Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

QUESTION ONE [40] Covid-19 took the world by storm and by April 2020, large numbers of people around the world were tested positive for the

image text in transcribedimage text in transcribed
QUESTION ONE [40] Covid-19 took the world by storm and by April 2020, large numbers of people around the world were tested positive for the virus. In the frequency distribution below, the number of people infected in 40 different countries are given. Hundreds of thousands of people infected Number of countries [1.0 ; 3.0) 5 [3.0 ; 5.0) 8 [5.0; 7.0) 17 [7.0 ; 9.0) 6 [9.0; 11.0) 3 [11.0; 13.0) TOTAL 40 1.1 Calculate the estimated mean number of people infected in these 40 countries. (4) 1.2 Compute the median. (5) 1.3 calculate the mode. (5) 1.4 What information about the skewness of the data can be inferred from your answers to (1.1), (1.2) and (1.3) above? (3) 1.5 Calculate the coefficient of variation for the above data (9) 1.6 Calculate the mid-50% range the above data (7) 1.7 Construct the ogive greater than ogive and show the median calculated in 1.2 above (7 )QUESTION TWO [30] An insurance manager believes that the number of new policies written annually by his agents is related to the number of years of selling experience that these agents have. A random sample of 12 agents revealed the data in the table below: Number of years of experience Number of new policies written annually 2 17 22 34 6 37 12 50 9 41 5 13 20 48 13 39 4 20 10 35 20 63 For the above data: 2.1 determine the dependent and the independent variable (2) 2.2 using appropriate computational formulae find the least-square regression line. (6) 2.3 Interpret the y- intercepts of regression equation in question 2.2 above (4) 2.4 Calculate the Pearson's correlation coefficient for the above data (10) 2.5 interpret the correlation coefficient calculate in question 2.4 above (3) 2.6 Predict the number of policies written annually by an agent with 3 years of experience

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image_2

Step: 3

blur-text-image_3

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Trigonometry

Authors: David M Kennedy, James Stewart, Lothar Redlin, Saleem Watson

2nd Edition

1285226089, 9781285226088

More Books

Students also viewed these Mathematics questions

Question

Mortality rate

Answered: 1 week ago

Question

Armed conflicts.

Answered: 1 week ago