Can someone explain the answers to this

The mean weight of the 1000 men is 78 kg. The standard deviation (SD) is 9kg.

What weight did 2% of men in this sample weigh less than or equal to?

(Answer is 60kg idk how)

The mean weight of the 1000 men is 78 kg. The standard deviation (SD) is 9kg.

What weight did 2% of men in this sample weigh less than or equal to?

(Answer is 60kg idk how)

There’s a table:

Weight. Number of men

45.0 - 50.0 kg. 2

50.1 - 55.0 kg. 6

55.1 - 60.0 kg. 12

60.1 - 65.0 kg. 54

65.1 - 70.0 kg. 101

70.1 - 75.0 kg. 193

75.1 - 80.0 kg. 209

80.1 - 85.0 kg. 212

85.1 - 90.0 kg. 126

90.1 - 95.0 kg. 60

95.1 - 100.0 kg. 15

100.1 - 105.0 kg. 8

105.1 - 110.0 kg. 2

Total. 1000

I can’t use the calculator function from all maths, this is a question from this public health module i’m doing at uni.

Haven’t done maths in a while so i’m confused

Weight. Number of men

45.0 - 50.0 kg. 2

50.1 - 55.0 kg. 6

55.1 - 60.0 kg. 12

60.1 - 65.0 kg. 54

65.1 - 70.0 kg. 101

70.1 - 75.0 kg. 193

75.1 - 80.0 kg. 209

80.1 - 85.0 kg. 212

85.1 - 90.0 kg. 126

90.1 - 95.0 kg. 60

95.1 - 100.0 kg. 15

100.1 - 105.0 kg. 8

105.1 - 110.0 kg. 2

Total. 1000

I can’t use the calculator function from all maths, this is a question from this public health module i’m doing at uni.

Haven’t done maths in a while so i’m confused

Original post by chavvo

is there any more context to this question? I would normally (no pun intended) expect there to be an assumption about a normal distribution, then the question is about standardizing the distribution and finding where the standard score is <= 0.02

Forgot to add it doesn’t say anything about the distribution

Original post by confusedy13

Forgot to add it doesn’t say anything about the distribution

Original post by mqb2766

2% of 1000 is 20, so which weight corresponds to 20 people being less than it?

The answer is 60kg to the nearest whole number tho i just dont know the working out how to get there

Original post by confusedy13

The answer is 60kg to the nearest whole number tho i just dont know the working out how to get there

Original post by confusedy13

Forgot to add it doesn’t say anything about the distribution

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