The life expectancy in Africa is 74 with a standard deviation of 8 years. A random...
The life expectancy in Africa is 74 with a standard deviation of 8 years. A random sample of 49 individuals is selected.
1.What is the probability that the sample mean will be between 73.5 and 76 years?
2.What is the probability that the sample mean will be larger than 77
3.What is the probability that the sample mean will be less than 72.7 years?
Homework Answers
Add Answer to:
The life expectancy in Africa is 74 with a standard deviation of
8 years. A random...
The life expectancy in the United States is 75 with a standard deviation of 7 years....
The life expectancy in the United States is 75 with a standard deviation of 7 years. A random sample of 49 individuals is selected. Round all probabilities to four decimal places. What is the probability that the sample mean will be larger than 77 years? Answer What is the probability that the sample mean will be within 1 year of the population mean? What is the probability that the sample mean will be within 2.5 years of the population mean?
A recent study found that the average life expectancy of a person living in Africa is...
A recent study found that the average life expectancy of a person living in Africa is 53 years with a standard deviation of 7.5 years. If a group of 40 people were selected at random, the probability that their mean life expectancy is less than 55 is?
7. The average life expectancy of dishwashers produced by a company is 8 years with a standard deviation of 6 month...
7. The average life expectancy of dishwashers produced by a company is 8 years with a standard deviation of 6 months. Assume that the lives of dishwashers are normally distributed. a. What is the probability that a randomly selected dishwasher will have a life expectancy of at least 7 years? b. Dishwashers that fail operating in less than 4 1/2 years will be replaced free of charge. What percent of dishwashers are expected to be replaced free of charge? c....
answer neatly and correctly please! According to the historical data, the life expectancy in Belgium is...
answer neatly and correctly
please!
According to the historical data, the life expectancy in Belgium is less than the life expectancy in the United States. A new study has been made to see whether this has changed. Records of 220 individuals from Belgium who died recently are selected at random. The 220 individuals lived a mean of 78.3 years with a standard deviation of 7.1 years. Records of 225 individuals from the United States who died recently are selected at...
Insurance Companies track life expectancy information to assist in determing the cost of life insurance policies....
Insurance Companies track life expectancy information to assist in determing the cost of life insurance policies. Last year the average life expectancy of all policy holders was 77 years. ABI Insurance wants to determine if their clients now have a longer life expectancy, on average, so they randomly sample some of their recently paid policies. The ages of the clients in the sample are shown below. 86 75 83 84 81 77 78 79 79 81 76 85 70 76...
3. The life expectancy of computer terminals is normally distributed with a mean of 5.2 years...
3. The life expectancy of computer terminals is normally distributed with a mean of 5.2 years and a standard deviation of 8 months (2/3 years). Please answer the following questions. (a) What is the probability that a randomly selected terminal will last more than 6 years? (b) What percentage of terminals will last between 3.5 and 5.5 years?
A normal population has a mean of 75 and a standard deviation of 5. You select...
A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Use Appendix B1 for the z values Compute the probability that the sample mean is: (Round the zvalues to 2 decimal places and the final answers to 4 decimal places.) a. Less than 74 Probability 09 b. Between 74 and 76. Probability c. Between 76 and 77 Probability d. Greater than 77 Probability Not > 3 of 4 < Prey...
6. Insurance companies track life expectancy information to assist in determining the cost of life insurance...
6. Insurance companies track life expectancy information to assist in determining the cost of life insurance policies. They want to know if their clients this year have a longer life expectancy, on average, so the company randomly sampled 20 policyholders to see if the mean life expectancy of policyholders has increased. The mean life expectancy for the random sample was 78.6 years with a sample standard deviation of 5.12 years. The insurance company will only change their premium structure if...
A dishwasher has a mean life of 12 years with an estimated standard deviation of 1.25...
A dishwasher has a mean life of 12 years with an estimated standard deviation of 1.25 years "Appliance life expectancy," 2013). Assume the life of a dishwasher is normally distributed. a.) True or False: The random variable x defines the life expectancy of a dishwasher b.) Find the probability that a dishwasher will last more than 15 years. c.) Find the probability that a dishwasher will last less than 8 years. d.) Find the probability that a dishwasher will last...
