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Perform an appropriate test of hypothesis to determine if there is evidence, at the .05 level of significance, to support the claim that the mean bone marrow microvessel density is higher before the
A report stated that on average a woman visits her physician 8 times a year. A researcher randomly selects 20 women and obtained these data:
A $1000 deductible with a $580 premium. (A $Y deductible means the insurance company pays X - Y for X >= Y and X for X < Y.) Compute the profit for each policy.
The standard deviation is 20 points. Find the probability that the mean aptitude score for a radomly selecyed group of 150 is between 101.5 and 98.5.
the baggage reached the baggage claim area, with a standard deviation of 9.87 minutes. At the 0.05 level of significance, test the claim that at this airport the mean wait for takeoff is less than t
No claim was made by the company. They took a sample with the above results and want to construct a two-sided 95% confidence interval for the population mean. The upper limit of the confidence inter
A new car that runs on electricity and gasoline is advertised as getting 65 mpg with a standard deviation of 6.9. If you test drive a car, what is the probability that it will get between 50 and 75
In a busy coffee shop, which is a member of an international chain of coffee shops, 40% of customers order a pastry in addition to their drink. If 20 customers were selected at random during one bu
A complete census taken at the university a few years prior indicated a mean age of 22.4 years with a standard deviation of 7.6 years. Test the null hypothesis at the .05 level.
The annual holding cost rate is 28% of the value of the inventory. The per unit cost of finished product is $19. The production rate is constant and equivalent to 60,000 units per year. Determine t
Nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of to . In a recent year, the national mean score for the writing section was , with a standar
Formulate this problem so as to determine how many medical beds and how many surgical beds should be added to maximize revenues. Assume that the hospital is open 365 days a year.
Based on previous studies, researchers believe that 6% of children are born with a gene that is linked to a certain childhood disease. If the researchers test 95- newborns for the presence of this
Door height of 51.6 inches. If average height of men is 69 inches with a standard deviation of 2.8 inches, what height would the doorway have to be to allow 60% of men to enter without bending over?
A random sample of 90 voters found that 38% were going to vote for a certain candidate. Find the 99% limit for the population proportion of voters who will vote for that candidate.
And the rest type AB. Someone volunteers to give blood, what is the probability that this donor has the complement of type O?
Give an example in health care management where you would use probability statistics to determine an outcome such as providing raises based on certain financial goals being met?
What is the probability that a worker pays lees than $1730 per year for the family health coverage premium? What percentage of the workers paid more than $2080 for their family health coverage premium
By comparing z with the critical values in the bottom row of Table C, give two numbers that catch the P-value between them.
In this group of 10 students, what is the mean and variance of the number that were dissatisfied?If, instead, 55% of the students were dissatisfied, what is the probability that at least half of the 1
It is known that 35% of all students in a college are football fans. A sample of 12 students is selected at random. Find the probability that exactly 5 of these 12 students are football fans.
Test the claim that the mean age of people in the United States who would say yes to the survey question shown in the table is 60 years or older. Use a = 0.10 and assume that the population is norm
A false positive result (patient does not have disease) occurs 1% of the time. If a randomly selected individual is positive what is the probability that the individual has the disease?
glucose level in patients free of diabetes are assumed to follow a normal distribution with a mean of 120 and a standard deviation of 16. What is the probability that the mean glucose levels exceeds
The normal distribution, with a mean of $70,000 and a standard deviation of $20,000. A loan application is received this morning. What is the probability?