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The table below shows the scores of a group of 15 students in mathematics and art:
Student Math Art
1 22 53
2 37 68
3 36 42
4 38 49
5 42 51
6 58 65
7 58 51
8 60 71
9 62 62
10 65 65
11 66 66
12 56 56
13 66 66
14 67 67
15 62 65
Determine if the locations of distribution of scores for these students differ significantly for the two subjects. Use the hand calculation method and then use PHStat® or any other software. Compare the results and draw conclusions and recommendations based on those results.
Another day, it took Eric only 12 minutes to get to work. Using the same formula, determine the z value. Is it positive or negative? Explain why it should be positive or negative.
Explain the ANOVA output table values:
At the .05 significance level, can we conclude that there is a difference in their mean times?
The chance both flights are full is 0.6. Are the two flights being full independent events and What was the mean ranking for the females in this class
In order to compare the means of two populations, independent random samples of 484 observations are selected from each population, with the following results:
Compute the sample variance and sample standard deviation as a measure of volatility of monthly total return for Chevron (to 2 decimals): Sample variance and Sample standard deviation.
What score was earned by more students than any other score? Why? What was the highest score earned on the exam?
The new study is going to use the confidence level of 90%. The estimator or appreciative must be in 1% of the population proportion. Which is the necessary size of the sample?
The mean SAT verbal score is 478, with a standard deviation of 98. Use the Empirical Rule to determine what percent of the scores lie between 380 and 478. (Assume the data set has a bell-shaped distribution)
The quality control process at a manufacturing plant requires that each lot of finished units be sampled for defective items. Twenty units from each lot are inspected.
Determine the probability, P(Z
Craft one page brief of the statistical results (include any additional pages needed for any APA tables or graphs and the SPSS syntax and output) in which you do the following:
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