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Question 150

Dr. Vance gathered quantitative data by recording whether commuters on a city path used a Bicycle or an Electric Scooter during different times of the day. Dr. Vance collected observations during a Morning Peak period and a Midday Off-Peak period. In total, 20 commuter choices were sampled during each period, resulting in a total of 40 observed journeys. The data is displayed in Table 1.

Table 1: Transport mode choices of commuters during peak and off-peak hours

BicycleElectric ScooterTotals
Morning Peak14620
Midday Off-Peak81220
Totals221840

Calculate chi-squared for this data by completing Table 2.

Table 2: Chi-squared calculation template

Commuter GroupTransport ModeObservedExpectedO−EO - EO−E(O−E)2(O - E)^2(O−E)2(O−E)2E\displaystyle \frac{(O - E)^2}{E}E(O−E)2​
Morning PeakBicycle1411.0
Electric Scooter69.0
Midday Off-PeakBicycle811.0
Electric Scooter129.0
χ2=\chi^2 =χ2=
[4]
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Methods Questions

  1. A Level
  2. /Psychology
  3. /Methods

Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 638 questions, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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