BA Revision

Which of the following data representation methods would best be used to illustrate that 2 variables are uncorrelated?

• Bar Chart

• Component Bar Chart

• Pie Chart

• Scatter Graph

ABC Co. produces 3 main products. Which would be the most appropriate chart or diagram for showing total revenue analyzed into product revenue month by month?

• Multiple Bar Chart

• Pie Chart

• Line Graph

• Component Bar Chart

Which of the following is correct?

• Information can only be extracted from external sources

• Operational information gives details of long-term plans only

• Qualitative data is generally non-numerical information

• Quantitative data is always accurate

Which of the following is not a typical problem that organizations may face when dealing with big data?

• A lack of skills in the labor pool relating to the handling of big data

• Legal and privacy issues if data is held about individuals

• Measurement of metrics that have no use to the organization

• Inability to monitor information from social media sites

An inflation index and index numbers of XYZ's sales ($) for the last year are given below. Which of the following statements relate to 'real' sales, i.e. adjusted for inflation?

Quarter: 1 2 3 4

Sales ($) index: 109 120 132 145

Inflation index 100 110 121 133

• Approximately constant keeping up with inflation

• Growing steadily and not keeping up with inflation

• Growing steadily and keeping ahead of inflation

• Falling steadily and not keeping up with inflation

For a given set of goods, the price index is 104. Which of the following statements is/are correct about average prices?

• Prices have risen by 104 per cent.

• Prices are now 1.4 times their base year value.

• Prices have risen by 4 per cent.

• Prices have risen by 96 per cent

The correlation coefficient for ten pairs of x and y values, with x ranging from $500 to $700, is calculated to be 0.79, and the regression equation is y = 620 + 4.3x. Which two of the following are correct?

• When x = $600, the estimate of y = 3,200

• When x = $550, the estimate of y from the regression equation is likely to be reliable

• When x = 0, the estimate of y from the regression equation is likely to be reliable

• When x increases by $1, y increases by 0.79

Sales figures for Radiow are given as 547,000 but after seasonal adjustment using a multiplicative model they are only 495,000. What is the seasonal component for the particular season, to 3 d.p.

• 1.224

• 0.905

• 1.105

• 0.683

Based on 20 past quarters, the underlying trend equation for forecasting is y=28.37+4.2x.

If quarter 21 has a seasonal factor of times 1.055, using a multiplicative model, then the forecast for the quarter, in whole units, is

The trend for the monthly sales ($Y) is related to the month (t) by the equation,

Y=1,500-3t where t = 1 in the first month of 20X8.

The forecast sales (to the nearest pound) for the first month of 20X9 if the seasonal component for that month is 0.92 using a multiplicative model is:

• 1,377

• 17,904

• 1,344

• 1,462