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Use the Standard Normal Distribution Table for reference "Standard Normal Distribution Table" 1.
Student English Test Grade z-Score Student Math Test Grade z-Score John 82 Jim 81 Julie 88 Jordan 85 Samuel 90 Saye 79 Tonya 86 Lisa 82 Mean 86.50 81.75 St. Dev. 3.42 2.50
2.Draw a curve and shade the area between z = -1.15 and z = -1.35. Find the area associated with this section of the curve. 3.Draw a curve and shade the area between z = -.35 and z = .35. Find the area associated with this section of the curve. 4.Draw a curve and shade the area between z = 1.05 and z = 1.55. Find the area associated with this section of the curve. 5.Draw a curve and shade the area beyond z = 1.30. Find the area of the curve associated with this section of the curve. Step 2
To test the effectiveness of a new type of plastic handcuffs, a law enforcement agency puts the cuffs on a sample of 30 persons who belong to the local weightlifting club. None is capable to break free from the cuffs. What type of sampling techniq..
Construct a 95 percent confidence interval for the population proportion of positive drug tests. Why is the normality assumption not a problem, despite the very small value of p?
Out of 1000 respondents to a survey, 250 people planned to purchase a TV of which 200 actually purchased and 50 did not actually purchase. 750 people did not plan to purchase at TV, of which 100 actually purchased and 650 did not actually purchase.
Critically discuss the assumptions, if any, regarding a Chi-square test? What are the assumptions to apply linear regression?
Using the confidence interval when conducting a two-tail test for the population mean we do not reject the null hypothesis if the hypothesized value for:
According to a report produced by the New South Wales Ministry of Health, 46% of hospitalisations occur in people aged sixty years and over (60+).
If writing scores for population have standard deviation of σ = 20, does sample give adequate evidence to conclude that new composition course has significant effect?
If the data produce a t statistic of t = 2.50, then which of the following is the correct decision for a two-tailed hypothesis test?
According to a recently conducted survey, 90% of all drivers in Trinidad and Tobago claim to consistently driver over the legal speed limit.
Can the president conclude that the average family income at his school is significantly different than the population mean family income of the reported university?
A sample of eight bottles is selected and the number of ounces of soda in each bottle is given below. At a= 0.05, can we reject the claim that the machine is functioning properly?
Assuming that the distribution of the costs is normal, what is the probability that the average for this sample is between $400 and $425?
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