Question: please help Question 9 (5 points) 68% of all grades on a certain test were between 50 and 90. Assuming the data is normally distributed,

please help

Question 9 (5 points) 68% of all grades on a certain test were between 50 and 90. Assuming the data is normally distributed, what is the mean? ( 1) 76 ( 2) 72 ( 3) 70 ( 4) 88 Question 10 (5 points) 95% of the grades on a test were between 60 and 84. Assuming the data is normally distributed, what is the standard deviation of the scores? ( 1) 4 ( 2) 10 ( 3) 6 ( 4) 8

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!

Medicare/Medicaid Blue Cross/Blue Shield Universal Health 64 69 96 22 64 55 59 68 65 85 48 50 34 48 37 87 27 48 70 84 43 45 107 63 72 63 39 67 59 89 75 73 28 94 4 33 54 91 65 85 59 89 78 54 95 58 87...

EM561 HW2 1. Given a set of 9 sample observations: 79, 100, 75, 83, 82, 85, 84, 79, 90. a) Calculate the sample mean; b) Calculate the sample variance and sample standard deviation; c) Calculate the...

I need your help. This HM is due tomorrow at 4:00pm Spring 2016 - EBF 304W Homework 2 Due: 5:00pm on Friday, 12 February 2016 (via ANGEL) 50 points Instructions: Please answer all questions clearly...

MGCR 271- MCGILL UNIVERSITY: ASSIGNMENT #2- FALL 2017 PROFESSOR: WEI QI Due Date October 23 Monday at the beginning of class. (Print, do not email). No late submissions accepted. Instructions Please...

Question 1 (8 points) The following table is the probability distribution of the number of orders a household places from a catalogue. Number of Orders (x) Probability of x Orders f(x) 0 0.40 1 0.30...

Homework: 12.5 Homework Question 17, 12.5.39 HW Score: 90.91%, 20 Points: 0 of 1 Save would have IQs between 102 and 117? A large company employs workers whose IQs are distributed normally with mean...

Please help me with these questions C webassign.net water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo MY NOTES ASK YOUR TEACHER 3. [-/5 Points] DETAILS MENDSTAT14 7.E.045. An...

Need help with this quiz for accounting. document attatched Quiz Note: It is recommended that you save your response as you complete each question. Directions: This quiz tests how well you understand...

DWC, LLC had $375.760 of accounts receivable and $782.160 in sales during the year. The December 31st balance, before any adjustments, for the Allowance for Doubtful Accounts is $1.400 (debit...

Suppose that X has a lognormal distribution with parameters = 0 and w2 = 4. Determine the following: (a) P(10

In managerial accounting, _ _ _ _ _ _ _ _ can be a reasonable approximation of marginal cost in many situations. Question content area bottom Part 1 A . step cost B . mixed cost C . variable cost D ....

Prove that the following languages are not regular. You may use the pumping lemma and the closure of the class of regular languages under union, intersection, and complement. a. {0 n 1 m 0 n | m, n ...

One goal of object-oriented design is to facilitate reusability of code. Discuss how using an object-oriented tool would help to adapt the automobile-purchasing system discussed in the book to a...

For the operations on partially filled arrays below, provide the header of a method. Do not implement the methods. a. Sort the elements in decreasing order. b. Print all elements, separated by a...

Water flows in a two-dimensional channel of width W and depth D as shown in the diagram. The hypothetical velocity profile for the water is where V s is the velocity at the water surface midway...

For the circuit shown, find the current I. The circuit for this exercise is given in the table. | = 15 A 100. 2 100. 12V Exercise 1 Exercise 2 1 = 1.5 A R R 12V 12V Exercise 3 Exercise 4 1 = 50. A R...

When considering the Pepsi in India case, what advice would you give Pepsi, given what you learned from the Foreign Market Entry Timing paper?

1. Set a personal goal for yourself in your work situation. Examine this goal in the light of the 10 factors to achieve goals.

4. Set up at least one work role that is important for you to master. Reflect on how you can use your time more efficiently, not necessarily spend more time, to perform better in this work role.

3. List four goals that are important to you. Then set up the roles that correspond to these goals. How will you shape your personal vision as a result of your goals and roles?