1 which of the following statements are true could be more, Ask an Expert

Statistics

1. Which of the following statements are true? (could be more than one)

A. a single observational study is efficient at identifying and controlling for lurking variables

B. assuming a large population in simple random sampling each individual in the population has the same probability to be selected

C. a survey is a type of observational study.

D. If an explanatory variable and a response variable are correlated, then it can safely be assumed that the explanatory variable causes the response variable.

E. Changes in the response variable can either explain or cause changes in the explanatory variable.

2. Assume X is binomially distributed with n=4 and p=0.8. Calculate P (X<=1)

3. Assume X is binomially distrbuted with n=20 p=0.4 Calculate P (X=7)

4. Suppose X and Y are independent random variables with meanX= 0 varianceX=10 Y= -9 varianceY= 9

W=-2X-4Y. What is the mean and variance of W

5. Let C and D be two events in sample space with P (C)=0.12 P(D)=0.36 P (C&D)=0.03 Determine the conditional probability P(C|D).

6. Can you please have 2 examples each for the experimental and observational study?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91016039

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

You invested 7900 one year ago today it is worth 865490

You invested $7,900 one year ago. Today it is worth $8,654.90. What annual rate of interest did you earn? [use annual compounding]

The probability that a shot will hit the target is 002

The probability that a shot will hit the target is 0.02. Successive shots are independent of each other. What is the probability that at least one out of four shots will hit the target?

Seedlings come in packages of 10 and consist of the

Seedlings come in packages of 10 and consist of the following: 2 Douglas-fir, 3 spruce, and 5 pines. In any given package, how many ways can the 10 seedlings be arranged if seedlings that are the same species cannot be d ...

In a sample of 150 hospital emergency admissions with a

In a sample of 150 hospital emergency admissions with a certain diagnosis, 128 listed vomiting as a presenting symptom. Do these data provide sufficient evidence to indicate, at the .01 level of significance, that the po ...

Choose the correct problem formulation it is known that 70

Choose the correct problem formulation: It is known that 70% of the customers in a sporting goods store purchase a pair of running shoes. A random sample of 25 customers is selected. Assume that customers' purchases are ...

A musical instruments retailer has 10000 point-of-sale

A musical instruments retailer has 10,000 point-of-sale transactions out of which 1500 sales included both items of electric guitars and guitar cases, and out of which 750 had sales of new strings. If the electric guitar ...

The beta corp has decided to enter the next generation in

The BETA Corp. has decided to enter the next generation in customer service. In order to do so they need to purchase a new piece of equipment. The equipment is highly specialized and needs to be created to exact specific ...

Suppose we know the following probabilitiesrepublican

Suppose we know the following probabilities: Republican Democrat Independent Female 0.076 0.191 0.006 Male 0.175 0.013 ? Enter the probability of events Democrat and Female occurring jointly with 3 decimal place accuracy ...

Military often provides a form of qualification test for

Military often provides a form of qualification test for people to enter special career fields. Suppose that a large number of people have taken a test for a certain career field. Suppose that the mean of all people taki ...

State whether each of the following will increase decrease

State whether each of the following will increase, decrease, or have no effect on the population variance. (a) the sum of squares ( SS ) increases This change will increase the population variance. This change will decre ...

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

Recent Questions

Ask Statistics and Probability Expert