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A survery of magizine subcribers showed that 45.8 percent rented a car during the past 12 months for business reasons. 54 percent rented a car in the last 12 months for personal reasons and 30 perce
Whitney has STAT 225 office hours every Wednesday from 1:00 pm to 3:00 pm. The following table is the probability mass function for the number of students who stop by for help during Whitney's offic
A certain disease is found in one person in 5000. If a person does have the disease, the test will show a positive result 93% of the time. If a person does not have the disease, the test in 1 out o
Given that a customer did not purchase premium gas, what is the probability that he did not fill his tank? Is type of gas purchased independent of whether a customer fills his tank? Prove your answer
A survey was conducted to learn more abou clarkston university. One part of the survey asked respondentd to indicate wheater thier overall experience at clarkston fell short of expectations, met exp
A pair of fair, six-sided dice are tossed independently of each other. List the sample space of this experiment.
What is the probability that a randomly chosen sequence of upper and lower case letters and digits constitutes a valid password?
There are other inequalities that would also show that A and B are independent, but the most common approach is to use one of the first three given above.
Construct and interpret the corresponding 95% confidence interval for p, the true proportion of beer drinkers who prefered Budweiser to Schlitz.
What is the probability that a new policy holder will have an accident within a year of purchasing a policy? Suppose a new policy holder has an accident within a year of purchasing a policy. What is
Identify the null hypothesis, alternative hypothesis, test statistic, P-vahie, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-vahie method.
Assume that the significance level is a=0.05. use the given information to find the p-value and the critical value(s).
In a test of the effectiveness of garlic for lowering cholesterol, 49 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. T
Use a 0.05 signicance leve to test the claim that this sample is from a population with a mean weight equal to 2.5 g. Do the coins appear to confirm to specifications of the coin mint? Identify the
Approximately 10% of the glass coming off a production line have serious flaws in the glass. If two bottles are randomly selected, find the mean and the variance of the number of bottles that have s
The grading policy says the cut-offs for the other grades correspond to the following: bottom 5% receive F, next 10% receive D, next 40% receive C, and next 30% receive B. These cut-offs are based
A statistics instructor wishes to find out the relationship between the classification of a student and the student's grade in the course. the following is a breakdown of three sections of an introd
The local DQ kept track of the number of paying cuustomers during the noon hour for 100 days. The resulting statistics from their handy-dandy stats-pack-cruncher were as follows: Mean=95, Median=97,
Compute the value of b0 and b1. Find the regression equation. Predict the income rate for an area with an average expense of $75. Computed the coefficient of correlation
A survey found that women's heights are normally distributed with mean 63.9 in and standard deviation 2.2 in. A branch of the military requires women's heights to be between 58 in and 80 in. Find t
If the first quartile, Q1, is computed from the list of all ZIP codes, does the result correspond to the location that is 25% of the distance from the location that is farthest east to the location
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 191 lb. The new population of pilots has normally distributed weights
Alex Hamilton founded Hamilton Marketing Services in 1999 after leaving a major marketing consulting firm in Chicago. Hamilton Marketing Services focuses on small- to medium-sized retail firms and h
The following data the number of car thefts that occurred in a city during the past 12 days.
F(x) = k(1-1/x^2), 1 ? x < 2 is the distribution function for a continuous random variable X. Solve for the value of k and find the probability density function for X