week 3 assignment question 6

[Rasia Naseem]

6 ) On how many days were there 34 students in the class?

All cases greater than 34 is correct ryt? For eg, 37,42,43,44,45 all these days 34 students were present in class ryt?

[Rahul M]

I gave 5 as the answer too 

[Dhanuush Balakannan]

You should consider the 'exactly 34' in this question. 

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[Aritra Roy]

No. Thats not how you interpret the stem-leaf plot. You got it wrong. Even the key is given. Say, no. of students were 33,37,44,,45 on 4 days. we represent this as :

3|3,7

4|4,5

So, as 3|4 is not present therefore, answer is 0.

On Tuesday, 3 November 2020 at 00:23:25 UTC+5:30 rasia...@gmail.com wrote:

[Rasia Naseem]

unless exactly 34 is specified, the question is ambiguous

[Dhanuush Balakannan]

No it's not ambiguous.  They are asking how many days 34 students attended the class.  They've never used the keywords like at least or more than.  So you must take it as exactly 34 

[Pavan Kumar Reddy Yannam]

If we think about it logically, there are 34 students (not exactly 34 students but they are still there) in the class on 5 days. In the question its not explicitly mentioned that we have to consider exactly 34 students, so i feel the answer should be 5.

[abhishek Prasad]

I have also given 5 as my answer... Because of the class straight is 37,42,43,44,45 then there will be always 34 students'present in the class.

[Sayli Gokhale]

Same here. ( Either the question should be "exactly 34 students" or 5 is correct answer.

[Amol Kumbhar]

I too confused and answered 5 ... 

[Ashish Verma]

Let me clear it up for you who are saying answer should be five or something.

Question : "A week has 5 days". Is the statement true or false.?

Answer :

A week has 7 days which is more than 5 so logically it is TRUE.

But you will most probably answer the above question as FALSE because there is no mention "...of at least 5 days". 

You got it, right?

[Sayli Gokhale]

As I have read the other threads, I think the acceptable explanation is that they have asked about '34 students' and have not asked about 'more than 34 students'.

[Harikumar P]

I am also confused regarding the question as well as the answer

Suppose if  different days are considered different sets of numbers of students present in the class  and  if we ask the same question,can you be able to find an empty set?

Moreover  >34 entirely different from >=34 and from mere 34

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[Statistics 1 Support 1]

Hello,

This question can be considered as a set of numbers, with each number in the set being equal to the number of students on a given day. So, the question is does 34 is contained in the set. From the data given, 34 is not contained in the set. So, the number of times 34 occurs in the set is 0.

Thanks & Regards,

Ram,

Course Support Team

[Harikumar P]

Thank you sir for the clarification but it is very difficult  to interpret from the question because of whether we need to put  elements as numbers  in each sets or we need to name  the sets as whole in one number on a particular day (34) itself

With Thanks and Regards

Harikumar.P

[Statistics 1 Support 1]

Hello,

It is just a single set with each number as an element in the set. This question is not related to sets but just explaining from your perspective. 

Thanks,

Ram,
Course Support Team

[Harikumar P]

Thank you for the clarification.

[CG]

Hello Ram,

The perspective could also be 

The set of students in a class on day X : {1,2,3,4.......22,23,24,25,26} - There are 26 students in class or 26 elements in the set

The set of students in a class on day Y : {1,2,3,4.......29,30,31,32,33} - There are 33 students in class or 33 elements in the set

The set of students in a class on day Z : {1,2,3,4.......33,34,35,36,37} - There are 37 students in class or 37 elements in the set. 

and so on .... 16 sets for 16 days 

This perspective is not wrong. Neither is the perspective when you consider the numbers represented by the stem and leaf plot as a set. Ambiguity could have been reduced by specifying an additional word "exactly" in the question.

For the sake of comparison, a variable like number of students in a class is not analogous to a globally well defined constant like number of days in a week.

Suppose the school has a rule that only if there are at least 34 students in class will the teacher get paid. So the school accountant asks rather ambiguously, "On how many days were there 34 students in the class?" . If he concludes that there were zero days where there were 34 students in class, the teacher will not get paid. 

Just saying ..

Now I have another doubt related to this. Can I conclude safely that the stem and leaf plot in this question represents the attendance of 16 days . How are duplicates handled in the stem and leaf plot - I am unable to recall whether this was discussed in the lecture. 

Thank You.

[Harikumar P]

I think duplicates are repeated in stem and leaf diagrams.

If that is the case empty sets (no students present in a day) should be represent as 0|0 in stem and leaf diagram.

then the answers both 0 and 5 are wrong because both 0 as well as 34 not in the stem and leaf diagram

otherwise empty sets contain every set and cannot be represented in a stem and leaf diagram..

Any way thanks  C.G (cherain) for your wonderful doubt about duplicate as well as answer with respect to salary of the teacher

With Regards

Harikumar.P

[CANDRA JEET Raj]

sir my week 3 assignment not submitted due to network issues.

please help me sir otherwise i am not qualify for hall ticket

On Tuesday, 3 November 2020 at 00:23:25 UTC+5:30 rasia...@gmail.com wrote:

[CANDRA JEET Raj]

sir my week 3 assignment not submitted due to network issues.

please help me sir otherwise i am not qualify for hall ticket

[CANDRA JEET Raj]

sir my week 3 assignment not submitted due to network issues.

please help me sir otherwise i am not qualify for hall ticket

On Tuesday, 3 November 2020 at 00:23:25 UTC+5:30 rasia...@gmail.com wrote: