Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Measures of location and dispersion.

1) Which of the following is NOT true regarding the normal probability distribution?

a.       Mean, median and mode are all equal

b.      It has a single peak

c.       It is symmetrical

d.      The points of the curve meet the X-axis at z = -3 and z = 3

e.       None of the above

2) Which of the following is not a characteristic of the normal probability distribution?

a.       Positively skewed

b.      Bell-shaped

c.       Symmetrical

d.      Asymptotic

e.       All of the above

3) Which announcement about bar charts and histograms is false?

a.       Histograms have no spaces between the bars.

b.      Histograms show how a quantitative variable is distributed while bar charts show counts (or percents) for different categories of a categorical variable.

c.       Histograms are just a special kind of bar chart.

d.      Histograms and bar charts are the same thing.

e.       Histograms always have a numerical scale on the x-axis.

4) Which is true of positively skewed distribution?

a.       The right tail is shorter

b.      The left tail is shorter

c.       The right tail is longer

d.      It has no tail

5) In a right-skewed distribution

a.       The median is greater than the mean

b.      The mode is equal to the mean and median

c.       The median is less than the mean

d.      The mean is less than the mode

6) In positively skewed distributions

a.       Have few extremely high values

b.      Have significantly low values

c.       The mass is concentrated on the right of the distribution

d.      None of above is true

7) In a negatively skewed distribution

a.       the left tail is longer

b.      the right tail is longer

c.       the left tail is shorter

d.      has no tail

8) In a left-skewed distribution

a.       the mean is greater than the median

b.      the mean, median and mode are the same

c.       the mean is lower than the median

d.      the mode is less than the median

9) Which is not true of perfectly symmetrical distributions?

a.       the mean, median and mode are the same

b.      it has mirror symmetry

c.       the tails on either side touches the x-axis

d.      They are uni-modal.

10) "Skewness" means that the distribution of data is

a.       Incorrect

b.      Has extreme values

c.       Symmetrical

d.      Lumpy in the middle

e.       None of the above

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M920864

Have any Question? 


Related Questions in Statistics and Probability

A student working on a summer internship in the economic

A student working on a summer internship in the economic research department of a large corporationstudied the relation between sales of a product (Y , in millions of dollars) and a population (x, in millionsof persons) ...

Attention bias is a natural tendency to focus attention

Attention bias is a natural tendency to focus attention toward certain factors during a social interaction. Attention biases have been demonstrated to affect cognitive processes in humans. How do the environment, genetic ...

Suppose a point in two-dimensional cartesian space is

Suppose a point in two-dimensional Cartesian space, , is equally likely to fall anywhere on the semicircle defined by X 2 + Y 2 = 1 and Y>=0. Find the PDF of Y, f Y (y).

A study was conducted of pleas made by 10261 criminals

A study was conducted of pleas made by 1,0261 criminals. Among those criminals,953 pled guilty, and 396 of them were sentenced to prison. Among the 73 other criminals, who pled not guilty,52 were sent to prison. a. What ...

An ergodic random process has a correlation function given

An ergodic random process has a correlation function given by What is the mean of this process?

1 what differences do you see in the makeup of the crowds

1) What differences do you see in the makeup of the crowds surroundings the pulpits on the two sides of the picture? What point is Cranach trying to make? 2) What views of the Bible are presented in the woodcuts? 3) Exam ...

1 the director of golf for a local course wants to study

1. The Director of Golf for a local course wants to study the number of rounds played by members on weekdays. He gathered the sample information shown below for 520 rounds. At the .05 significance level, is there a diffe ...

Let x be the number of heads observed in five tosses of a

Let X be the number of heads observed in five tosses of a fair coin. Then, X fair dice are thrown. Let Y be the sum of the numbers showing on the dice. Determine the mean and variance of Y.

Discuss the background material leading to the declaration

Discuss the background material leading to the Declaration of Independence. This material breaks down into two areas of ( 1) external and (2) internal factors. Discuss the debate and factors that led to the colonies to f ...

If two events a and b are such that pra is not zero and prb

If two events A and B are such that Pr(A) is not zero and Pr(B) is not zero, what combinations of independent (I), not independent (NI ), mutually exclusive (M ), and not mutually exclusive (NM ) are permissible? In othe ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate