Let's break down and solve each task step by step.

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Task 5.1

How many of the students in 9.A worked 7 hours or more in week 9?

To solve this:

• You would need to refer to the data provided in the spreadsheet JOB_MAJ_2020.
• Count the number of students in 9.A who worked 7 hours or more.

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Task 5.2

How many hours did the students in 9.A work on average in week 9?

To calculate the average:
$\text{Average} = \frac{\text{Sum of all hours worked}}{\text{Number of students}}$
From the spreadsheet, sum up the total hours worked by students in 9.A, divide it by the total number of students in that group.

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Task 5.3

Create a diagram showing the distribution of data for students in 9.A.

You need to create a box plot (box-and-whisker diagram) based on the number of hours worked by students in 9.A. Here are the key components for the box plot:

1. Minimum (smallest value).
2. Q1 (first quartile, 25th percentile).
3. Median (Q2, 50th percentile).
4. Q3 (third quartile, 75th percentile).
5. Maximum (largest value).

Use software (like Excel) or graphing tools to plot this box plot.

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Task 5.4

Which of the statements (A, B, or C) about the box plot are correct?

Let's analyze the box plot shown for 9.B:

1. Lea's statement (A):
   "Half of the students in 9.B worked 5 hours or more."

   • In a box plot, the median (line inside the box) shows the middle value. If the median is at or above 5, Lea's statement is correct.

2. Anna's statement (B):
   "Half of the students in 9.B worked between 2 and 5 hours."

   • This statement implies that Q1 (25th percentile) is at 2 and the median (50th percentile) is at 5. If these values match, Anna's statement is correct.

3. Anton’s statement (C):
   "The number of students in 9.B who worked between 2 and 3 hours is the same as the number who worked between 5 and 8 hours."

   • This statement compares the ranges of hours. You need to examine the data spread closely on the box plot to verify whether this is correct.

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Steps to Verify the Correct Statements:

1. Look at the median and quartiles in the box plot to confirm Lea’s and Anna’s statements.
2. For Anton’s claim, check if the frequency distribution aligns for the given ranges.

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If you provide the specific data from the spreadsheet or details of the box plot for 9.A and 9.B, I can give exact answers to these tasks.

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Follow-up Questions:

1. Can you upload the data from the spreadsheet for better analysis?
2. Do you need help constructing a box plot in Excel or another tool?
3. Would you like me to explain how to calculate averages or quartiles step by step?
4. Do you need clarification on how to interpret a box plot?
5. Do you want me to verify specific parts of the statements (A, B, or C)?

Tip:

Remember, in a box plot:

• Q1 to Q3 represents the middle 50% of the data.
• The median divides the data into two equal halves.