Question: In a memory test, the test subjects are shown 400 objects and are asked after two hours to name the objects. The historical records show

In a memory test, the test subjects are shown 400

objects and are asked after two hours to name the objects. The historical records show that test subjects remember 80

%of the objects after two hours. This symbol (^) is written over the letter(p) not beside.

a.Find the mean of p^ ,where p^ is the proportion of objects that are remembered by a test subject.

b.Find the standard deviation of p^.

c.Compute an approximation for P(p^< 0.83) which is the probability that fewer than 83% of the objects are remembered by a test subject. Round your answer to four decimal places.

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

Question 1 Let Z be a standard normal random variable. Calculate the following probabilities using the calculator provided. Round your responses to at least three decimal places. = P > Z 1.04 = P Z...

In a memory test, the test subjects are shown 625 objects and are asked after two hours to name the objects. The historical records show that test subjects remember 80% of the objects after two...

a Partially Correct Your answer is incorrect. . (a): Your answer is incorrect. . (b): Your answer is incorrect. find In a memory test, the test subjects are shown 625 objects and are asked after two...

In a memory best, the test subjects are shown 606 objects and are asked alter two hours to name the objects. The historical records show that test subjecm remember 60% of the objects after two hours....

In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that of test subjects pass the test. To pass the test, a subject must exactly repeat...

In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that 80% of test subjects pass the test. To pass the test, a subject must exactly...

In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that 60% of test subjects pass the test. To pass the test, a subject must exactly...

In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that 75% of test subjects pass the test. To pass the test, a subject must exactly...

List the department name & deptno for departments having deptno.>=20 EMPNO ENAME 7369 SMITH 7499 ALLEN 7521 WARD 7566 JONES 7654 MARTIN 7698 BLAKE 7782 CLARK 7788 SCOTT 7839 KING 7844 TURNER 7876...

The calcium line of wavelength = 422.673 nm (P S) exhibits normal Zeeman splitting when placed in uniform magnetic field of 4 webers/meter?. Calculate the wavelength of three components of normal...

6. Which of the following correctly shows the electric field around a negative charge? A Fig. 4B.40 B C D

On 1 March 2007 DB Limited issued R560 000 15% debentures at R98. The debentures were to be redeemed at par in four equal annual payments starting 28 February 2010. Required: Journalise the above...