Jump to

- Chapter 1- Rational and Irrational Numbers
- Chapter 2- Compound Interest [Without Using Formula
- Chapter 3- Compound Interest [Using Formula
- Chapter 4- Expansions
- Chapter 5- Factorisation
- Chapter 6- Simultaneous Equations
- Chapter 7- Indices [exponents]
- Chapter 8- Logarithms
- Chapter 9- Triangles [Congruency in Triangles]
- Chapter 10- Isosceles Triangle
- Chapter 11- Inequalities
- Chapter 12- Mid-Point and Its Converse
- Chapter 13- Pythagoras Theorem
- Chapter 14- Rectilinear Figures
- Chapter 15- Construction of Polygons
- Chapter 16- Area Theorems
- Chapter 17- Circles
- Chapter 18- Statistics
- Chapter 19- Mean and Median
- Chapter 20- Area and Perimeter of Plane Figures
- Chapter 21- Solids
- Chapter 22- Trigonometrical Ratios
- Chapter 23- Trigonometrical Ratios of Standard Angles
- Chapter 24- Solution Of Right Triangles
- Chapter 25- Complementary angles
- Chapter 26- Co-ordinate Geometry
- Chapter 27- Graphical Solution
- Chapter 28- Distance Formula

Exercises in Chapter 18 chapter 18 statistics Grade 9

Questions in Exercise 18(A)

Questions in Exercise 18(B)

Construct a combined histogram and frequency polygon for the following frequency distribution:

Class-intervals | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 |
---|---|---|---|---|---|

Frequency | 3 | 5 | 6 | 4 | 2 |

Construct a frequency polygon for the following data:

Class-intervals | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 |
---|---|---|---|---|---|

Frequency | 5 | 8 | 12 | 9 | 4 |

The daily wages in a factory are distributed as follows:

Daily Wages | 125-175 | 175-225 | 225-275 | 275-325 | 325-375 |
---|---|---|---|---|---|

No. of workers | 4 | 20 | 22 | 10 | 6 |

Draw frequency polygons for each of the following frequency distribution;

(a) Using histogram

(b) Without using histogram

(i)

C.I | 10-30 | 30-50 | 50-70 | 70-90 | 90-110 | 110-130 | 130-150 |
---|---|---|---|---|---|---|---|

f | 4 | 7 | 5 | 9 | 5 | 6 | 4 |

(ii)

C.I | 5-15 | 15-25 | 25-35 | 35-45 | 45-55 | 55-65 |
---|---|---|---|---|---|---|

f | 8 | 16 | 18 | 14 | 8 | 2 |

Was This helpful?

Chapters in this book

Lido

Courses

Quick Links

Terms & Policies

Terms & Policies

2022 © Quality Tutorials Pvt Ltd All rights reserved