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Statistics and Probability
a sample of 200 persons with a particular disease was selected out of these, 100 were given a drug and the others were not given any drug. that cured number of persons who had drug were 65 and had no drug were 55. those who were not cured and had drug were 35 and had no drug were 45. test whether the drug is effective or not.
Statistics and Probability
Given the possible outcomes of the probability experiment, tossing four unbiased coin simultaneously. Construct the probability distribution where random variable x refers to the number of heads.
Statistics and Probability
Construct the probability distribution if three cellphones were to be tested, consider the random variable (x) as the number of defected cellphones.
Statistics and Probability
Suppose 2 coins are tossed. Let A be the random variable representing the number of heads that occur. Find the probability of each of the values of the random variable A. Create a Histogram of the following set of data
Statistics and Probability
Assume that females have pulse rates that are normally distributed with a mean of 72.0 beats per minute and a standard deviation of 12.5 beats per minute.
if 1 adult female is randomly selected, find the probability that her pulse rate is between 65 beats per minute and 79 beats per minute.
if 1 adult female is randomly selected, find the probability that her pulse rate is between 65 beats per minute and 79 beats per minute.
Statistics and Probability
In a study, you would like to determine whether students at DAHU eat healthy food. You
interviewed 20 students that were randomly selected from each education level as follows:
- 6 freshman students
- 5 sophomore students
- 5 junior students
- 4 senior students
You asked the selected students the following question:
On average, how many fruits you eat per day?
A. None
B. One fruit
C. Two fruits
1. Describe the population in the study.
2. Describe the sample in the study.
3. Discuss the sampling method used in the study.
4. Discuss one advantage and one disadvantage of the sampling method used.
5. Discuss the data collection method used in this study.
6. Discuss one advantage and one disadvantage of the data collection method used.
7. Discuss the research design used in the study.
8. List the variable(s) in this study.
9. Discuss the measurement level of each variable.
10. Construct the appropriate frequency table.
interviewed 20 students that were randomly selected from each education level as follows:
- 6 freshman students
- 5 sophomore students
- 5 junior students
- 4 senior students
You asked the selected students the following question:
On average, how many fruits you eat per day?
A. None
B. One fruit
C. Two fruits
1. Describe the population in the study.
2. Describe the sample in the study.
3. Discuss the sampling method used in the study.
4. Discuss one advantage and one disadvantage of the sampling method used.
5. Discuss the data collection method used in this study.
6. Discuss one advantage and one disadvantage of the data collection method used.
7. Discuss the research design used in the study.
8. List the variable(s) in this study.
9. Discuss the measurement level of each variable.
10. Construct the appropriate frequency table.
Statistics and Probability
A _____________________ probability of an outcome is a probability obtained on the basis of personal judgement.
Statistics and Probability
Observe your school, the community or your home. Identify possible problem that is present in your observation and practice solving the problem by filling in the blank. Make it more numerical in nature using the terms frequencies, number of times, how often, etc.
A. What is the observation?
B.What is the problem?
C.Provide three (3) possible solutions to solve the problem?
1.)
2.)
3.)
D. What are the possible result of the three (3) possible solutions?
1.)
2.)
3.)
E. Which among the solutions has the best result and Why?
A. What is the observation?
B.What is the problem?
C.Provide three (3) possible solutions to solve the problem?
1.)
2.)
3.)
D. What are the possible result of the three (3) possible solutions?
1.)
2.)
3.)
E. Which among the solutions has the best result and Why?
Statistics and Probability
Customers at TAB are charged for the amount of salad the take. Sampling suggests that the
amount of salad taken is uniformly distributed between 5 ounces and 15 ounces. Let
Χ = Salad plate filling weight.
i. Find the probability density function of Χ
ii. What is the probability that a customer will take between 12 and 15 ounces of salad?
iii. What is the probability that a customer will take fewer than 5 ounces of salad.
iv. Find Ε(Χ) and Var (Χ)
amount of salad taken is uniformly distributed between 5 ounces and 15 ounces. Let
Χ = Salad plate filling weight.
i. Find the probability density function of Χ
ii. What is the probability that a customer will take between 12 and 15 ounces of salad?
iii. What is the probability that a customer will take fewer than 5 ounces of salad.
iv. Find Ε(Χ) and Var (Χ)
Statistics and Probability
CFL bulb of a certain make have a mean life of 800 hours with S.d. of 150 hours. Out of 50 thousand bulbs of that make used for street lighting, how many of them would fuse in first 650 hours, if the distribution of the life of bulbs is assumed to be normal? How Many bulbs would be burning after 950 hours?
