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In order to determine the summer unemployment rate among college students, a pilot sample was taken; and it was determined that fifteen percent of the individuals in the sample were unemployed. Using the results of the pilot study and a 95% confidence, what size sample would be required to estimate the proportion of unemployed college students if we want the margin of error not to exceed 5 percent?
If the interval of time between the eruptions is normally distributed with a standard deviation of 29 minutes, what is the probability that a randomly selected time interval between eruptions is longer than 96 minutes?
If random samples, each with n = 4 scores, are selected from a normal population with MK = 80 and o=10
A consumer organization wants to know if there is a difference in the price of a particular toy at three different types of stores. The price of the toy was checked in a sample of five discount toy stores, five variety stores
Illustrate what can we say about the probability distribution. Is it approximately normal, elucidate the mean and standard deviation.
Using ANOVA, determine if there is a significant difference in the six year graduation rate by type.
Think of a case in which regression analysis was used, but not properly. For instance, discuss situations in which regression analysis is not appropriate and does not add useful information to our understanding of a set of data.
Registration process takes, on average, 2 minutes per patient. Among patients who get prescriptions, average time spent with doctor is 5 minutes. Among those admitted to hospital, average time is 30 minutes.
one class of 40 students complain that they were harshly graded in the examination as l0 students received A or B ; 17 received a C ; and the rest received a D or lower. QUESTION: Is the class's complain about harsher grading justified? ( use a : 0..
20% of their income tax returns are audited. Of five randomly chosen individuals, what is the probability that none will have their returns audited?
What is the correlation between student cumulative GPA and the numbers of hours spent on school work each week? Be sure to include the computations.
Determine the 95 percent confidence interval and the 95 percent prediction interval for the selling price of a home with 2,200 square feet.
Hugger Polls contends that an agent conducts a mean of 53 in-depth home surveys every week. A streamlined survey form has been introduced, and Hugger wants to evaluate its effectiveness.
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