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The annual rainfall in a certain region is approximately normally distributed with mean 41.3 inches and standard deviation 5.8 inches. Round answers to the nearest tenth of a percent.
a) What percentage of years will have an annual rainfall of less than 43 inches? %
b) What percentage of years will have an annual rainfall of more than 39 inches? %
c) What percentage of years will have an annual rainfall of between 37 inches and 42 inches? %
the following frequency distribution presents a set of exam scores for a class of n 20 students.x f
A manager wishes to find out whether there is a relationship between the number of radio ads aired per week and the amount of sales of a product. the data for the sample are shown below?
Marentette and El-Masri (2011) used logistic regression to identify predictors of obtaining seasonal influenza vaccination among hospital-based nurses in Canada. Their results are shown in table 1:
Instructions and Background This assignment requires students to identify, discuss and evaluate potential data collection, analysis and reporting strategies for dealing with small sample data. Research Scenario The intended research design was a R..
In an early study, researchers at an Ivy University found that 33% of the freshmen had received at least one A in their first semester.
The equation for converting a temperature from x = degrees Celsius to y = degrees Fahrenheit is y = 32 + 1.8x. Does this equation describe a statistical relationship or a deterministic relationship? Briefly explain your answer.
Suppose that, when taking a random sample of 4 from 123 women, you get a mean height of only 60 inches (5 feet). The procedure may have been biased.
What is the probability of finding the disease in at least 15 people? what is the probability of finding the disease in fewer than 5 people?
Find a 95% confidence interval for the true proportion of boys participating in a high school sport.- Find a 95% confidence interval for the true proportion of girls participating in a high school sport.
The statistics showed that students studied an average of 20 hours per week with a standard deviation of 10 hours. What is the probability that a sample mean would exceed 20 hours per week?
Suppose that after five years, the probability the height is more than 86 cm is 0.0718. Find the mean height after five years.
How do we use a least squares regression line? What is the range for the coefficient of determination?
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