One college class had a total of

8080

students. The average score for the class on the last exam was

83.983.9

with a standard deviation of

5.85.8.

A random sample of

3232

students was selected.

a. Calculate the standard error of the mean.

b. What is the probability that the sample mean will be less than

8585​?

c. What is the probability that the sample mean will be more than

8484​?

d. What is the probability that the sample mean will be between

82.582.5

and

84.584.5​?

a. The standard error of the mean is

nothing.

​(Round to two decimal places as​ needed.)

b. The probability that the sample mean will be less than

8585

is

nothing.

​(Round to four decimal places as​ needed.)

c. The probability that the sample mean will be more than

8484

is

nothing.

​(Round to four decimal places as​ needed.)

d. The probability that the sample mean will be between

82.582.5

and

84.584.5

is

nothing.

​(Round to four decimal places as​ needed.)

A recent study found that 56% of workers between the ages of 20-29 cash out their retirement accounts when they lose their jobs or move to a new employer. Complete parts a through e below based on a random sample of 14 workers between the ages of 20-29 who lost their jobs or changed employers.

1. What is the probability that exactly 3 workers cashed out their retirement accounts? The probability is_________. (Round to four decimal places as needed.)
2. What is the probability that all 14 workers from the sample cashed out their retirement accounts? The probability is_________.(Round to four decimal places as needed.)
3. What is the probability that 11 or fewer workers cashed out their retirement accounts? The probability is _________(Round to four decimal places as needed.)
4. What are the mean and standard deviation for this distribution?
   1. The mean is _________(Type an integer or a decimal.)
   2. The standard deviation is ___________. (Round to four decimal places as needed.

One college class had a total of 80 students. The average score for the class on the last exam was 83.9 with a standard deviation of 5.8. A random sample of 32 students was selected. a. Calculate the standard error of the mean. b. What is the probability that the sample mean will be less than 85​? c. What is the probability that the sample mean will be more than 84​? d. What is the probability that the sample mean will be between 82.5 and 84.5​? a. The standard error of the mean is nothing. ​(Round to two decimal places as​ needed.) b. The probability that the sample mean will be less than 85 is nothing. ​(Round to four decimal places as​ needed.) c. The probability that the sample mean will be more than 84 is nothing. ​(Round to four decimal places as​ needed.) d. The probability that the sample mean will be between 82.5 and 84.5 is nothing. ​(Round to four decimal places as​ needed.)

1. Imelda has a large collection of shoes. She has 20 pairs of sneakers of which: 9 pairs are canvas and 11 are leather; 8 pairs are white, 7 are black, and 5 are red; 5 pairs are white and canvas, 1 pair is black and canvas, and 2 pairs are red and leather. Suppose Imelda selects a pair of sneakers at random from this collection of 20 pairs.

a) What is the probability that she selects a red canvas pair?

b) Given that the pair she selected is canvas, what is the probability that they are red?

c) Given that the pair she selected is red, what is the probability that they are canvas?

d) What is the probability that she selects a white leather pair?

e) Given that the pair she selected is white, what is the probability that they are leather?

f) Given that the pair she selected is leather, what is the probability that they are white?

The probability of state in boom economy is 20%. The rate of stock return is 20% and the bond rate of return is 10%.

The probability of state in normal good growth economy is 25%. The stock rate of return is 10% and the bond rate of return is 5%

The probability of state in normal growth economy is 15%. The stock rate of return is 3% and the bond rate of return is 5%

The probability of state in normal bad growth economy is 25%. %. The stock rate of return is 0 and the bond rate of return is 5%.

The probability of state in recession economy is the rest of probabilities. The stock rate of return is -15%(negative) and the bond rate of return is - 2%(negative).

Q1: what is the probability of state in recession economy? (percentage)

Q2: what is the expected rate of return on both assets.?

Q3: what is the variance of both assets?

Q4: what is the standard deviation of both asset?

3.

In an international ballroom dancing competition, competitors are scored by a panel of judges on a scale from 0 to 100. The final score for each couple is computed as the average of the scores from all the judges. However, if the number of judges is equal to or greater than 6, and the highest score is given by only one judge, that score is excluded from computing the average. The same applies to the lowest score.

1. Write a method countOccurrences that returns the number of occurrences of a given target value in a given array. Complete the method countOccurrences below.

   Question 3(a) /** Returns the number of times target occurs among the values * in the given array * @param scores an array of values * @param target the target value * @return the number of times target appears among the * values in scores */ public static int countOccurrences(int[] scores, int target)

2. Write a method findMaxAndMin that takes an array scores as a parameter and returns an array of length two, where the first element is the maximum value in scores and the second element is the minimum value in scores. Complete the method findMaxAndMin below.

