A scientific report established that 95% of cows that are vaccinated don't acquire cholera. Suppose that...
A scientific report established that 95% of cows that are vaccinated don't acquire cholera. Suppose that a rancher buys 6 vaccinated cows. Define the random variable as the number of cows that acquire cholera.
A. What is the probability of none acquiring cholera?
B. Average number.
C. What is the probability that 3 or more acquire cholera?
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A scientific report established that 95% of cows that are
vaccinated don't acquire cholera. Suppose that...
3. Suppose we are interested to study the number of customers arriving at a bank in...
3. Suppose we are interested to study the number of customers arriving at a bank in a random work day. Previously we learned that the average number of customers per day is 100. (a) Define a random variable X for the number of customers arriving in a random work day. (b) Find the probability mass function. (c) Computer the probability that there will be at least 75 customers arriving at a random work day. (d)Derive the expected value (mean) of...
A survey taken in a farming village in Nepal asked, "How many bullocks does your household...
A survey taken in a farming village in Nepal asked, "How many bullocks does your household have?" and "How many cows does your household have?" The probability distributions of number of bullocks B and number of cows C shown here are consistent with the data published by the Inter-University Consortium for Political and Social Research (ICPSR). 0 1 2 3 Probability 0.66 0.04 0.28 0.02 0 1 2 3 4 Probability 0.78 0.11 0.06 0.03 0.02 (a) If we draw...
miben so with the 68-95-99.7 Rule) on the included normal distribution 1. Suppose exam scores form...
miben so with the 68-95-99.7 Rule) on the included normal distribution 1. Suppose exam scores form an approximately normal distribution that has 500 points and 100 points. Letter grades on the exam were distributed as follows: Ds made up 15% of the exam, Ca 59%, Bs 13.5%, As 2.5%, and the rest Fs. () If 1466 students scored 733 points or more, how many students took the exam? students (b) What are the point cutoffs for each letter grade? <A...
Suppose that on average, a certain region is hit by 3 hurricanes per year. Assuming that...
Suppose that on average, a certain region is hit by 3 hurricanes per year. Assuming that the number of hurricanes in a year is a Poisson random variable, what is the probability that in a particular year there will be no more than 2 hurricanes?
1.) Suppose that a box contains 8 cameras and that 3 of them are defective. A...
1.)
Suppose that a box contains 8 cameras and that 3 of them are
defective. A sample of 2 cameras is selected at random. Define the
random variable X as the number of defective cameras in the
sample.
Hint: Make a probability tree for selecting 2 cameras without
replacement.
Write the probability distribution for X.
k
P(X=k)
What is the expected value of X?
2.)
Assume that a procedure yields a binomial distribution with a
trial repeated n=5n=5 times. Find...
Rules for using a Table within a scientific report: 1. Tables within scientific reports contain s...
Rules for using a Table within a scientific report: 1. Tables within scientific reports contain summary information, not the raw data collected during an experiment 2. The table caption is located at the top of the table. 3. The table caption should define all abbreviations used in the table and the sample size of the data represented. Table 1. Mean turbidity scores t S.E. for spontancous generation of life from inorganic material trials using nutrient agar as a growth environment....
PLEASE ANSWER QUESTION # 5 a and b !!!!!!!!!! 4) Chapter 4-5: a) You flip a balanced coin 3 times. What is the probabil...
PLEASE ANSWER QUESTION # 5 a and b !!!!!!!!!!
4) Chapter 4-5: a) You flip a balanced coin 3 times. What is the probability that you get 3 heads? b) You flip a balanced coin 3 more times. What is the probability that you get 3 tails? c) What is the probability that you get 3 heads followed by 3 tails? d) What is the probability that you get exactly 1 head in the 6 flips? 5) Chapter 6: a)...
1. Suppose that random variables X and Y are independent and have the following properties: E(X)...
1. Suppose that random variables X and Y are independent and have the following properties: E(X) = 5, Var(X) = 2, E(Y ) = −2, E(Y 2) = 7. Compute the following. (a) E(X + Y ). (b) Var(2X − 3Y ) (c) E(X2 + 5) (d) The standard deviation of Y . 2. Consider the following data set: �x = {90, 88, 93, 87, 85, 95, 92} (a) Compute x¯. (b) Compute the standard deviation of this set. 3....
3. Suppose a random sample of 300 U.S. college students was obtained and the average number...
3. Suppose a random sample of 300 U.S. college students was obtained and the average number of hours of sleep per night for each individual was determined. It was then determined that those students who averaged at least 7 hours of sleep per night had a higher cumulative gpa, on average, than those who did not Define the following: (a) The population(s) of interest.(The independent variables) (b) The variable measured.(The dependent variable). Is this an observational study or experiment? (c)...
3. Suppose we are interested to study the number of customers arriving at a bank in a random work day. Previously we learned that the average number of customers per day is 100. (a) Define a random variable X for the number of customers arriving in a random work day. (b) Find the probability mass function. (c) Computer the probability that there will be at least 75 customers arriving at a random work day. (d)Derive the expected value (mean) of...
A survey taken in a farming village in Nepal asked, "How many bullocks does your household have?" and "How many cows does your household have?" The probability distributions of number of bullocks B and number of cows C shown here are consistent with the data published by the Inter-University Consortium for Political and Social Research (ICPSR). 0 1 2 3 Probability 0.66 0.04 0.28 0.02 0 1 2 3 4 Probability 0.78 0.11 0.06 0.03 0.02 (a) If we draw...
miben so with the 68-95-99.7 Rule) on the included normal distribution 1. Suppose exam scores form an approximately normal distribution that has 500 points and 100 points. Letter grades on the exam were distributed as follows: Ds made up 15% of the exam, Ca 59%, Bs 13.5%, As 2.5%, and the rest Fs. () If 1466 students scored 733 points or more, how many students took the exam? students (b) What are the point cutoffs for each letter grade? <A...
1.)
Suppose that a box contains 8 cameras and that 3 of them are
defective. A sample of 2 cameras is selected at random. Define the
random variable X as the number of defective cameras in the
sample.
Hint: Make a probability tree for selecting 2 cameras without
replacement.
Write the probability distribution for X.
k
P(X=k)
What is the expected value of X?
2.)
Assume that a procedure yields a binomial distribution with a
trial repeated n=5n=5 times. Find...
Rules for using a Table within a scientific report: 1. Tables within scientific reports contain summary information, not the raw data collected during an experiment 2. The table caption is located at the top of the table. 3. The table caption should define all abbreviations used in the table and the sample size of the data represented. Table 1. Mean turbidity scores t S.E. for spontancous generation of life from inorganic material trials using nutrient agar as a growth environment....
PLEASE ANSWER QUESTION # 5 a and b !!!!!!!!!!
4) Chapter 4-5: a) You flip a balanced coin 3 times. What is the probability that you get 3 heads? b) You flip a balanced coin 3 more times. What is the probability that you get 3 tails? c) What is the probability that you get 3 heads followed by 3 tails? d) What is the probability that you get exactly 1 head in the 6 flips? 5) Chapter 6: a)...
3. Suppose a random sample of 300 U.S. college students was obtained and the average number of hours of sleep per night for each individual was determined. It was then determined that those students who averaged at least 7 hours of sleep per night had a higher cumulative gpa, on average, than those who did not Define the following: (a) The population(s) of interest.(The independent variables) (b) The variable measured.(The dependent variable). Is this an observational study or experiment? (c)...
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