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Q1) In recent years, scores on standardized test for high school students with 3.5 to 4.0 grade point average were normally distributed, with mean of 39.9 and a standard deviation of 1.8. A student with a 3.5 to 4 grade point average who took standardized test is randomly selected.
a) Determine the probability that students test score is less than 36
b) Determine the probability that students test score is less than 36.6 and 43.2
c) Determine the probability that students test score is more than 41.6
Q2) Assume that you bought (randomly select) 3 laptops from production run of 10 laptops. Of the 10 laptops, 9 are destined to last at least two years without needing single repair. Determine the probability that all three of your laptops will last at least two years without needing single repair?
Discuss whether the percent distribution of the cross-tab and chi-square supports/does not support the researcher's hypothesis.
Compute the effect size with gender as the grouping variable and ADDSC as the dependent variable.
The point estimate for the difference between the proportions is:
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The lengths of pins produced by a machine follow a normal distribution with mean 2.54 cm and standard derivation 0.04 cm.
Determine and report the within-group slope which relates Y to Xc (for this, you will have to look at your regression printout).
Two letters are chosen at random without replacement from word statistical. Determine the probability that both letters are s?
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
Use MegaStat's output for simple linear regression to determine the regression equation
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Find the probability that in a given month:
The number of standard errors that the sample estimate (p 1 - p 2 ) of (p1 - p2) falls from its null hypothesis value of zero is called
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