Chapter 1 HW

*AVX Stereo Equipment, Inc., recently began a "no-hassles" return policy. A sample of 315 customers who recently returned items showed 120 though the policy was fair, 150 thought it took too long to complete the transaction, and the rest had no opinion. On the basis of this information, make in inference about customer reaction to the new policy. (Round answers to 1 decimal place)* *A)* Fair *B)* Too Long *C)* No Opinion

*A)* Fair -- 41.3% *B)* Too Long -- 54.0% *C)* No Opinion -- 4.7%

*AVX Stereo Equipment, Inc., recently began a "no-hassles" return policy. A sample of 505 customers who recently returned items showed 320 though the policy was fair, 150 thought it took too long to complete the transaction, and the rest had no opinion. On the basis of this information, make in inference about customer reaction to the new policy. (Round answers to 1 decimal place)* *A)* Fair *B)* Too Long *C)* No Opinion

*A)* Fair -- 63.4% *B)* Too Long -- 29.7% *C)* No Opinion -- 6.9%

*For the following questions, would you collect information using a SAMPLE or a POPULATION?* *a)* All the senators of the United States presently in office. *b)* 1500 people selected to find out the soft drink preference in Chicago. *c)*How many books are published in one week by a famous publishing *d)* To test a new drug produced by a biotech company *e)* To find the number of men and women working in an IT company *f)* To Estimate the average salary of doctors in California

*CHECK answers for correctness, *a)* Population *b)* Sample *c)* Population *d)* Sample *e)*Population *f)*Sample

*For the following questions, would you collect information using a SAMPLE or a POPULATION?* *a)* To calculate the percentage of car owners in New York City. *b)* To know how many different private airlines provide services in the US. *c)* To estimate weekly earnings of computer programmers in the US. *d)* To find the marks of a class of 20 students in a physics exam *e)* 2000 car owners randomly chosen to identify preference for models *f)* All the members of the United Nations Organization

*CHECK answers for correctness, except for e & f* *a)* Sample *b)* Population *c)* Sample *d)* Population *e)* Sample *f)* Population

*A poll solicits a large number of college undergraduates for information on the following variables. What is the level of measurement for each of these 3 variables? (Interval/Nominal/Ordinal/Ratio)* *a)* the cell phone provider *b)* the number of minutes used last month *c)* their satisfaction with the service

*CHECK for correctness* *a)* Nominal *b)* Ratio *c)* Ordinal

*For the publication of Statistical Abstract of the US, data are taken and represented below with details. What kind of scale can be used to measure them?* *The states of Massachusetts and Colorado were ranked 1 and 2 in a survey of persons 25 years and above with a Bachelor's degree or more in 2000* *A)* Nominal *B)* Interval *C)* Ratio *D)* Ordinal

*D)* Ordinal

*For the publication of Statistical Abstract of the US, data are taken and represented below with details. What kind of scale can be used to measure them?* *There were 138 males and 112 females who were enrolled for the doctoral program at the local college university in 2007?* *a)* Interval *b)* Nominal *c)* Ordinal *d)* Ratio

*b)* Ordinal