latex gloves. Summary statistics for thr number of latex gloves used per week are = 19.4 and s = 11.6. Complete parts( a) –( d).
3. Each child in a sample of 62 low-income children was administered a language and communication exam. The sentence complexity scores had a mean of 7.63 and a standard deviation of 8.92. Complete parts a through d.
4. The random sample shown below was selected from a normal distribution.
4, 10, 7,…. 2. Complete parts a and b.
5. Periodically, a town water department tests the drinking water of homeowners such as lead. The lead levels in water specimens collected for a sample of 10 residents of the town had a mean of 3.1 mg / L and a standard deviation of 1.2 mg / L. Complete parts a through c.
6. A random sample of size n = 250 yielded = 0.20.
7. A newspaper reported that 50 % of people say that some coffee shops are overpriced. The source of this information was a telephone survey of 40 adults.
8. An accounting firm annually monitors a certain mailing service’ s performance. One parameter of interest is the percentage of mail delivered on time. In a sample of 303,000 items mailed between Dec. 10 and Mar. 3 __ the most difficult delivery season due to bad weather and holidays __ the accounting firm determined that 245,200 items were delivered on time. Use this information to make a statement about the likelihood of an item being on time by that mailing service.
9. Suppose oyu’ re given a data set that classifies each sample unit into one of four categories: A, B, C, or D. You plan to create a computer database consisting of these data, and you decide to code the data as A = 1, B = 2, C = 3, and D = 4. Are the data consisting of the classifications A, B, C and D qualitative or Quantitative? After the data are input as 1, 2, 3, or 4, are they qualitative or Quantitative?