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Are Americans more deeply in debt this year compared to last year? To help answer this question, a statistics practitioner randomly sampled Americans this year and last year. The sampling was conducted so that the samples were matched by the age of the head of the household. For each, the ratio of debt payments to household income was recorded. Can we infer that the ratios are higher this year than last? Use 5% significance level.
Also, please show steps using excel or by hand on how to find if this is a right tailed T-test, how to find the hypothesized mean difference, t stat, and p-vale.
In healthy adults, x is approximately normally distributed with mean µ = 38 and standard deviation σ = 12. What is the probability that:
Four percent of the customers of a store buy cigars. Half of the customers who buy cigars buy beer and one fourth of those who buy beer buy cigars. The table is given below:
For these 4 questions below what would be the independent and dependent variables, the level of measurement and whether or not the variable is discrete or continuous.
a sample of 21 of 180 funded projects revealed that 19 were valued at 17680 each and 2 were valued at 20320 each. from
At 95% level of confidence, can we conclude that the babies using the Gibbs product gained less weight?
Recognize the midpoint of the first class. Recognize the class boundaries of the first class.
At the 0.05 level of significance, is there sufficient reason to believe that the integers are not being generated uniformly?
a study was done on the propagation of an ultrasonic stress wave through a substance. in particular attenuation in
question an opportunity sample of 50 undergraduate students was asked to complete a series of personality
Two groups were polled about their attitudes towards capital punishment. In one group 30 out of 100 favored capital punishment, and in the other group 40 out of 80 favored capital punishment. Calculate an appropriate test value to test the hypothesis..
How do you find the z-score corresponding to a score of X = 100 for the distributions given below? How do you know what direction they are going?
the mean cleanup and redecorating time for one-bedroom student apartment at campus housing is 16 hours. the time for
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