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

Use a fast food restaurant and for 5 types of food from the

Use a fast food restaurant and for 5 types of food from the restaurant, list the fat grams and its total calories. Is there a linear relationship between the two variables? The double whopper has 900 calories and 56 gram ...

1 what is the relationship between confounding and internal

1. What is the relationship between confounding and internal validity? 2. What are experimenter expectancy effects, and how do researchers minimize them? 3. Should demand characteristics be eliminated or strengthened in ...

Assignment- sampling distributions and estimation

Assignment- Sampling Distributions and Estimation; Hypothesis Testing 1. In a simple random sample from a population of several hundred that's approximately normally distributed, the following data values were collected. ...

Describe the following game with incomplete information as

Describe the following game with incomplete information as an extensive-form game. There are two players N = {I, II}. Each player has three types, TI = {I 1 , I 2 , I 3 } and TII = {II 1 , II 2 , II 3 }, with common prio ...

A statisticsnbspinstructor at a large western university

A statistics instructor at a large western university would like to examine the relationship (if any) between the number of optional homework problems students do during the semester and their final course grade. She ran ...

Reading journal assignment stage iifor this portion of the

Reading Journal Assignment Stage II For this portion of the journal, you will create five journal entries, each addressing the prompts given below. Each entry will be one page in length, double spaced, with 12 point font ...

1 in what ways are experimental research designs preferable

1. In what ways are experimental research designs preferable to correlational or descriptive designs? What are the limitations of experimental designs? 2. What is the purpose of random assignment to conditions? 3. Descri ...

An alternative to the experiment in q3 to investigate

An alternative to the experiment in Q.3 to investigate whether loud music tends to increase the time it takes mice to complete a maze would involve randomly assigning say, 50 mice to two groups. The 25 mice in Group A (c ...

A simple random sample of 120 men results in a mean of 80

A simple random sample of 120 men results in a mean of 80 beats per minute, and a standard deviation of 11 beats per minute. Based on the sample results, the researcher concludes that the pulse rates of men have a standa ...

When researchers set their alpha level at 05 they reject

When researchers set their alpha level at .05, they reject the null hypothesis (and conclude that the independent variable has an effect) only if there is less than a 5% chance that the differences among the means are du ...

  • 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

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen