There is no need to answer the questions asked, just what type of test should I

Question

There is no need to answer the questions asked, just what type of test should I use?

No values are missing. 700 entries certainly will not be posted, read plz

Selecting the Correct Test Procedure

Instructions: Choose the number of the correct statistical procedure (test) in each of the problems listed below.  Use the information to set up the appropriate null hypothesis and give the type of the response variable (nominal, ordinal, discrete, or continuous). Choices of tests include:

·         1-sample z-test about a proportion (1)

·         1-sample t-test about a mean (2)

·         2-sample z-test about two proportions (3)

·         2-sample t-test about two independent means (4)

·         paired t-test about average difference of two means (5)

·         t-test about a slope of a regression line (6)

·         Chi-square test (7)

1.      Two measurements of head circumference were made on each student in Stat 200.  We want to know if we get, on the average, the same value on the second measurement as we do on the first. Given below are some of the 700 student measurements.  

Student

1          2          3          4          5          ...         ...                     700

1st   Measurement:       56.0     59.0     52.5     61.5     55.2     ...         ...                     57.5

2nd  Measurement:       55.5     59.4     53.5     60.0     57.0     ...         ...                     56.8

2.      A politician asserts that only 40% of Americans are in favor of changing the way that presidential primaries are held.  An anchor at Fox News disputed this, saying it was certainly more than 40%.  A Gallup poll of 850 people showed that 442, or 52%, are in favor of changing the ways that presidential primaries are conducted.  Who do you think is right--the politician or Fox News anchor?  

3.      From time-to-time the National Institutes of Health (NIH) examine age and total cholesterol level (TCL) among males and females.  Here are the ages and TCL's of 10 adult males:

           1   2    3     4     5     6     7     8     9   10

     Age  28  31    52    67    44    35    51    64    24    39

     TCL 190  188   215  235   220  167   200   278   165    195

       Is there a relationship between age and TCL?      

4.      The American Heart Association claims in nutrition brochures that the average total cholesterol among women in the age group 55-64 is 208.  A nutritionist who believes the total cholesterol is higher than this obtained the total cholesterol levels from 25 women and found that the average was 223, with a standard deviation of 30.  Does this data contradict the American Heart Association’s claim (and support the nutritionists belief)?              

5.      A physiologist and a psychologist were talking about strange facts in people.  The physiologist said that there is a substantial difference between males and females on which finger is longest in people: the ring or the index finger.  The psychologist retorted that this was stupid--there couldn’t be any sizable difference between males and females.  So they decided to do a statistical analysis on some data collected in Stat 250 classes in the 1990s.  Here is the data they obtained:

      Longer Finger

Ring     Index    Total

Males               175      74           249

Females           287      188          475

On the basis of this data, do you believe there is a sex difference? There are two ways to analyze this data.  List both.

Explanation / Answer

Solution:-

1) Paired t-test about average difference of two means.

2) 1-sample z-test about a proportion.

3) t-test about a slope of a regression line.

4) 1-sample z-test about a proportion.

5) Chi-square test and 2-sample z-test about two proportions.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.