1. A cell phone company wants to draw a sample of 600 customers to gather opinions about potential new features on upcoming phone models. The company draws a random sample of 200 customers who own l-phones, a random sample of 100 customers who own I.G. phones, a random sample of 100 customers who own Samsung phones and a random sample of 200 customers who own other brands of phones. The company uses this combined sample as their survey. What type of sample have they used for their survey. Table 1 59 83 88 89 90 92 93 95 99 101 61 84 88 90 91 92 94 95 99 101 66 85 88 90 91 92 94 96 99 103 71 86 88 90 91 93 94 96 99 105 82 86 89 90 92 93 94 96 99 105 83 88 89 90 92 93 94 97 99 116