Question
In: Statistics and Probability
A sociologist is studying the age of the population in Blue Valley. Ten years ago, the...
A sociologist is studying the age of the population in Blue Valley. Ten years ago, the population was such that 20% were under 20 years old, 13% were in the 20- to 35-year-old bracket, 31% were between 36 and 50, 24%were between 51 and 65, and 12% were over 65. A study done this year used a random sample of 210 residents. This sample is given below. At the 0.01 level of significance, has the age distribution of the population of Blue Valley changed?
| Under 20 | 20 - 35 | 36 - 50 | 51 - 65 | Over 65 |
|---|---|---|---|---|
| 29 | 27 | 65 | 65 | 24 |
Find the sample test statistic.
Solutions
orchestra answered 1 year agoRelated Solutions
A sociologist is studying the age of the population in Blue Valley. Ten years ago, the...
A sociologist is studying the age of the population in Blue
Valley. Ten years ago, the population was such that 19% were under
20 years old, 13% were in the 20- to 35-year-old bracket, 31% were
between 36 and 50, 24% were between 51 and 65, and 13% were over
65. A study done this year used a random sample of 210 residents.
This sample is given below. At the 0.01 level of significance, has
the age distribution of the...
A sociologist is studying the age of the population in Blue Valley. Ten years ago, the...
A sociologist is studying the age of the population in Blue
Valley. Ten years ago, the population was such that 19% were under
20 years old, 14% were in the 20- to 35-year-old bracket, 31% were
between 36 and 50, 24% were between 51 and 65, and 12% were over
65. A study done this year used a random sample of 210 residents.
This sample is given below. At the 0.01 level of significance, has
the age distribution of the...
A sociologist is studying the age of the population in Blue Valley. Ten years ago, the...
A sociologist is studying the age of the population in Blue
Valley. Ten years ago, the population was such that 19% were under
20 years old, 11% were in the 20- to 35-year-old bracket, 33% were
between 36 and 50, 24% were between 51 and 65, and 13% were over
65. A study done this year used a random sample of 210 residents.
This sample is given below. At the 0.01 level of significance, has
the age distribution of the...
A sociologist is studying the age of the population in Blue Valley. Ten years ago, the...
A sociologist is studying the age of the population in Blue
Valley. Ten years ago, the population was such that 20% were under
20 years old, 11% were in the 20- to 35-year-old bracket, 34% were
between 36 and 50, 24% were between 51 and 65, and 11% were over
65. A study done this year used a random sample of 210 residents.
This sample is given below. At the 0.01 level of significance, has
the age distribution of the...
A sociologist is studying the age of the population in Blue Valley. Ten years ago, the...
A sociologist is studying the age of the population in Blue
Valley. Ten years ago, the population was such that 20% were under
20 years old, 12% were in the 20- to 35-year-old bracket, 34% were
between 36 and 50, 24% were between 51 and 65, and 10% were over
65. A study done this year used a random sample of 210 residents.
This sample is given below. At the 0.01 level of significance, has
the age distribution of the...
A sociologist is studying the age of the population in Blue Valley. Ten years ago, the...
A sociologist is studying the age of the population in Blue
Valley. Ten years ago, the population was such that 19% were under
20 years old, 12% were in the 20- to 35-year-old bracket, 33% were
between 36 and 50, 24% were between 51 and 65, and 12% were over
65. A study done this year used a random sample of 210 residents.
This sample is given below. At the 0.01 level of significance, has
the age distribution of the...
A sociologist is studying the age of the population in Blue Valley. Ten years ago, the...
A sociologist is studying the age of the population in Blue
Valley. Ten years ago, the population was such that 20% were under
20 years old, 14% were in the 20- to 35-year-old bracket, 34% were
between 36 and 50, 24% were between 51 and 65, and 8% were over 65.
A study done this year used a random sample of 210 residents. This
sample is given below. At the 0.01 level of significance, has the
age distribution of the...
A sociologist is studying the age of the population in Blue Valley. Ten years ago, the...
A sociologist is studying the age of the population in Blue
Valley. Ten years ago, the population was such that 19% were under
20 years old, 13% were in the 20- to 35-year-old bracket, 29% were
between 36 and 50, 24% were between 51 and 65, and 15% were over
65. A study done this year used a random sample of 210 residents.
This sample is given below. At the 0.01 level of significance, has
the age distribution of the...
A sociologist is studying the age of the population in Blue Valley. Ten years ago, the...
A sociologist is studying the age of the population in Blue
Valley. Ten years ago, the population was such that 19% were under
20 years old, 13% were in the 20- to 35-year-old bracket, 30% were
between 36 and 50, 24% were between 51 and 65, and 14% were over
65. A study done this year used a random sample of 210 residents.
This sample is given below. At the 0.01 level of significance, has
the age distribution of the...
The average age of online consumers ten years ago was 23.3 years. As older individuals gain...
The average age of online consumers
ten years ago was 23.3 years. As older individuals gain
confidence with the Internet, it is
believed that the average age has increased. We would like to
test
this belief.
(a) Write the appropriate hypotheses
to be tested.
(b) The online shoppers in our sample
consisted of 40 individuals, had an average age of 24.2
years, with a standard deviation of
5.3 years. What is the test statistic and p‐value for the
hypotheses being...
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