Mathematics, 10.04.2020 23:51 payshencec21

A survey of 525 people was conducted to determine whether they have brothers and sisters.
• The results showed that 24% of the people surveyed do not have a sister and 68% of the people surveyed have a
brother
The results also show that 93 of the people surveyed do not have sister and do not have a brother.
Complete the two-way frequency table to show the results of the survey.
Have a Brother
Do Not Have a Brother
Total
Have
Sister
Do
Not
Have
а
Sister
Total
525

Answers: 1

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Answers

Answer from: xoxo12376

Have a brother Do not have a brother Total

Have a sister 324 75 399

Do not have a sister 33 93 126

Total 357 168 525

Explanation:

1. Build the structure of the two-way table:

Have a brother Do not have a brother Total

Have a sister

Do not have a sister

Total

2. Fill in the given information

525 people surveyed: that is the total of the columns and of the rows:

Have a brother Do not have a brother Total

Have a sister

Do not have a sister

Total 525

24% of the people surveyed do not have a sister

24% × 525 = 126

That is the total of the row Do not have a sister

Have a brother Do not have a brother Total

Have a sister

Do not have a sister 126

Total 525

and 68% of the people surveyed have a brother

68% × 525 = 357

That is the total of the column have a brother

Have a brother Do not have a brother Total

Have a sister

Do not have a sister 126

Total 357 525

93 of the people surveyed do not have sister and do not have a brother.

That is the intersection of the row do not have a sister and the colum do not have a brother

Have a brother Do not have a brother Total

Have a sister

Do not have a sister 93 126

Total 357 525

The other missing cells can be found by difference:

126 - 93 = 33525 - 357 = 168

Have a brother Do not have a brother Total

Have a sister

Do not have a sister 33 93 126

Total 357 168 525

357 - 33 = 324168 - 93 = 75525 - 126 = 399

Have a brother Do not have a brother Total

Have a sister 324 75 399

Do not have a sister 33 93 126

Total 357 168 525

Done!

Answer from: Quest

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post
Can someone plz me 1 to 37 . i will earn 10 points

Can someone plz me 1 to 37 . i will earn 10 points

Answer from: Quest

step-by-step explanation:

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A survey of 525 people was conducted to determine whether they have brothers and sisters.
• Th...