Histograms and Frequency Density

The video tutorial explains how to calculate the number of babies with birth weights between 2.5kg and 4kg using a histogram. It involves understanding the histogram bars, calculating the areas of bars representing different weight ranges, and determining the number of babies by converting area measurements into numerical values. The tutorial also discusses the methodology and marks allocation for solving the problem.

What is the main objective of the problem discussed in the video?

• To find the total number of babies in the dataset.

• To calculate the number of babies with birth weights between 2.5kg and 4kg.

• To determine the average birth weight of the babies.

• To identify the heaviest baby in the dataset.

How many babies had a birth weight less than 2.5kg or greater than 4kg?

• 10 babies

• 20 babies

• 6 babies

• 15 babies

What is the area of the bar representing babies with birth weights less than 2.5kg?

• 30 squares

• 20 squares

• 40 squares

• 10 squares

How many squares on the histogram represent one baby?

• 3 squares

• 4 squares

• 5 squares

• 6 squares

What is the total area of the bars representing birth weights between 2.5kg and 4kg?

• 240 squares

• 180 squares

• 150 squares

• 210 squares

How many babies had birth weights between 2.5kg and 4kg?

• 35 babies

• 42 babies

• 60 babies

• 50 babies

What was the first mark awarded for in the question?

• Correctly identifying the number of babies with extreme weights.

• Adding the areas of the bars in the middle.

• Calculating the number of squares representing one baby.

• Providing the final answer of 42 babies.