EBK PRACTICE OF STATISTICS IN THE LIFE
EBK PRACTICE OF STATISTICS IN THE LIFE
4th Edition
ISBN: 9781319067496
Author: BALDI
Publisher: VST
Question
Book Icon
Chapter 12, Problem 12.35E

(a)

To determine

To find out what are n and p , X have a binomial distribution.

(a)

Expert Solution
Check Mark

Answer to Problem 12.35E

  n=6 and p=0.75 .

Explanation of Solution

In the question, it is given that the West African country of Guinea has the highest rate of malaria in the world with 75% of its population being infected. And let X be the count of patients who are infected with malaria among the 6 patients the doctor saw. Thus, we know that X follows binomial distribution then we have sample size of 6 and the population proportion will be the probability of population being infected, 75% . Thus, we have,

  XBin(6,0.75) .

(b)

To determine

To find out what are the possible values that X can take.

(b)

Expert Solution
Check Mark

Answer to Problem 12.35E

  S={0,1,2,3,4,5,6} .

Explanation of Solution

In the question, it is given that the West African country of Guinea has the highest rate of malaria in the world with 75% of its population being infected. And let X be the count of patients who are infected with malaria among the 6 patients the doctor saw. Thus, we know that X follows binomial distribution with,

  XBin(6,0.75)

Thus, the possible values for X will be as:

  S={0,1,2,3,4,5,6} as the sample size is six.

(c)

To determine

To find the probability of each value of X and draw a probability histogram of X .

(c)

Expert Solution
Check Mark

Answer to Problem 12.35E

    XExact probability
    00.000244
    10.004395
    20.032959
    30.131836
    40.296631
    50.355957
    60.177979

Explanation of Solution

In the question, it is given that the West African country of Guinea has the highest rate of malaria in the world with 75% of its population being infected. And let X be the count of patients who are infected with malaria among the 6 patients the doctor saw. Thus, we know that X follows binomial distribution with,

  XBin(6,0.75)

Thus, the probability of each value of X can be calculated by using the binomial excel function:

  =BINOM.DIST(numbers, trials, prob, cumulative)

In the cumulative, the FALSE gives the exact value and TRUE gives the less than value.

Thus, the calculation will be as:

    XExact probability
    0=BINOM.DIST(AJ116,6,0.75,FALSE)
    1=BINOM.DIST(AJ117,6,0.75,FALSE)
    2=BINOM.DIST(AJ118,6,0.75,FALSE)
    3=BINOM.DIST(AJ119,6,0.75,FALSE)
    4=BINOM.DIST(AJ120,6,0.75,FALSE)
    5=BINOM.DIST(AJ121,6,0.75,FALSE)
    6=BINOM.DIST(AJ122,6,0.75,FALSE)

The result will be as:

    XExact probability
    00.000244
    10.004395
    20.032959
    30.131836
    40.296631
    50.355957
    60.177979

Thus, the probability histogram of X will be as:

EBK PRACTICE OF STATISTICS IN THE LIFE, Chapter 12, Problem 12.35E , additional homework tip  1

(d)

To determine

To find out what are the mean and standard deviation of this distribution and mark the location of the mean on your histogram.

(d)

Expert Solution
Check Mark

Answer to Problem 12.35E

The mean is 4.5 and the standard deviation is 1.061 .

Explanation of Solution

In the question, it is given that the West African country of Guinea has the highest rate of malaria in the world with 75% of its population being infected. And let X be the count of patients who are infected with malaria among the 6 patients the doctor saw. Thus, we know that X follows binomial distribution with,

  XBin(6,0.75)

Thus, the mean and standard deviation of this distribution will be calculated as:

  Mean=np=6×0.75=4.5St. Dev.=npq=6×0.75×(10.75)=1.061

Thus, the mean in the histogram is shown as:

EBK PRACTICE OF STATISTICS IN THE LIFE, Chapter 12, Problem 12.35E , additional homework tip  2

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
The following are suggested designs for group sequential studies. Using PROCSEQDESIGN, provide the following for the design O’Brien Fleming and Pocock.• The critical boundary values for each analysis of the data• The expected sample sizes at each interim analysisAssume the standardized Z score method for calculating boundaries.Investigators are evaluating the success rate of a novel drug for treating a certain type ofbacterial wound infection. Since no existing treatment exists, they have planned a one-armstudy. They wish to test whether the success rate of the drug is better than 50%, whichthey have defined as the null success rate. Preliminary testing has estimated the successrate of the drug at 55%. The investigators are eager to get the drug into production andwould like to plan for 9 interim analyses (10 analyzes in total) of the data. Assume thesignificance level is 5% and power is 90%.Besides, draw a combined boundary plot (OBF, POC, and HP)
Please provide the solution for the attached image in detailed.
20 km, because GISS Worksheet 10 Jesse runs a small business selling and delivering mealie meal to the spaza shops. He charges a fixed rate of R80, 00 for delivery and then R15, 50 for each packet of mealle meal he delivers. The table below helps him to calculate what to charge his customers. 10 20 30 40 50 Packets of mealie meal (m) Total costs in Rands 80 235 390 545 700 855 (c) 10.1. Define the following terms: 10.1.1. Independent Variables 10.1.2. Dependent Variables 10.2. 10.3. 10.4. 10.5. Determine the independent and dependent variables. Are the variables in this scenario discrete or continuous values? Explain What shape do you expect the graph to be? Why? Draw a graph on the graph provided to represent the information in the table above. TOTAL COST OF PACKETS OF MEALIE MEAL 900 800 700 600 COST (R) 500 400 300 200 100 0 10 20 30 40 60 NUMBER OF PACKETS OF MEALIE MEAL
Knowledge Booster
Background pattern image
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
MATLAB: An Introduction with Applications
Statistics
ISBN:9781119256830
Author:Amos Gilat
Publisher:John Wiley & Sons Inc
Text book image
Probability and Statistics for Engineering and th...
Statistics
ISBN:9781305251809
Author:Jay L. Devore
Publisher:Cengage Learning
Text book image
Statistics for The Behavioral Sciences (MindTap C...
Statistics
ISBN:9781305504912
Author:Frederick J Gravetter, Larry B. Wallnau
Publisher:Cengage Learning
Text book image
Elementary Statistics: Picturing the World (7th E...
Statistics
ISBN:9780134683416
Author:Ron Larson, Betsy Farber
Publisher:PEARSON
Text book image
The Basic Practice of Statistics
Statistics
ISBN:9781319042578
Author:David S. Moore, William I. Notz, Michael A. Fligner
Publisher:W. H. Freeman
Text book image
Introduction to the Practice of Statistics
Statistics
ISBN:9781319013387
Author:David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:W. H. Freeman