2. According to a study on the effect of music downloading on spendingon music, 11% of all Internet users had decreased their spending onmusic. If 40% of all music fans used the Internet and if 20% of non-Internet users had decreased their spending on music, what percentageof those who decreased their spending on music were Internet users.Let D be the event decreased spending, I be the event an Internet user.You are asked to find P(ID)

Given information: Let D be the event decreased spending. I be the event an Internet user. 11% of…

Answered: 2. According to a study on the effell U…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Q.1 What do you understand by measure of central tendency?
4. Which of the following factors has the highest positive correlation with life expectancy in some countries in Asia? Why do you think this factor has the highest correlation with life expectancy? Use the data below. World Happiness Report 2016 (Cantril Ladder (0=worst; 10=best))*** Vegetable supply Life expectancy (years)* Average annual hours worked by each person** per person Country (kilograms per year)**** Cambodia 69.3 103.0 4.6 30.3 Hong Kong 84.5 91.0 5.4 129.9 India 69.2 89.0 4.0 79.9 Japan Myanmar Philippines South Korea Sri Lanka 84.3 73.0 5.9 91.1 66.6 102.0 4.2 82.8 71.0 90.0 5.6 62.6 82.6 86.0 5.9 197.1 76.6 81.0 4.3 49.8 Taiwan 80.1 83.0 6.4 117.8 Thailand 76.7 91.0 5.9 39.9 Turkey 77.2 77.0 5.6 254.1 Vietnam 75.2 91.0 5.2 170.5
15. Commercial real estate prices and rental rates suffered substantial declines in 2008 and 2009 (Newsweek, July 27, 2009). These declines were particularly severe in AsiaB annual lease rates in Tokyo, Hong Kong, and Singapore declined by 40% or more. Even with such large declines, annual lease rates in Asia were still higher than those in many cities in Europe. Annual lease rates for a sample of 30 commercial properties in Hong Kong showed a mean of $1,114 per square meter with a standard deviation of $230.
Age and Gender. The U.S. Census Bureau publishes census data on the resident population of the United States in Current Population Survey. According to that document, 7.3% of male residents are in the age group 20–24 years. a. If no association exists between age group and gender, what percentage of the resident population would be in the age group 20–24 years? Explain your answer.b. If no association exists between age group and gender, what percentage of female residents would be in the age group 20–24 years? Explain your answer.c. There are about 158 million female residents of the United States. If no association exists between age group and gender, how many female residents would there be in the age group 20–24 years?d. In fact, there are some 10.9 million female residents in the age group 20–24 years. Given this number and your answer to part (c), what do you conclude?
5. In the United States, there is a strong relationship between education and smoking: well-educated people are less likely to smoke. Does a similar relationship hold in France? To find out, researchers recorded the level of education and smoking status of a random sample of 459 French men aged 20 to 60 years.36 The two-way table below displays the data. Is there convincing evidence of an association between smoking status and educational level among French men aged 20 to 60 years? Smoking Status Nonsmoker Former Moderate Heavy Primary School 56 54 41 36 Education Secondary School 37 43 27 32 University 53 28 36 16
5. Suppose that 68% of all adults think that airplanes would be safer places if airline passengers were banned from carrying on board any luggage, including purses, computers, and briefcases. An opinion poll plans to ask an SRS of 1023 adults about airplane safety. The proportion of the sample who think that airplanes would be safer if passengers were banned from carrying on board any luggage, including purses, computers, and briefcases, will vary if we take many samples from this same population. The sampling distribution of the sample proportion is approximately Normal with mean 0.68 and standard deviation about 0.015. Sketch this Normal curve and use it to answer the following question. Round to nearest tenth percent. What is the probability of getting a sample in which more than 70% think that airplanes would be safer if passengers were banned from carrying on board any luggage, including purses, computers, and briefcases?
Do you think the results of the study might be applicable to the whole population? Why or why not?
(True/False). These data show that 80% of companies worth $75K or more are tracking the online and cellphone activity of 47% percent of US adults. (True/False). These data show that in comparison to companies, the government is less likely to track online activity. (True/False). These data show that companies run by individuals ages 18 to 29 years old are the most likely to track online activity. (True/False). These data show that the government is very likely to track Black adults (60%) and Hispanic adults (56%) and less likely to track White adults (43%).
24. According to the Centers for Disease Control and Prevention (CDC), 26% of Americans are "anti-vax". To verify this, 1,000 Americans were asked and 324 of them said they are "anti-vax". What is the population, sample, statistic, paramter, variable, and constants?
6.34. Cheating during a test. A national survey of high school students conducted by the Josephson Institute of Ethics was sent to 43,000 high school students, and 40,774 were returned. One question asked students if they had cheated during a test in the last school year.15 Of those who returned the survey, 14,028 responded that they had cheated at least two times in the last year. In Exercise 6.34, you examined the proportion of high school students who cheated on tests at least twice during the past year. Also available are results from other years. A reported 14,028 out of 40,774 students said they cheated at least twice in 2010. A reported 5794 out of 12,121 students said they cheated at least twice in 2002. Give an estimate of the difference between these two proportions with a 90% confidence interval.
3. Eight different aged patients are tested on their sugar levels in a laboratory to know whether there is any relationship between the age and blood sugar level. Using appropriate method, analyze the following data and give your comments on the same. Patients 10 15 20 25 30 35 40 45 Blood- 70 85 110 180 125 100 180 120 Sugar level
Q.31 Define deseasonalisation of data.

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2. According to a study on the effell U on music, 11% of all Internet users h music. If 40% of all music fans used Internet users had decreased their s decreased their spend