Question: An analyst wants to know how many electronic devices a person owns. A survey on a random sample of 100 people is conducted and the

An analyst wants to know how many electronic devices a person owns. A survey on a random sample of 100 people is conducted and the results are shown as follows:

Number of devices. Frequency

0 2

1 19

2 45

3 31

4 3

(a) Construct a 95% confidence interval for the population mean number of electronic devices own by a person.

(b) Construct a 95% confidence interval for the population proportion of people having 2 or more electronic devices.

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