PC Magazine asked all of its readers to participate in a survey of their satisfaction with different brands of electronics. In the 2004 survey, which was included in an issue of the magazine that year, more than 9000 readers rated the products on a scale from 1 to 10. The magazine reported that the average rating assigned by 225 readers to a Kodak compact digital camera was 7.5. For this product, identify the following: a. The population
b. The parameter of interest
c. The sampling frame
d. The sample size
e. The sampling design

Solution :

According to the question PC magazine conducted a survey and asked its readers to participate their satisfaction with the different brands of the electronic item. Around 9000 readers rated the product from scale 1 to 10.

SO we have to identify the following regarding the survey :

a. identifying the population

  -- all the readers of the PC magazine

b.  identifying the parameters of the interests

   -- the population mean that rated the digital camera

c.  identifying the sampling frame

--- all the readers

d.  identifying the sample size

  -- unknown

e.  identifying the sampling design

  -- voluntary response

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950