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Determine the area under the standard normal curve for the following:
Determine P- Value. Make a decision at 0.01 sig level. Write down conclusion in complete sentences in terms of problem
Among students 70% own a car, 50% own a bike and 40% own both. Determine a probability that randomly chosen student own the least one of above vehicles.
You are planning evaluation of semester-long alcohol awareness campaign at your college. Previous evaluations point out that about 25% of the students surveyed will respond "Yes" to the question "Di
In a survey of 1430 undergraduate students, 1087 reported that they had one or more credit cards. Provide a 95% confidence interval for the proportion of all college students who have at least one c
Consider the binomial setting with n=60. You are testing the null hypothesis that p=0.4 versus the two-sided alternative with a 5% chance or rejecting the null hypothesis when it is true.
Suggest binomial setting with n=60. You're testing the null hypothesis that p=0.4 versus two-sided alternative with a 5% chance or rejecting null hypothesis when it is true.
Discuss the potential problem of the following study and propose an alternative way to prevent the problem.
Describe the potential problem of the following study and propose alternative way to prevent the problem.
If the sample results show that 52 of the workers belonged to unions, what is the sample proportion of workers belonging to unions (to 2 decimals)? Complete the following, assuming an a level of .05
A scientist was interested in determining if students eating habits change as they go through college. One hundred randomly selected students were asked before they entered college if they would con
A scientist claims that only 68% of geese fly south for winter. He tags 65 random geese in summer and finds out that 18 of them don't fly south in the winter. if a=.05 is scientists belief warrented
A University of Florida study upon drinking habits asks random sample of students if they drink any alcohol when they party. We want to extend the results to all students at university. In this prob
The issue of capital punishment is hotly debated topic. Do more Republicans than Democrats support capital punishment? A researcher randomly chooses 100 republicans and 100 democrats and asks them i
In the group(2) that doesn't eat strawberries regularly, we find out that 5 out of 1000 get lung cancer. Determine the sample relative risk?
Which of the following isn't a binomial distribution and why? Justify your answer.
X is normally distributed with the mean 12 and standard deviation 4. Determine the probability that X will be more than 10.
Which of the following isn't true with respect to the residuals in a least squares linear regression?
A sociologist claims that success of students in college (measured by their GPA) is related to their family's income. For sample of 20 students. The coefficient of correlation is 0.40. Describe all
Horse race time is found to be normally distributed with mean value of 10 minutes and standard deviation of 2 minutes. Horses who race time is in top 5% will not be eligible to participate in second
The probability that airplane engine will fail in transcontinental flight is 0.002. Supposing that engine failures are independent of each other, determine the probability that on certain transconti
A biology quiz consists of eight multiple-choice questions. Five should be answered correctly to receive passing grade. If each question has five possible answers, of which only one is correct, what
State University has no honors English course but instead places all freshman scoring at least 60 on proficiency exam (mean=50, standard deviation=10) in advanced composition course.
Patients with breast cancer sometimes die for other reasons. In a Nurses' Health study, women with breast cancer were followed for 10 years and 2.5% had incidence of heart disease. Suppose the basel
If X is the normal random variable with standard deviation 4.00, and if the probability that X is more than 5.52 is .1271 (as shown below), then what is the mean of X? (Note: the diagram is not nece