Ask Question, Ask an Expert


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

Repeat given exercise using the following aumann model of

Repeat given Exercise, using the following Aumann model of incomplete information with beliefs: N = {I, II}, Y = {1, 2, 3, 4, 5}, F I = {{1, 2}, {3, 4}, {5}}, F II = {{1, 3, 5}, {2}, {4}} P(ω) = 1/5, ∀ ω ∈ Y. for A = {1, ...

Let n y fiiisinn s p be an aumann model of incomplete

Let (N, Y, (F i ) i ∈N , s, P) be an Aumann model of incomplete information with beliefs, and let W ⊆ Y be an event. Prove that (N,W, (F i  ∩ W) i ∈N  , P(· | W)) is also an Aumann model of incomplete information with be ...

Calculated the correlation between outside temperature and

Calculated the correlation between outside temperature and class attendance. The regression equation for the data in that exercise is Attendance = 114.35 - .61 (temperature). Imagine that the weather forecaster predicts ...

In a pulse rate research a simple random sample of 120 men

In a pulse rate research, 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 ...

Exercises -81- for each of the following pairs explain why

Exercises - 8.1- For each of the following pairs, explain why you believe that they are positively related, negatively related, or essentially unrelated. If they are related, identify the dependent variable. a. The cost ...

Part a - excel instructions for chi-square tests carrying

Part A - Excel Instructions for Chi-square Tests Carrying out Chi-square (χ 2 ) tests of independence We are considering prisoner behaviour data. There is a prison with six wings each with 100 prisoners. Prisoner behavio ...

Choose one historical event and discuss the effect that it

Choose one historical event and discuss the effect that it has has on you. Provide a rationale for your response.

Data mining review questions - xlminer labs - cluster

Data Mining Review Questions - XLMiner Labs - Cluster Analysis1. Marketing to Frequent Flyers. The file EastWestAirlinesCluster.xls contains information on 4000 passengers who belong to the airline's frequent flier progr ...

Research objectives to explore correlations between reward

Research Objectives To explore correlations between reward systems and team work attributes in the Saudi Arabian bank sector To explore relationships between reward systems and team work effectiveness in the Saudi Arabia ...

The time spentin days waiting for a kidney transplant for

The time spent(in days) waiting for a kidney transplant for people ages 35-49 can be approximated by the normal distribution, as shown in the figure to the right. (a) What waiting time represents the 99th percentile? (b) ...

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

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