An online retailer has a new website and would like to compare the proportion of customers who made a purchase from the old website versus the proportion who made a purchase from the new website to see if the two proportions are different. A simple random sample of customers visiting the old and new websites is taken. The results are shown below. Old site Successes Observations Proportion Confidence level Z-score p-value 156 Successes 400 Observations 0.390 Proportion 90% 1.819 0.069 New site Old site samples: nold = Ex: 9 49 100 0.490 New site samples: nnew Sample proportion for old site samples: Pold Sample proportion for new site samples: new 1 -3 -2 2= Ex: 1.234 Ex: 1.234 -1 0 1 2= 2 p= Ex: 1.234 2 3

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An online retailer has a new website and would like to compare the proportion of customers who made a purchase
from the old website versus the proportion who made a purchase from the new website to see if the two
proportions are different. A simple random sample of customers visiting the old and new websites is taken. The
results are shown below.
Old site
Successes
Observations
Proportion
Confidence level
Z-score
p-value
156 Successes
400 Observations
0.390 Proportion
90%
1.819
0.069
New site
Old site samples: nold
= Ex: 9
49
100
0.490
New site samples: nnew
Sample proportion for old site samples: Pold
Sample proportion for new site samples: new
1
-3
-2
2= Ex: 1.234
= Ex: 1.234
-1
0
1
2 =
2
P= Ex: 1.234
2
3
Transcribed Image Text:An online retailer has a new website and would like to compare the proportion of customers who made a purchase from the old website versus the proportion who made a purchase from the new website to see if the two proportions are different. A simple random sample of customers visiting the old and new websites is taken. The results are shown below. Old site Successes Observations Proportion Confidence level Z-score p-value 156 Successes 400 Observations 0.390 Proportion 90% 1.819 0.069 New site Old site samples: nold = Ex: 9 49 100 0.490 New site samples: nnew Sample proportion for old site samples: Pold Sample proportion for new site samples: new 1 -3 -2 2= Ex: 1.234 = Ex: 1.234 -1 0 1 2 = 2 P= Ex: 1.234 2 3
An online retailer has a new website and would like to compare the proportion of customers who made a purchase
from the old website versus the proportion who made a purchase from the new website to see if the two
proportions are different. A simple random sample of customers visiting the old and new websites is taken. The
results are shown below.
Old site
Successes
Observations
Proportion
Confidence level
Z-score
p-value
156 Successes
400 Observations
0.390 Proportion
90%
1.819
0.069
New site
Old site samples: nold
= Ex: 9
49
100
0.490
New site samples: nnew
Sample proportion for old site samples: Pold
Sample proportion for new site samples: new
1
-3
-2
2= Ex: 1.234
= Ex: 1.234
-1
0
1
2 =
2
P= Ex: 1.234
2
3
Transcribed Image Text:An online retailer has a new website and would like to compare the proportion of customers who made a purchase from the old website versus the proportion who made a purchase from the new website to see if the two proportions are different. A simple random sample of customers visiting the old and new websites is taken. The results are shown below. Old site Successes Observations Proportion Confidence level Z-score p-value 156 Successes 400 Observations 0.390 Proportion 90% 1.819 0.069 New site Old site samples: nold = Ex: 9 49 100 0.490 New site samples: nnew Sample proportion for old site samples: Pold Sample proportion for new site samples: new 1 -3 -2 2= Ex: 1.234 = Ex: 1.234 -1 0 1 2 = 2 P= Ex: 1.234 2 3
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