stratified sample help
A shop has a large number of light bulbs in stock.
Each light bulb has either a bayonet fitting or a screw fitting.
For each type of fitting there are bulbs that consume different amounts of power.
The manager of the shop decides to test a sample of 5% of the bulbs in stock
*(a) explain how the manager could take a stratified sample of the bulbs for testing. (3 marks)
(b) Do you think taking a stratified sample is appropriate in this situation?
Give reasons for your answer (2 marks)
Each light bulb has either a bayonet fitting or a screw fitting.
For each type of fitting there are bulbs that consume different amounts of power.
The manager of the shop decides to test a sample of 5% of the bulbs in stock
*(a) explain how the manager could take a stratified sample of the bulbs for testing. (3 marks)
(b) Do you think taking a stratified sample is appropriate in this situation?
Give reasons for your answer (2 marks)
Original post by hbos14
A shop has a large number of light bulbs in stock.
Each light bulb has either a bayonet fitting or a screw fitting.
For each type of fitting there are bulbs that consume different amounts of power.
The manager of the shop decides to test a sample of 5% of the bulbs in stock
*(a) explain how the manager could take a stratified sample of the bulbs for testing. (3 marks)
(b) Do you think taking a stratified sample is appropriate in this situation?
Give reasons for your answer (2 marks)
Each light bulb has either a bayonet fitting or a screw fitting.
For each type of fitting there are bulbs that consume different amounts of power.
The manager of the shop decides to test a sample of 5% of the bulbs in stock
*(a) explain how the manager could take a stratified sample of the bulbs for testing. (3 marks)
(b) Do you think taking a stratified sample is appropriate in this situation?
Give reasons for your answer (2 marks)
To do all of this you need to know what Stratified Sampling is.
Do you know what Stratified Sampling is?
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