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# A department store manager has monitored the number of complaints received per week about poor service.

A department store manager has monitored the number of complaints received per week about poor service. The probabilities for numbers of complaints in a week, established by this review, are shown in the table.

Number of complaints 0 1 2 3 4 5

Probability 0.13 0.21 0.44 0.07 0.06 0.09

What is the probability of between 1 and 2 (inclusive) complaints received per week?

A department store manager has monitored the number of complaints received per week about poor service. The probabilities for numbers of complaints in a week, established by this review, are shown in the table.

Number of complaints 0 1 2 3 4 5

Probability 0.16 0.26 0.35 0.10 0.08 0.05

What is the median of complaints received per week?

A department store manager has monitored the number of complaints received per week about poor service. The probabilities for numbers of complaints in a week, established by this review, are shown in the table.

Number of complaints 0 1 2 3 4 5

Probability 0.15 0.20 0.41 0.11 0.06 0.07

What is the standard deviation of complaints received per week?

Note that the correct answer will be evaluated based on the full-precision result you would obtain using Excel.

Note that the correct answer will be evaluated based on the full-precision result you would obtain using Excel.

Note that the correct answer will be evaluated based on the full-precision result you would obtain using Excel.

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