   Question 3(b) /** Returns an array of two elements in which * the first element is the maximum value in scores and * the second element is the minimum value in scores * Precondition: scores.length > 0; 0 <= scores[k] <= 100 */ public static int[] findMaxAndMin(int[] scores)

3. Write a method averageScore that takes an array scores as a parameter and computes and returns the average score. However, if the size of the array scores is 6 or greater, and the maximum value occurs only once in the array, that value is excluded from computing the average. The same is done for the minimum value.

   In writing this method, assume that the methods countOccurrences from Part (a) and findMaxAndMin from Part (b) work as specified, regardless of what you wrote there. You may not receive full credit if instead of calling these methods you write equivalent code here. Complete the method averageScore below.

   Question 3(c) /** Returns the average of the values in scores. However, * if the size of the array scores is not less than 6 and * the largest value occurs only once in scores, that value * is excluded from computing the average; the same for * the smallest value. * Precondition: scores.length >= 3; 0 <= scores[k] <= 100 */ public static double averageScore(int[] scores)

PROGRAM MUST BE WRITTEN IN JAVAFX

Develop a program flowchart and then write a menu-driven Java program that will solve the following problem. The program uses one and two-dimensional arrays to accomplish the tasks specified below. The menu is shown below. Please build a control panel as follows: (Note: the first letter is shown as bold for emphasis and you do not have to make them bold in your program.)

Help SetParams FillArray DisplayResults Quit

Upon program execution, the screen will be cleared and the menu shown above will appear at the top of the screen and properly centered. The menu items are explained below. Note, that upon execution of the program only options Help, SetParams, and Quit will be functional. You need to use a bool type variable flags to check for the proper states.

H or h(for Help) option will invoke a function named help( ) which will display a help screen. The help screen(s) should guide the user how to interact with the program, type of data to be entered, and what results would the program produce. Each help screen should remain on the screen until the user strikes any key (e.g., strike the space bar followed by a carriage return). Once the user strikes a key, the screen will be cleared and the menu is displayed again.

S or s (for SetParams ) option will prompt the user for the number of students and the number of quizzes in a course. The number of students can be up to 50 and the number of quizzes can be up to 5. That is, you need to size arrays that can handle up to these limits. The user’s input needs to be checked against these limits. If they are out of range, the program needs to issue a message and prompt the user again without terminating the program. Once this option is successfully completed, the screen will be cleared and the menu is displayed again.

F or f (for FillArray ) option will be invoked after option SetParams. Your program will check for this. If this option is exercised before SetParams, the program must provide informational warning to the user, wait for the user to read the message, and then allow the user to strike a key, where the program clears the screen and displays the menu again. Once option SetParams is exercised, the program will fill the array with the following constraints: Student number (or ID) is a five-digit integer value starting at 75678 and increments by one for each student in the class (i. e., 75679, 75680, etc.), and the scores in each quiz is an integer number, randomly generated by the program, in the range of 0 to 100, inclusive. Once this task is completed, the program will issue the message “Data entry completed…” and allows the user to read the message, strike a key, which causes the screen to clear, followed by the menu display. Under no circumstances should the task be done in the main() function. The main() will delegate the tasks to other functions specified by you, the code developer.

D or d (for Display Results) option will be invoked after option FillArray. Your program will check for this. If this option is exercised before FillArray, the program must provide informational warning to the user, wait for the user to read the message, and then allow the user to strike a key, where the program clears the screen and displays the menu again. Once option FillArray is exercised, the program will compute the following parameters for the array of quizzes with constraints as specified below: This option computes the lowest, the highest, average, and Medium (sort the array in ascending order, and picking the middle element of the sorted array) for each quiz. The option displays the tabulated quiz array showing the rows and columns with proper labels. The following is an example you can employ in your program. The example is shown for 4 students and 3 quizzes.

Student ID Quiz 1 Quiz 2 Quiz 3

75678

75679

75680

75681

The results for each quiz should be tabulated and listed as well. The following is an example of output format you can follow.

Quiz 1:

Lowest: xx

Highest: xx

Average: xx.xx

Medium x

where x represents a place holder for the actual digit.

Once the user entered a key, the screen will be cleared and the menu is displayed again

Q or q (for Quit) option will clear the screen and returns the control to the Operating System

PROGRAM MUST BE WRITTEN IN JAVAFX (Chapter 12 Starting Out With Java 7th edition Tony Gaddis)

In a small pond there are five lily pads in a circle labeled 1 through 5. A frog is sitting on pad 1.
When the frog is on pad n, it will jump to right pad with probability 1/2 and to left pad with probability 1/2.
Each jump is independent of the previous jumps.
What is the probability that the frog will return to pad 1 with jumping 7 times?
What is the probability that the frog will return to pad 1 with jumping n times? n -> limit