Question 1 Multiple Choice
In a stem and leaf plot of numbers with five digits, the stem has two digits. In the number, 42096, the leaf is:
When two categories are close in size, the difference in the size of the categories is easier to see with the histogram.
The histogram is more attractive
The histogram is easier to construct than the pie chart
The histogram is usually used more often to depict budgets
Question 3 Multiple Choice
Which of the following graphical depictions of data represents cumulative frequencies?
Question 4 Multiple Choice
Which of the following is most useful when the decision maker wants to see running totals?
Question 5 Multiple Choice
Which of the following is mainly used to explore the relationship between two numerical variables?
stem and leaf plot
Question 6 Multiple Choice
Data that have been organized into a frequency distribution are called:
Question 7 Multiple Choice
Which of the following graphical depictions of data is a type of vertical bar chart?
stem and leaf plot
Question 8 Multiple Choice
In a frequency distribution, which of the following is a running total of frequencies through the classes?
Question 9 Multiple Choice
Suppose the table below contains the four largest companies in a given industry and each company's respective annual sales (in $millions). If a pie chart were constructed to depict the sales of these companies, how many degrees would be in the "slice" of the pie for company C?
Question 10 Multiple Choice
Consider the following frequency distribution:
What is the relative frequency of the 10-under 15 class?
Question 11 Multiple Choice
Which of the following is sometimes more difficult to interpret than other graphical depictions because the relative sizes of angles are hard to judge?
Question 12 Multiple Choice
Which of the following is named after an Italian economist?
pizza pie chart
Question 13 Multiple Choice
It is recommended that the number of classes in a frequency distribution be between:
6 and 20
10 and 20
5 and 15
5 and 20
Question 14 Multiple Choice
Consider the following frequency distribution:
What is the relative frequency for the class 20-under 30?
Question 15 Multiple Choice
In a frequency distribution, which of the following is sometimes referred to as the class mark?
See attached file for full problem description.© BrainMass Inc. brainmass.com October 24, 2018, 8:35 pm ad1c9bdddf
This posting contains answers to following 15 MCQs on types of charts
Multiple choice questions on Test of hypothesis
1) If a test of a hypothesis has a Type 1 error probability (a) of 0.01, we mean:
A) if the null hypothesis is true, we don't reject it 1% of 0.01 of the time(B) if the null hypothesis is true, we reject it 1% of the time (C) if the null hypothesis is false, we don't reject it 1% of the time (D) if the null hypothesis is false, we reject it 1% of the time.
2) A "robust" test procedure is one which:
A) requires a sophisticated level of measurement (B) requires a semi-circular shaped population (C) is sensitive to sight violations in its assumption (D) is sensitive to slight violations in its assumption
3) The operation manager at a light bulb factory wants to determine whether there is any difference in average life expectancy of bulbs manufactured on two different types of machines. The process standard deviation of Machine I is 110 hours and of Machine II is 125 hours. A random sample of 25 light bulbs obtain from Machine I indicates a sample means 375 hours ands a similar sample of 25 from Machine II indicates a sample of 362 hours. Using the 0.05 level of significance, which of the following statements offers the most accurate and appropriate measure that there is not enough evidence to conclude that there is a difference in the average life of bulbs produced by two types of machines.
A) Z=0.3904 and is between the critical bounds of _ 1.96 (B) t=0.0117 and is between the
critical bounds of _ 2.01 ( C ) t= 1.3829 and between the critical bounds of _2.01 (D)
Z=0.424 and between the critical bounds of _ 1.96
4) Which of the following would be an appropriate null hypothesis
A) The mean of population is equal to 55 (B) the mean of a sample is equal to 55 (C) the mean of a population is greater than 55 (D) only a and c are true
5) A consumer magazine sample the random arrival time for two major airline. The data on how many minute each plane was early (negative value) or late (positive values is shown below
Air Tran 5 -1 39 9 12 21 15 52 18 23
Delta 8 4 10 4 12 5 4 9 15 33 14
The correct test statistic for testing the hypothesis that there is no difference in the arrival times of planes from the two airlines is:
A) t=1.7983 (B) Z =1.2185 (C) t= 1.5240 (D) Z=2.4397
6) Are Japanese manager more motivated than American manager? A randomly selected group of each were administered the Sarnoff Survey of Attitude Toward Life (SSATL), which measure motivation for pward mobility. The score are summarized below.
SAMPLE SIZE 211 100
Mean SSATL Score 65.75 79.83
Population STD Dev. 11.07 6.41
Referring to the table above, suppose that the test statistic is Z= 2.45. Find the p value if we assume that the alternative hypothesis was two-tailed test(H1:A-J0).
A) 0.0071 (B) 0.0142 (C) 0.4929 (D) 0.9858
7) It is possible to directly compare the results of a confidence in interval estimate to the results obtained by testing a null hypothesis if :
A) a two tailed test for u is used (B) a one tailed test for u is used (C) both of the previous statement is true (D) none of the previous statement are true.
8) If we are performing a two-tailed test of whether u=100, the probability of detecting a shift of the mean to 105 will be ______ the probability of detecting a shift of the mean to 100.
A) less than (B) greater than (C) equal to (D) not comparable to
9) The t test for the mean difference between two related population assume that the respective
A) sample size are equal (B) sample variance are equal (C) population are approximately normal or sample size are large enough (D) all of the above
10) The use of preservative by food processors has become a controversial issue. Suppose two preservatives are extensively tested and determined safe for use in meat. A processor wants to compare the preservatives for their effects on retarding spoilage. Suppose 15 cuts of fresh meat are treated with preservatives A and 15 are treated with preservation B, and the number of hours until spoilage begin is recorded for each of the 30 cuts of meat. The results are summarized in the table below.
Preservative A Preservative B
A=106.4 hours B=96.54 hours
SA =10.3 SB =13.4 hours
Referring to the table above , which of the following is correct test statistic for determining if the population variance differ for preservation A and B?
A) F=-3.10 (B) F=0.5908(C) F=0.7687 (D) F=0.8250
11) In testing for the differences between the means of 2 independent population where the variances in each population are unknown but assumed equal, the degree of freedom are:
A) n-1 (B) n1+ n2-1 (C) n1+n2-2. (D) n-2