Inferential and Predictive Statistics for Business | Online Course Support

A supermarket chain is testing a revised work flow. If the redesign is effective, then the process for all locations will be revised. For this decision, data has been collected in one location under the current design and one location under the new design. To make the new design standard, the difference in proportion of customer billing completed within 10 minutes should be 30% higher than it is right now.

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9. Question 9 A supermarket chain is testing a revised work flow. If the redesign is effective, then the process for all locations will be revised. For this decision, data…

Inferential and Predictive Statistics for Business | Online Course Support

When faced with an option of going for paired difference tests or drawing random independent samples for comparison, it would be better to opt for the paired difference option.

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8. Question 8 When faced with an option of going for paired difference tests or drawing random independent samples for comparison, it would be better to opt for the paired…

Inferential and Predictive Statistics for Business | Online Course Support

The one-tail test is conducted to find out if the mean of one population differs from mean of another population in a certain direction.

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3. Question 3 The one-tail test is conducted to find out if the mean of one population differs from mean of another population in a certain direction. 1 point  …

Inferential and Predictive Statistics for Business | Online Course Support

A company has reduced its staffing level in its customer service department. They believe that with the new call center system upgrade many of the customers will have their questions answered without talking to an agent. Thus, the expectation is that average time spent by customers on the phone will be the same after this downsizing. They plan to initiate a study to be sure. What is the null hypothesis?

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2. Question 2 A company has reduced its staffing level in its customer service department. They believe that with the new call center system upgrade many of the customers will…

Inferential and Predictive Statistics for Business | Online Course Support

A company has started a six sigma project. The goal is to reduce the defects to zero. They have just done the first initiative and have data collected for comparison to the defect rate before the process improvement to check if the average number of defects has gone down. The analysis below is for this company.

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5. Question 5 A company has started a six sigma project. The goal is to reduce the defects to zero. They have just done the first initiative and have data…

Inferential and Predictive Statistics for Business | Online Course Support

A company has started a six sigma project. The goal is to reduce the defects to zero. They have just done the first initiative and have data collected for comparison to the defect rate before the process improvement to check if the average number of defects has gone down. What is the null hypothesis?

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4. Question 4 A company has started a six sigma project. The goal is to reduce the defects to zero. They have just done the first initiative and have data…

Inferential and Predictive Statistics for Business | Online Course Support

A recent study conducted by the state government attempts to determine whether the voting public supports a further increase in cigarette taxes to help the public schools. The opinion poll recently sampled 1500 voting age citizens.

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11. Question 11 A recent study conducted by the state government attempts to determine whether the voting public supports a further increase in cigarette taxes to help the public schools….

Inferential and Predictive Statistics for Business | Online Course Support

A recent study conducted by the state government attempts to determine whether the voting public supports a further increase in cigarette taxes to help the public schools. The opinion poll recently sampled 1000 voting age citizens.

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10. Question 10 A recent study conducted by the state government attempts to determine whether the voting public supports a further increase in cigarette taxes to help the public schools….