzzzzzzzzzzzzz

Mathematics
1 answer:
mariarad [96]3 years ago
8 0
I’m a bit confused by the choices you have been given. Are there any other options? If not, I would choose (5.3,9.8) as 9.8 is correct

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Voltage sags and swells. The power quality of a transformer is measured by the quality of the voltage. Two causes of poor power
zysi [14]

Answer:

a

 z-score = 1.57

b

 z-score_s = -3.36

Step-by-step explanation:

From the question we are told that

   The sample size is  n =  103  

    The  sample mean of  sag is  \= x_1 =  353

     The sample mean of swells is  \= x_2 =  184

    The standard deviation of  sag is  s_1  =  30

     The standard deviation of swells is  s_2  =  25

     The number of swell for a randomly selected transformer is  k  =  100

      The number of sag for a randomly selected transformer is  c  =  400

Generally the z-score for the number of swells is mathematically represented as

     z-score_s = \frac{ k - \= x_2}{s_2}

=>   z-score_s = \frac{ 100- 184}{25}

=>     z-score_s = -3.36

       

Generally the z-score for the number of sags is mathematically represented as    

      z-score = \frac{ c - \= x_1}{s_1}

     z-score = \frac{ 400 - 353}{30}

     z-score = 1.57

4 0
3 years ago
Answer this question to get marked as barinliest!!!!!
kap26 [50]
Here’s the answer and working out. Hope it helps

6 0
3 years ago
Convert percents to fractions (Write the answer in SIMPLEST FORM)
Grace [21]
1/4;2/5;83/100;3/2;7/10;4/5
5 0
2 years ago
My friends last question pls answer ASAP
Dafna11 [192]

Answer:

64

Step-by-step explanation:

just count the blocks!

6 0
2 years ago
Read 2 more answers
Please help i will give out brainliest
Aleksandr-060686 [28]

Answer:

a.  L.B. = 20.5

b.  U.B. = 21.5

Step-by-step explanation:

Length is measured 21 cm correct to 2 significant figures

a.  Lower bound of 21

  =  20.5 < 21

  = 20.5

b. Upper bound of 21

   = 21 < 21.5

   = 21.5

4 0
3 years ago
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