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  3. 1the following frequency distribution table describes the waiting time for...

Question: 1the following frequency distribution table describes the waiting time for...

Question details

1.The following frequency distribution table describes the waiting time for the customer’s lunch order at a local Take-Away shop at 12 noon last Monday.    (Do not write minutes after the number in the spaces below)                          

 Determine the:

Waiting Time

minutes

( x )

frequency

( f )

5

4

6

2

7

1

8

6

9

5

10

8

11

3

12

3

Total

 

        1)Mean  (express to 2 decimal places)

       2) Median

       3) Mode

       4) Standard Deviation (Calculator can be used) (Express to 2 decimal places)

        5) Range

        6) Interquartile Range (IQR)

 

 

2.A group of data provided on people’s mass (kg) and height (cm) are presented in the scatter plot below.  The least square equation for the data is approximately.

                                                 Q9

Q9a

1)  Does the variables have a strong or weak correlation?

2) Is this a positive or negative correlation?

3)  What is the gradient? 

4)  What is y-intercept? Give appropriate interpretation for y-intercept.

5)  Predict the mass of a person with a height of 1.80 m 

6)  Predict the mass of a person with a height of 20 cm (explain the result)

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