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Question 19 4 pts A survey of 64 families yields the following data for the number...
Question 25 A survey of families yields the following data for the number of children per...
Question 25 A survey of families yields the following data for the number of children per family. Number of Children Frequency 10 3 1 11 18 N 3 11 4 6 5 4 What probability of the families in the survey had at most 2 children? Write your answer a decimal to the thousandths place. MacBook Air F3 000 F4 FS F6 F7
QUESTION 19 You must design a survey for a school project. You are randomly selecting families...
QUESTION 19 You must design a survey for a school project. You are randomly selecting families and surveying all of the children in those families. You need a sample of at least 30 children for your survey. The table below shows the average number of children in US families. How many families would you expect to survey to reach your sample size of at least 30 children? You will perform your simulation once using the random numbers given in question...
A telephone survey of American families is conducted to determine the number of children in the...
A telephone survey of American families is conducted to determine the number of children in the average American family, Past experience has shown that 30% of the families who are telephoned will refuse to respond to the survey. Which of the following statements is not a binomial random variable? A. The number of families out of 50 who refuse to respond to the survey. B. All of the choices are binomial random variables. C. The number of children in a...
In a statistical survey of 2000 families on ownership of cars 30 families responded that they...
In a statistical survey of 2000 families on ownership of cars 30 families responded that they do not own a car, 470 families owned 1, 850 families owned 2, 490 fam- ilies owned 3, 150 owned 4, and there were 10 families which owned 10 cars each. (a)[5 pts] Plot the sample-based Probability Mass Function (PMF) and Cu- mulative Distribution Function (CDF) of the random variable corresponding to number of cars per family. Calculate the expected number of cars per...
Question 4.112 pts Following data relate to the number of children per household (HH). Consider a...
Question 4.112 pts Following data relate to the number of children per household (HH). Consider a population of 36 HHs. HH# HH# 2 HH# # of HH children 1 7 2 8 8 3 6 9 4 4 10 5 5 11 6 1 12 # of children 3 7 5 4 10 4 13 14 15 16 17 18 # of HHs children # 4 19 0 20 3 21 4 22 3 23 0 24 # of children...
A survey was conducted in which 125 families were asked how many cats lived in their...
A survey was conducted in which 125 families were asked how many cats lived in their households. The results are shown below. a) What is the probability that a randomly selected family has one cat? b) What is the probability that a randomly selected family has more than one cat? c) What is the probability that a randomly selected family has cats? d) Is this an example of classical, empirical, or subjective probability? Number of Cats Number of Households 0...
In Table 4.4 the random variable X represents the number of boys in families with 4...
In Table 4.4 the random variable X represents the number of boys in families with 4 children. TABLE 4.4 Number of boys in families with 4 children х Pr(X= x) 0 1 1/16 1/4 3/8 (a) What is the expected value of X? What does it mean? (b) What is the standard deviation of X? (c) What is the cdf of X? 2 3 4 1/4 1/16
QUESTION 4 Question 4-5 are based on the following information: A survey conducted by the American...
QUESTION 4 Question 4-5 are based on the following information: A survey conducted by the American Automobile Association showed that a family of four spends an average of $215.60 per day while on vacation. Suppose a sample of 64 families of four vacationing at Niagara Falls resulted in a sample mean of $252.45 per day and a sample standard deviation of $70.00. Develop a 95% confidence interval estimate of the mean amount spent per day by a family of four...
4:12 7 11 Exit Question 10 5 pts The pie chart shows the number of times...
4:12 7 11 Exit Question 10 5 pts The pie chart shows the number of times a group of survey respondents watched the news in the past week. No times 2% 7 or more times 5% 3-4 times 34% 5-6 times 18% 1-2 times 41% If the number of respondents in the study was approximately 44,322, estimate how many stated that they watched the news 5-6 times in the last week. 12,000 respondents 8000 respondents 6000 respondents 0 10,000 respondents
As part of a survey, 18 college graduates and 19 non-graduates were asked, "How many hours...
As part of a survey, 18 college graduates and 19 non-graduates were asked, "How many hours did you spend at your job last week?" The results are shown in the stem-and-leaf display below. Answer the questions that follow. Number of hours at work Graduates Non-graduates 9 2 2 7 6 6 5 4 4 2 0 3 2 2 3 3 8 5 5 421 402 4 6 7 8 9 9 3000 5 014 7 8 Key: 29 92...
Question 25 A survey of families yields the following data for the number of children per family. Number of Children Frequency 10 3 1 11 18 N 3 11 4 6 5 4 What probability of the families in the survey had at most 2 children? Write your answer a decimal to the thousandths place. MacBook Air F3 000 F4 FS F6 F7
A telephone survey of American families is conducted to determine the number of children in the average American family, Past experience has shown that 30% of the families who are telephoned will refuse to respond to the survey. Which of the following statements is not a binomial random variable? A. The number of families out of 50 who refuse to respond to the survey. B. All of the choices are binomial random variables. C. The number of children in a...
In a statistical survey of 2000 families on ownership of cars 30 families responded that they do not own a car, 470 families owned 1, 850 families owned 2, 490 fam- ilies owned 3, 150 owned 4, and there were 10 families which owned 10 cars each. (a)[5 pts] Plot the sample-based Probability Mass Function (PMF) and Cu- mulative Distribution Function (CDF) of the random variable corresponding to number of cars per family. Calculate the expected number of cars per...
Question 4.112 pts Following data relate to the number of children per household (HH). Consider a population of 36 HHs. HH# HH# 2 HH# # of HH children 1 7 2 8 8 3 6 9 4 4 10 5 5 11 6 1 12 # of children 3 7 5 4 10 4 13 14 15 16 17 18 # of HHs children # 4 19 0 20 3 21 4 22 3 23 0 24 # of children...
In Table 4.4 the random variable X represents the number of boys in families with 4 children. TABLE 4.4 Number of boys in families with 4 children х Pr(X= x) 0 1 1/16 1/4 3/8 (a) What is the expected value of X? What does it mean? (b) What is the standard deviation of X? (c) What is the cdf of X? 2 3 4 1/4 1/16
4:12 7 11 Exit Question 10 5 pts The pie chart shows the number of times a group of survey respondents watched the news in the past week. No times 2% 7 or more times 5% 3-4 times 34% 5-6 times 18% 1-2 times 41% If the number of respondents in the study was approximately 44,322, estimate how many stated that they watched the news 5-6 times in the last week. 12,000 respondents 8000 respondents 6000 respondents 0 10,000 respondents
As part of a survey, 18 college graduates and 19 non-graduates were asked, "How many hours did you spend at your job last week?" The results are shown in the stem-and-leaf display below. Answer the questions that follow. Number of hours at work Graduates Non-graduates 9 2 2 7 6 6 5 4 4 2 0 3 2 2 3 3 8 5 5 421 402 4 6 7 8 9 9 3000 5 014 7 8 Key: 29 92...
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