Question

a quality control specialist for a large computer store conducted a random sample of 150 laptops from its stock. she found 3 did not turn on and 5 required system updates to run properly. what is a reasonable probability model for the laptops the store has in stock? select all that apply. 96.6% of the laptops will function properly. 5.3% of the laptops will require system updates. 3.3% of the laptops will require system updates. 2% of the laptops will require system updates. 92% of the laptops will function properly. 94.7% of the laptops will function properly.

Explanation:

Step1: Calculate proportion of laptops not turning on

The number of laptops not turning on is 3 out of 150. The proportion is $\frac{3}{150}= 0.02$ or 2%.

Step2: Calculate proportion of laptops needing system - updates

The number of laptops needing system - updates is 5 out of 150. The proportion is $\frac{5}{150}\approx0.033$ or 3.3%.

Step3: Calculate proportion of properly - functioning laptops

The total number of non - properly functioning laptops is $3 + 5=8$. The number of properly functioning laptops is $150−8 = 142$. The proportion is $\frac{142}{150}\approx0.947$ or 94.7%.

Answer:

C. 3.3% of the laptops will require system updates.
G. 94.7% of the laptops will function properly.