Thread: Help - Problems in Statistics

Dear All,
Please help me solving these problems in statistics.
Appreciate your response.

1. Jeevan is the line supervisor for a manufacturing firm that produces radial tyres of radius 12, 13, and 14. He tests each day’s production by picking a set of tyres from radius 12 size for defects. Jeevan says that he selects “at random”. Is this in fact a random sample of the day’s production? If you differ in your view, then what is the type of sampling done?

2. Develop-Well a software company estimated last year that 35% of potential software buyers were planning to wait to purchase their new operating system DWOS until an upgrade had been released. After an advertising campaign to re-assure the public, the company surveyed 3000 people and found 950 were still skeptical. At 5% significance level
can the company conclude that the proportion of skeptical people has decreased?

3. A lottery commission claims that for a new lottery game there
prize, 5% chance of getting $100 and 85% chance of getting winner form the last lottery went and bought 1000 tickets for onedollar prizes, 48 hundred-dollar prizes and 865 worthless Significance (LOS) is the claim of commission reasonable?

Originally Posted by janny

Dear All,
Please help me solving these problems in statistics.
Appreciate your response.

1. Jeevan is the line supervisor for a manufacturing firm that produces radial tyres of radius 12, 13, and 14. He tests each day’s production by picking a set of tyres from radius 12 size for defects. Jeevan says that he selects “at random”. Is this in fact a random sample of the day’s production? If you differ in your view, then what is the type of sampling done?

2. Develop-Well a software company estimated last year that 35% of potential software buyers were planning to wait to purchase their new operating system DWOS until an upgrade had been released. After an advertising campaign to re-assure the public, the company surveyed 3000 people and found 950 were still skeptical. At 5% significance level
can the company conclude that the proportion of skeptical people has decreased?

3. A lottery commission claims that for a new lottery game there
prize, 5% chance of getting $100 and 85% chance of getting winner form the last lottery went and bought 1000 tickets for onedollar prizes, 48 hundred-dollar prizes and 865 worthless Significance (LOS) is the claim of commission reasonable?

Questions are from an MBA assignment: http://www.coolavenues.com/forums/ar...p/t-20697.html

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