Please answer neatly and correctly! According to the historical data, the life expectancy in the United...
Please answer neatly and correctly!
According to the historical data, the life expectancy in the United States is less than or equal to the life expectancy in Ireland. A new study has been made to see whether this has changed. Records of 290 individuals from the United States who died recently are selected at random. The 290 individuals lived an average of 77.8 years with a standard deviation of 7.8 years. Records of 205 individuals from Ireland who died recently...
7. The average life expectancy of dishwashers produced by a company is 8 years with a standard deviation of 6 months. Assume that the lives of dishwashers are normally distributed. a. What is the probability that a randomly selected dishwasher will have a life expectancy of at least 7 years? b. Dishwashers that fail operating in less than 4 1/2 years will be replaced free of charge. What percent of dishwashers are expected to be replaced free of charge? c....
answer neatly and correctly
please!
According to the historical data, the life expectancy in Belgium is less than the life expectancy in the United States. A new study has been made to see whether this has changed. Records of 220 individuals from Belgium who died recently are selected at random. The 220 individuals lived a mean of 78.3 years with a standard deviation of 7.1 years. Records of 225 individuals from the United States who died recently are selected at...
A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Use Appendix B1 for the z values Compute the probability that the sample mean is: (Round the zvalues to 2 decimal places and the final answers to 4 decimal places.) a. Less than 74 Probability 09 b. Between 74 and 76. Probability c. Between 76 and 77 Probability d. Greater than 77 Probability Not > 3 of 4 < Prey...
6. Insurance companies track life expectancy information to assist in determining the cost of life insurance policies. They want to know if their clients this year have a longer life expectancy, on average, so the company randomly sampled 20 policyholders to see if the mean life expectancy of policyholders has increased. The mean life expectancy for the random sample was 78.6 years with a sample standard deviation of 5.12 years. The insurance company will only change their premium structure if...
A dishwasher has a mean life of 12 years with an estimated standard deviation of 1.25 years "Appliance life expectancy," 2013). Assume the life of a dishwasher is normally distributed. a.) True or False: The random variable x defines the life expectancy of a dishwasher b.) Find the probability that a dishwasher will last more than 15 years. c.) Find the probability that a dishwasher will last less than 8 years. d.) Find the probability that a dishwasher will last...
Please answer neatly and correctly!
According to the historical data, the life expectancy in the United States is less than or equal to the life expectancy in Ireland. A new study has been made to see whether this has changed. Records of 290 individuals from the United States who died recently are selected at random. The 290 individuals lived an average of 77.8 years with a standard deviation of 7.8 years. Records of 205 individuals from Ireland who died recently...
Most questions answered within 3 hours.
-
From the literature (reference your sources): What are the
lattice parameters of calcite and aragonite? Why...
asked 30 minutes ago -
Your system is rejecting the question am asking which is
preceded by a case study. It...
asked 35 minutes ago -
3. On January 2, 2000, Larry creates a trust with himself as
trustee. Larry as trustee...
asked 32 minutes ago -
A member of the volleyball team spikes the ball. During this
process, she changes the velocity...
asked 39 minutes ago -
Are adult gamers less likely to use a gaming console (Xbox,
PlayStation, Wii, etc...) than teen...
asked 1 hour ago -
The University of
Texas recently reported that 43% of college students aged 18-24
would spend their...
asked 1 hour ago -
The length of stay at a specific emergency department in
Phoenix, Arizona, in 2009 had a...
asked 59 minutes ago -
. Please give the mechanism for this type of problem. Step by
Step
The toxin that...
asked 1 hour ago -
If you have a 1M stock solution and you want to dilute 1 :10
with water,...
asked 1 hour ago -
In a load instruction, the effective address is obtained by
A) Retriving the address from a...
asked 1 hour ago -
Use the following information to answer this question.
Windswept, Inc. 2017 Income Statement ($ in millions)...
asked 1 hour ago -
A mutual fund salesperson has arranged to call on four people
tomorrow. Based on past experience...
asked 1 hour ago