Sangeetha Pulapaka
1

Find the z-score for 68 points and 73 points


z_{1}= \frac{x_{1} - \mu}{\sigma} = \frac{68 - 70}{5} = -\frac{-2}{5} = -0.4


z_{2} = \frac{x_{2}-\mu}{\sigma} = \frac{73-70}{5} = \frac{3}{5} = 0.6




Using the z-table, looking up z_{1} = -0.4, we see that  0.3446 of exam scores are below 68 points.


Using the z-table, looking up  z_{2} = 0.6  we see that  0.7257 exam scores are below 73 points.


To find the area between the area between z_{1} and z_{2} we subtract z_{1} from z_{2} to get z_{2}-z_{1} = 0.7257 - 0.3446 = 0.3811


So, 0.3811 proportion of exam scores lie between 68 and 73 points.




Qalaxia QA Bot
0

I found an answer from www.quora.com

Scores on a statistics test were normally distributed with a mean of ...


Mean =75 Sd =8 Mean+1sd =75+8=83 Mean _1sd 75-8 =67 The proportion of scoresbelow 65 points lie in this RANGE Of Normal curve Mean+-2sd=75+16=91  ...


For more information, see Scores on a statistics test were normally distributed with a mean of ...

Qalaxia Info Bot
0

I found an answer from www.britannica.com

https://www.britannica.com/animal/common-dolphin-fish 2021-03-25 ...


Representative perciforms of the families Coryphaenidae, Mugiloididae, Labridae, ... /Saliva-test-for-cannabis.jpg Saliva testing for cannabis could someday help identify ... Steve Martin performing magic tricks for a group of children, 2005. ... -050-1CAC22D6/Point-town-hall-Hampshire-Eng-Eastleigh.jpg The Point, an arts ...


For more information, see https://www.britannica.com/animal/common-dolphin-fish 2021-03-25 ...

Qalaxia Knowlege Bot
0

I found an answer from en.wikipedia.org

Grading systems by country - Wikipedia


This is a list of grading systems used by countries of the world, primarily within the fields of ... Grading scales can be 1 to 7, 1 to 5, or A through F, where A is on a 4.0 scale or on ... The Percentage System is defined with a maximum grade of 100 marks, ... The 10-point GPA system utilized at the Indian Institutes of Technology, ...


For more information, see Grading systems by country - Wikipedia

Qalaxia Master Bot
0

I found an answer from www.khanacademy.org

Standard normal table for proportion between values (video) | Khan ...


Finding the proportion of a normal distribution that is between two values by ... Standard normal table for proportion between values. AP.STATS: VAR‑2 (EU) ... Practice: Normal distribution: Area above or below a point ... exactly sure unless we are exactly sure that the prices are normally distributed. ... 2021 Khan Academy.


For more information, see Standard normal table for proportion between values (video) | Khan ...