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BU6015 - Business Analytics

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The null hypothesis states a potential result (or relationship) that the business analyst expects.
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Based on these regression results from Lab 5.1 Excel, Evaluating the Relationship Between Sales and R&D Expenditures, how much of the variance in sales revenue is explained by R&D expenditures?

Under regression statistics, the following values are shown: Multiple R, 0.686491894. R square, 0.471271121. Adjusted R square, 0.466283113. Standard error, 7400410.253. Observations, 108. In the ANOVA table at the center, values are shown as follows: Regression: d f, 1. S S, 5.17434E +15. M S, 5.17434E +15. F, 94.48082. Significance F, 2.39098 E minus 16. Residual: d f, 106. S S, 5.0852E + 15. M S, 5.47661E +13. Total: d f, 107. S S, 1.09795E + 16. In the table at the bottom, the entries are shown as follows: Intercept: Coefficients, 7387039.008. Standard error, 2527280.247. t Stat, 2.922920406. P value, 0.00424. Lower 95 percent, 2376460.11. R and D expenditures: Coefficients, 9.281064367. Standard error, 0.954829777. t Stat, 9.720124558. P value, 2.39E minus 16. Lower 95 percent, 7.388021465.

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A new business, CoolIT, sells items to keep you cool when outside. Its products include coolers, generators, floats, and other water accessories designed to beat the heat. It opened the store at the beginning of June. Management has asked the following question: Is the average sale during the first 100 days of business different than the average sale during the second 100 days of business? A business analyst used the Excel Data Analysis ToolPak to create the following hypothesis test. Assuming alpha equals 5% (0.05), what is the p-value of the t Stat?

The table titled t-test: two-sample assuming unequal variances contains 3 columns and 11 rows. The headings of columns 2 and 3 are as follows: first 100 sales; second 100 sales. The row entries are as follows: row 2 - mean; 624.0999; 584.6295. Row 3 - variance; 565742.2231; 667136.4119. Row 4 - observations; 100; 100. Row 5 - hypothesized mean difference; 0; blank. Row 6 - d f; 197; blank. Row 7 - t stat; 0.355476884; blank. Row 8 - P(T=t) one-tail; 0.361306344; blank. Row 9 - t critical one-tail; 1.652625219; blank. Row 10 - P(T=t) two-tail; 0.722612687; blank. Row 11 - t critical two-tail; 1.972079034; blank.

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What is the presentation of data or information in easy-to-read pictorial or graphic formats with minimal text?
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________ looks for underlying patterns in the data by examining the data at a more detailed level in order to examine potential correlations.

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What would be a possible dependent variable in a regression determining “How do lenders set interest rates paid by borrowers?” for a lender?

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If there are 60 return transactions and 150 sales transactions in a month, what is the proportion of return transactions to all monthly transactions?

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A new business, CoolIT, sells items to keep you cool when outside. Its products include coolers, generators, floats, and other water accessories designed to beat the heat. It opened the store at the beginning of June. Management has asked the following question: Is the average sale during the first 100 days of business different than the average sale during the second 100 days of business? A business analyst used the Excel Data Analysis ToolPak to create the following hypothesis test. Should the business analyst conduct a one-tailed or two-tailed hypothesis test to evaluate management’s question?

The table titled t-test: two-sample assuming unequal variances contains 3 columns and 11 rows. The headings of columns 2 and 3 are as follows: first 100 sales; second 100 sales. The row entries are as follows: row 2 - mean; 624.0999; 584.6295. Row 3 - variance; 565742.2231; 667136.4119. Row 4 - observations; 100; 100. Row 5 - hypothesized mean difference; 0; blank. Row 6 - d f; 197; blank. Row 7 - t stat; 0.355476884; blank. Row 8 - P(T=t) one-tail; 0.361306344; blank. Row 9 - t critical one-tail; 1.652625219; blank. Row 10 - P(T=t) two-tail; 0.722612687; blank. Row 11 - t critical two-tail; 1.972079034; blank.

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Which numerical data type has an absolute zero?

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What term refers to the willingness and ability to specify business questions, extract high quality data, analyze the data and report the results?

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