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Use a normal curve to estimate the probability that the average age of the houses receiving the brochure is greater than 45 years.
The height of a building is measured 32 times. The average of the measurements is 206 feet, with standard deviation=1.8 feet. Find a 95% confidence interval for the true height of the building.
Find a 95% confidence interval for the average amount spent by all City College students on Black Friday. Find a 90% confidence interval for the percentage of all City College students who made at le
A company is criticized because only 17 of 48 executives at a local branch are women. the company explains that although this proportion is lower than it might wish, it's not a surprising value give
Discuss the various sampling methods we might use in determining which items to include in a sample?
What is the probability of getting no claims over $100 in a given day? What is the probability of getting at most two claims over $100 in a given day?
What is the Taguchi constant for a device that costs $400 to repair and a tolerance of plus or minus 0.5 mm with a mean squared deviation from the target of 0.3?
What are the basic assumptions underlying multiple means test, and why do they matter?
The national freshman-to-sophomore retention rate has held steady at 74%. A certain college has 499 of the 585 freshman return as sophomores. Does this college have a right to brag that it has an un
Build a 95% confidence interval for the mean starting salary of all graduates from this college.Interpret your result in words.
X is a normally distributed random variable with mean 10 and variance 24.
John is a student in this class. What is the probability that at least one other student in the class has John's birthday (Day and month, but not necessarily the year)? What is the probability that,
The allowed fee for wedding services is $425. One ceremony provider is suspected of charging more than the allowed amount. A random sample of 45 weddings produced a mean fee of $455 with a standard
Grain elevators store hundreds of bushels of grain each year that is waiting to be processed. It's critical to control the amount of moisture in the grain so that it does not spoil.
The probability of a successful missile launch is 0.9. Test launches are conducted until 3 successful launches are achieved.
Suppose a birth control pill is 97% effective in preventing pregnancy.
Twenty students agreed to participate in a new type of learning program to increase their typing efficiency. It was accepted that prior to beginning the new learning process their mean was 60 words
A company wants to know how many hours, on the average, it takes an employee to complete a self study course on ethics. A random sample of 100 employees produces an average of 7.9 hours with a stand
The director of the IRS has been flooded with complaints from the ta payers that people must wait more than 45 minutes before seeing an IRS representative.
Reducing fat and saturated fat in your family's diet is important to maintaining heart health and reducing calories. However, fat-free or reduced-fat food choices aren't always low in calories. They
Complete problem 13 on page 54 using SPSS. Copy and paste your SPSS output for 13a and 13b to the word document. For the following carbonated soft drink preference of a 100 college students cola =
Statistical correlation and regression always inspire a certain degree of fascination because they provide a methodology for prediction. These techniques are not magic (and remember always that corr
A sample of Alzheimer's patients is tested to assess the amount of time in stage IV sleep. The number of minutes spent is Stage IV sleep is recorded for a random sample of 61 Alzheimer's patients. T