Question

Find the standard score for the given data value
A data value in the 50st percentile
     A. 1
    B. 0
    C. 0.5
D. -1

5 points
Question 2
Find outlier in given sample data
-10 2 5 6 3.1 4 6 1
     A. 6
    B. 1
    C. -10
    D. 2
5 points
Question 3
Find the range for the given sample data:
2 4 4.5 15.5 10.3 12 7
     A. 5
    B. 10.3
    C. 13.5
    D. 15.6
5 points
Question 6
Use the guidelines to evaluate the study. From the information given, what is the biggest flaw in the study?
A pharmaceutical company conducted a study to test the effectiveness of its new anti-depression medication. 1000 adults suffering from depression were selected at random and were randomly assigned to either a treatment group or a placebo group.The experiment was double blind. The results were analyzed by the company.
     A. The source of the study
    B. Variables are difficult to define/measure
    C. Confounding variables
    D. Selection bias
5 points
Question 7
For the study described below, identify the sample
In a test of the effectiveness of a new medicine for lowering blood pressure, 200 adult subjects were selected for each of treatment and control groups. Blood pressure was measured half an hour before and half an hour after the treatment. The average (mean) change was -20 mm Hg systolic & -10 mm Hg diastolic for treatment group and -5 mm Hg systolic & -2 mm Hg diastolic for control group.
     A. 400 adult
    B. 200 Adults
    C. All Adults
5 points
Question 8
Solve the problem. Round your answer to two decimal places.
Scores on a test are normally distributed with a mean of 80 and a standard deviation of 10.
What is the standard score and percentile for an exam score of 65?
A. Standard Score = -1.5
Percentile = 6.68
B. Standard Score = -1.5
Percentile = 2.28
C. Standard Score = -1.5
Percentile =-6.68
D. Standard Score = -1.0
Percentile = 15.87
6 points
Question 9
Find the margin of error for the survey results described.
In a poll of 3600 voters of the county, 48% said that they favored the proposed environmental laws
Give your answer as a decimal to four decimal places.
     A. 0.0004
    B. 0.0167
    C. 0.1235
    D. 0.01
5 points
Question 10
Find the median for the given sample data
15 19 21 21 21 15
     A. 20
    B. 21.5
    C. 19
    D. 21
4 points
Question 11
Round to hundredths the standard deviation for the given sample data
1 4 6 7 8 10
     A. 3.51
    B. 2.97
    C. 3.23
    D. 3.16
5 points
Question 12
Use the 68-95-99.7 rule to solve the problem
Scores on a test are normally distributed with a mean of 75 and a standard deviation of 15.
What percentage of the students scored higher than 60?
     A. 90%
    B. 95%
    C. 84%
    D. 68%
6 points
Question 13
Solve the problem.
GRE Scores. Scores on the verbal section of the Graduate Record Exam (GRE) are normally distributed with a mean of 150 and a standard deviation of 8.5.
What percentage of students taking the verbal exam score above 160? Choose the answer that is closest to your result.
     A. 5%
    B. 15.3%
    C. 11.5%
    D. 6.2%
6 points
Question 14
Obtain the five-number summary for the given sample data.
3 2 9 10 0 5 16 13 1 6 11
     A. Lowest value = 0
Lower quartile = 2
Median       = 6
Upper quartile = 10.5
Highest value = 16
    B. Lowest value = 0
Lower quartile = 2.5
Median       = 6
Upper quartile = 10.5
Highest value = 16
    C. Lowest value = 0
Lower quartile = 2
Median       = 6
Upper quartile = 11
Highest value = 16
    D.
Lowest value = 0
Lower quartile = 2
Median       = 7
Upper quartile = 10
Highest value = 16
5 points
Question 15
Identify which of these types of sampling is used: simple random, stratified, systematic, or convenience.
Market research company randomly selects 300 people from each of age groups 15 -30,30-40,40-50, 50-80
     A. Convenience
    B. Simple random
    C. Stratified
    D. Systematic
5 points
Question 16
Answer the question
Which of these get effected by outliers ?
     A. the mean
    B. the median
    C. the mode
5 points
Question 17
Answer the question
Which of the following describes a study in which only the participants don`t know whether they are in treatment or control group?
     A. Observational study
    B. Case-control study
    C. Double-blind experiment
   D. Single-blind experiment
5 points
Question 18
Find the mode for the given sample data
12 15 24 26 25 24 35 25 24
     A. 25
    B. 35
    C. 24
    D. 12
4 points
Question 19
Find the mean for the given sample data.
2, 15, 19, 22, 31, 31, 48
     A. 30
    B. 18
    C. 21
    D. 24
4 points
Question 20
Answer the question
If you conducting a test for statistical study and you got outcome with the likelihood of 0.005.
Please evaluate outcome.
     A. not statistically significant
    B. statistically significant at level 0.01

Answer 1

According to the rules only one question will be answered