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A random sample was taken of 300 undergraduate students from a university. The students in the sample were classi?ed according to their gender and according to the choice of their major. The result is given in the following table.
College
Gender
Arts and sciences
Engineering
Business
Other
Total
Male
75
40
24
66
205
Female
45
12
15
23
95
120
52
39
89
300
Test the hypothesis that the choice of the major by undergraduate students in this university is independent of their gender. Use α = 0.01.
This linear regression model was fitted to a sample of size 50 to produce the following regression equation: yhat = 145 + 1.2x1 + 300x2.
carter motor company claims that its new sedan the libra will average better than 21 miles per gallon in the city.
he standard deviation of the sample proprortion is 5.3%. How large a sample (to the nearest person) would be required to reduce this standard deviation to 3.7%?
Determine which statistical technique you will employ to measure the quality characteristics of your organization. Provide examples to support the rationale.
provide two data setsa. construct a scatterplotb. find the value of the linear correlation coefficient r then determine
Run simulation using Oracle crystal ball
using the simple random sample of weights of women from a data set we obtain these sample statistics n40 and x146.82
A sample of 60 night-shift workers showed that the mean number of units produced was 351. At the .05 significance level, is the number of units produced on the night shift larger?
How would you choose an appropriate level of significance for your statistical test? What are the possible outcomes and limitations or your statistical test?
For the following frequency distribution:
Suppose that we observe a random sample size n from a normally distributed population. If we are able to reject H0:µ = µ in favor of a two-tailed alternative hypothesis at the 10% significant level
The waiting times have a standard deviation of 4.9 minutes. Use a 0.025 significance level to test the claim that with a single line, waiting times vary less than with individual lines.
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