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Assume that blood pressure readings have a mean of 120 and a standard deviation of 8. If 100 people are randomly selected, find the probability that their mean blood pressure will be greater than 1
The demand for a product of Carolina Industries varies greatly from month to month. Based on the past 2 years of data, the following probability distribution shows the company's monthly demand.
The true mean chloride level of all healthy Washington residents. What is the lower limit of the 90% confidence interval? what is the upper limit of the 90% confidence interval?
What would be the mean of the number of customers who buy specialty clothes for their pet each day? What is the standard deviation for the sample proportion?
Explain what a 90% confidence interval would mean with this sample. Based on the sample size, and what is being studied, what type of distribution would be most appropriate.
If two televisions are randomly selected, compute the probability that both televisions work. What is the probability at least one does not work?
The lifetime of a particular product made by a company is Normally distributed with a mean of 4 years and a standard deviation of 1.6 years. The company offers a warranty of 1 year for the product.
If we assume that the monthly rents for apartments on the east side are normally distributed, is there enough evidence to conclude, at the .05 level of significance, that is less than $675 ?
If the contents in the population of all cans follow a normal distribution, what is the probability that the mean contents of a six-pack are less than 12 oz?
if 2% of the bolts manufactured by a company are defective, what is the probability that in a sample of 200 bolts ;
If random samples of 36 download times are selected, what is the probability that the sample mean will be less than 0.84 seconds?
A local fast food restaurant in Oregon (no sales tax) fries, soda, hamburger, cherry pie, sundaes cost $1 each. Chicken sandwiches cost $2 each. You have five dollars. How many meals can you order:
A company manufactures batteries in batches of 9 and there is a 3% rate of defects. Find the variance for the number of defects per batch.
What is the probability that the person will be the last to leave the bank assuming no other customers arrive? Explain your answer fully.
You are tracking the sales of three tires. Using the binomial distribution formula, what is the probability that at least one will need a repair?
Bags of a certain brand of tortilla chips claim to have a net weight of 14 oz. Net weights actually vary slightly from bag to bag. Assume net weights are normally distributed.
Phone calls arrive at the rate of 25 per hour at the reservation desk. Compute the probability of receiving 10 calls or more in 5 minutes.
Historical data suggests a standard deviation in the first sample of 10 and a standard deviation in the second sample of 16. Find a 95% confidence interval for the population difference.
A major hurricane IS hurricane with wind sped of 111 mile per hour or greater. during 20 century the mean of major hurricanes to strike the us mainland per year was about 0.6. find probabilty that i
The manufacturer of a certain brand of light bulb claim that the variance of the lives of these bulb is 4200 square hours. Make the 99% confidence intervals for the variance and standard deviation of
Average undergraduate cost for tuition, fees, room and board for all institutions in 2007 was $19,410. A random sample of costs in 2008 for 40 institutions indicated that the sample mean was $22,098
If your particular class has an average of 89, can you conclude that your class is better than average at the 90 percent confidence level? Label and describe each step of the hypothesis testing proc
determine (a) the 90% confidence limits, and (b) the 97% confidence limits for an estimate of the mean diameter of all the rivets produced by the machine in a day
A study of 200 computer service firms revealed these incomes after taxes. What is the probability that a particular firm selected has $1 million or more in income after taxes?
Based on the attached data from the U.S. Department of Agriculture, explore the relationship between the number of farms (X) and the average size of a farm (Y) in the United States between 1950 and