Quiz document | Mathematics homework help

 

 

 

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1.  Evaluate   (probability of success in a Bernoulli trial) for the following values:

 

             n = 10    x = 2    p = 0.6

                                                                                                 

 

 

 

 

           

 

                                                                        Answer:  P(2) =  ___________________________

 

 

 

2. – 3.  The following full IQ scores were obtained by testing a group of children who live near a lead smelter and are exposed to high concentrations of lead in the environment:

 

82	93	85	75	85	80	101	89	80	94
88	104	88	83	104	96	76	80	79	75

 

 

            2.  Complete the following frequency table:

 

 

IQ Interval	Frequency	Relative Frequency
67.5 – 72.5
72.5 – 77.5
77.5 – 82.5
82.5 – 87.5
87.5 – 92.5
92.5 – 97.5
97.5 – 102.5
102.5 – 107.5
107.5 – 112.5

 

 

3.  Using the UNGROUPED sample data, find the mean; median; and mode(s), if any:

 

 

 

 

 

 

 

 

 

 

 

 

 

            Answers:  Mean ______________  Median  _________________   Mode ___________

 

 

4. – 5.  A social psychologist gave a survey to 8 active members of a small political action group about how many hours they put into the group’s activities each week. The results were as follows: 41, 24, 44, 33, 40, 41, 19, and 30.

 

 

            4.  Compute the sample mean, median, and mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

            Answers:  Mean ______________  Median  _________________   Mode ___________

 

 

 

            5.  Compute the sample variance and sample standard deviation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

            Answers:  Variance  ___________________  Standard Deviation  __________________

           

 

 

6. – 7.  A study of blood cholesterol levels using samples from 80 participants provided the following data:

 

Blood Cholesterol Level (mg/dl)(Interval)	Frequency
149.5 – 169.5	4
169.5 – 189.5	11
189.5 – 209.5	15
209.5 – 229.5	25
229.5 – 249.5	13
249.5 – 269.5	7
269.5 – 289.5	3
289.5 – 309.5	2

 

           

                        6.  Compute the mean and median:

 

 

 

 

 

 

 

 

 

 

 

 

                                                Answers:  Mean ______________  Median  _________________  

 

 

 

                        7.  Compute sample standard deviation.

 

 

 

 

 

 

 

 

 

 

 

 

                                                Answer:  Standard Deviation  __________________________

 

8.  Identify the graphics presented below (enter letter of choice which best describes graph type):

 

       

           

 

 

            _________                                   __________                                   __________               

 

Choices:          a.  broken line graph                c.  double bar graph                e.  ogive                                               b.  histogram                           d.  divided bar graph              f.  pie graph    

 

 

 

 

 

 

 

9.  One of the initial clinical trials of the anti-math anxiety drug SHOVITALL™ tested for the presence of headaches as a side effect.  In the trial, 450 subjects were treated with 80mg of the drug, and 2.2% of the subjects developed headaches.  In the binomial distribution of these 450 subjects, what are the mean and standard deviation?   Use p = 0.022

 

 

 

 

 

 

 

 

 

 

 

 

                        Answers:  Mean = _______________  Standard Deviation = _________________

 

 

 

 

 

 

10.  Multiple Choice:  According to the American Chemical Society, there is a 0.9 probability that in the United States, a single randomly selected $1 dollar bill is tainted with traces of cocaine.  Assume eight $1 dollar bills are randomly selected.  What is the probability that six (6) or more of the $1 dollar bills randomly selected will be tainted with traces of cocaine?

 

 

A.    P (≥ 6) =  0.962                                         C.   P (≥ 6) =  0.149

B.     P (≥ 6) =  0.750                                         D.   P (≥ 6) =  0.813

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                                                                                    Answer:  _________________________