Question

Smart phone: Among 247 cell phone owners aged 18-24 surveyed, 107 said their phone was an Android phone.

Find a point estimate for the proportion of cell phone owners aged 18-24 who have an Android phone. Round the answer to three decimal places. The point estimate for the proportion of cell phone owners aged 18-24 who have an Android phone is 0.433

Answer 1

To find the point estimate for the proportion of cell phone owners aged 18-24 who have an Android phone, divide the number of Android owners (107) by the total number surveyed (247) to get 0.433.

Step-by-step explanation:

The question asks to find a point estimate for the proportion of cell phone owners aged 18-24 who have an Android phone. To calculate a point estimate for a proportion, you use the formula:

Point Estimate = (Number of Successes) / (Total Number of Trials)

In this case, the number of successes is the number of people who said they have an Android phone (107), and the total number of trials is the total number of cell phone owners surveyed (247). Therefore, the calculation is as follows:

Point Estimate = 107 / 247 = 0.433

This result should be rounded to three decimal places as specified in the question. The proportion of cell phone owners aged 18-24 who have an Android phone is hence 0.433.