Ungrouped Data: Standard Deviation

Froggy Jumps

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SD for raw data

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REA LEE G. DELOS SANTOS

Philippines

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Froggy Jumps Ungrouped Data: Standard DeviationVersion en ligne SD for raw data par REA LEE G. DELOS SANTOS 1 SD helps us know… a number of items only b sum of numbers c consistency of data 2 What is the formula for the population standard deviation of ungrouped data? a b c 3 Which step is first in calculating SD for ungrouped data? a Square all data values b Find the mean of all data values c Sort data in ascending order 4 Why do we divide by n-1 in the sample SD? a To correct bias and estimate population variability b To simplify the math c Because n-1 is always 1 less than n 5 Mean is? a the smallest number b the average of the numbers c the biggest number 6 If data: 4, 7, 7, 2, 9, what is the mean? a 5.0 b 5.8 c 6.2 7 After finding the mean, next step is... a Find X – Mean b Square the mean c Add all numbers again 8 What does a high SD indicate? a Data points are very close to the mean b Data points are widely spread from the mean c There is no variability 9 What happens to SD if all data values double? a SD doubles b SD halved c SD unchanged 10 Which statement is true about SD for ungrouped data? a shows how spread out the data is from the mean b always smaller than the mean c is the same as the range

Froggy Jumps

Ungrouped Data: Standard DeviationVersion en ligne

SD for raw data

par REA LEE G. DELOS SANTOS

SD helps us know…

number of items only

sum of numbers

consistency of data

What is the formula for the population standard deviation of ungrouped data?

Which step is first in calculating SD for ungrouped data?

Square all data values

Find the mean of all data values

Sort data in ascending order

Why do we divide by n-1 in the sample SD?

To correct bias and estimate population variability

To simplify the math

Because n-1 is always 1 less than n

Mean is?

the smallest number

the average of the numbers

the biggest number

If data: 4, 7, 7, 2, 9, what is the mean?

5.0

5.8

6.2

After finding the mean, next step is...

Find X – Mean

Square the mean

Add all numbers again

What does a high SD indicate?

Data points are very close to the mean

Data points are widely spread from the mean

There is no variability

What happens to SD if all data values double?

SD doubles

SD halved

SD unchanged

Which statement is true about SD for ungrouped data?

shows how spread out the data is from the mean

always smaller than the mean

is the same as the range

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Ungrouped Data: Standard Deviation

Froggy Jumps

À propos de cette activité

Créé par

Téléchargez la version pour jouer sur papier

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Ungrouped Data: Standard DeviationVersion en ligne

par REA LEE G. DELOS SANTOS

SD helps us know…

What is the formula for the population standard deviation of ungrouped data?

Which step is first in calculating SD for ungrouped data?

Why do we divide by n-1 in the sample SD?

Mean is?

If data: 4, 7, 7, 2, 9, what is the mean?

After finding the mean, next step is...

What does a high SD indicate?

What happens to SD if all data values double?

Which statement is true about SD for ungrouped data?

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