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Advance statistics and quality improvement
A company of cell phones want to know if the age Is affecting the number of minute used per day. Using and alpha of 5% determine is the humidity affects the rate of production?
Minutes
Kids
Adolescent
Adult
Over 60
20
200
90
30
399
120
50
40
300
397
130
Suppose that a certain college class contains 45 students. Of these, 26 are sophomores, 25 are chemistry majors, and 7 are neither. A student is selected at random from the class.
test the hypothesis using the classical approach and the p-value approach.ho p 0.45 versus hi p lt 0.45n 150 x 62 a
question while attending a sales meeting you were asked about the relationship between sales calls and actual sales
imagine that a student takes a 20-item multiple choice exam. she didnt study so all of her answers are guesses. each
Based on this sample, is Moe correct in his assertion? Write up formal commentary of results of your test.
Scores ranged from 0 to 40 with higher scores reflecting greater computer anxiety. This variable was measured on the interval scale. The researcher analyzed the data using what t test?
At least half the patients are under 15 years old? First, describe how this can be modelled as a binomial distribution with 8 trials, where success is visitor age is under 15 years old and the probability of success is 20 percent.
Two independent samples of sizes 16 and 26 were taken. In a test of equality of population means of the two samples, how many degrees of freedom are associated with the critical t-value?
Create a bar chart with an appropriate vertical axis, horizontal axis, and title - what your final chart should look like, although your titles and numbers will be different. Remove my example and insert your own.
A firm plans to hire 100 employees during the year. It expects that 25 of these employees will obtain graduate degrees within the next 5 years of being hired.
Find the marginal probabilities, are Disney and Amazon stock returns independent and what is the mean and variance of the stocks D and A?
Shoveling Heart Rates Because cardiac deaths appear to increase after heavy snowfalls, an experiment was designed to compare cardiac demands of snow shoveling to those of using an electric snow thrower.
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