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In an effort to improve the vocabulary of 10 students, a teacher provides a weekly 1-hour tutoring session for them. A pre-test is given before the sessions and a post-test is given afterwards. The results are show in the table. at alpha .01, can the teacher conclude that the tutoring sessions helped improve the students' vocabularies?
Student 1 2 3 4 5 6 7 8 9 10
Before X1 83 76 92 64 82 68 70 71 72 63
Before X2 88 82 100 72 81 75 79 68 81 70
the decomposition approach to forecasting may be helpful when attempting to forecast a time-series. could an analogous
Sample mean of $14.68 per hour. Assuming the population standard deviation of σ = $145, can we conclude that an increase occurred in the mean hourly earnings since 2001? Use α = .05.
Based on its position in the periodic table of the elements, which pure element would also react violently with oxygen and water?
Salary information for a random sample of male and female employees of a large company is shown below.
what type of anova would examine effects of political party e.g. democrat republican or independent affiliation and
In a binomial distribution n = 8 and π = 0.2. Determine the probabilities of the following events.
A study was done on the accuracy of advertisements by the five types of electronics stores in a city. On each of the six days, items were randomly selected from the advertisements for each type of store and the actual price was compared to the adv..
An advertising agency that serves a major radio station wants to estimate the mean amount of time that the station's audience spends listening to the radio daily. From past studies, the standard deviation is estimated as 45 minutes.
Formulate a linear programming model for this problem.
only 3 reported that their health was excellent. Find the probability that when 13 adults are randomly selected, 3 or fewer are in excellent health.
steve and his friends are relaxing at a local tavern. the number of drinks that steves table receives is poisson
Describe the factors that might cause variation in weight of Tootsie Rolls during manufacture.
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