If the probability a student scored an A on a test was .15, how many students...
If the probability a student scored an A on a test was .15, how many students in a class of 25 would you expect to receive an A?
- 1 b. 4 c. 7 d. 15
Homework Answers
Given,
n=25,p=0.15
The number of students we expect to receive an A
= n*p
= 25*0.15
=3.75
=4
Option (b) is correct.
Add Answer to:
If the probability a student scored an A on a test was .15, how
many students...
4. Suppose that 75% of the students in a large class know how to answer a...
4. Suppose that 75% of the students in a large class know how to answer a particular test question correctly. You take a random sample of n = 5 student exams from the class. (a) What is the probability that none of the 5 students answered the test question correctly? (b) If the instructor gives no partial credit. 4 points for a correct answer and 0 points for an incorrect answer, i. What are the mean and standard deviation of...
If there were 500 students in Jamal’s class, approximately how many actual students scored higher than...
If there were 500 students in Jamal’s class, approximately how many actual students scored higher than Jamal on the quiz if Jamal had a z-score of -1? 250 340 420 490
Suppose that 4% of the 2 million high school students who take the SAT each year...
Suppose that 4% of the 2 million high school students who take the SAT each year receive special accommodations because of documented disabilities. Consider a random sample of 25 students who have recently taken the test. (Round your probabilities to three decimal places.) (a) What is the probability that exactly 1 received a special accommodation? (b) What is the probability that at least 1 received a special accommodation? (c) What is the probability that at least 2 received a special...
1. Suppose in a class of 100 students who took an exam scored out of 100,...
1. Suppose in a class of 100 students who took an exam scored out of 100, the 68thpercentile of the exam scores was 72. Thus, _________% of the students who took the exam scored less than a 72. a.32% b.68% c.72% d.28% e.None of the above 2. Suppose in a class of 80 students who took an exam scored out of 100, the 40thpercentile of the exam scores was 58. Approximately how many of the 80 students scored above a...
Suppose we have assigned grades for the 11 students in our data: Grade A for Students...
Suppose we have assigned grades for the 11 students in our data: Grade A for Students who scored ≥ 90; B for students who scored ≥ 80 and < 90; C for students who scored ≥ 70 and < 80; D for students who scored ≥ 60 and < 70; F for students that scored < 60. Following the grade scheme, 7 students received an A; 1 student received a B; 0 students received a C; 0 students received a...
For Test #1 in an undergraduate statistics course, 191 students completed the exam. The mean score...
For Test #1 in an undergraduate statistics course, 191 students completed the exam. The mean score was 75.8, and the standard deviation was 10.0. This is pretend data. Using this data and the z-score distribution provided in class, answer the following questions. Be sure to give your answer in the units requested. Report all answers to two decimal places if answer involves decimals. -I mostly need help with (e-p), but it would still help to go over (a-d). (a) How...
3. Interpret the following line plot: 40 50 60 70 80 90 100 Student Score on Math Test a. How man...
Question 3 and 4
3. Interpret the following line plot: 40 50 60 70 80 90 100 Student Score on Math Test a. How many student scores are recorded on the line plot? b. What was the highest score? What was the lowest score? c. How many students scored 70 or higher? d. What was the most frequent score? Which types of graphs (including stem-and-leaf) could be made with the following data sets? Justify your answers. a. the responses of...
Combinations (Counting the Subsets) a) How many different teams of five students can be chosen from...
Combinations (Counting the Subsets) a) How many different teams of five students can be chosen from the 32 students in a class? b)How many of the possible teams would include the youngest student in this class? c)How many of the possible teams would not include the youngest student in this class?
THINKING/COMMUNICATION 7. A post-secondary class has 600 students. The mean grade on their midterm exam is...
THINKING/COMMUNICATION 7. A post-secondary class has 600 students. The mean grade on their midterm exam is 70%, with a standard deviation of 15. a. Find the Z-score of a student who scored 80% on his exam. [2 marks] b. Find the percentage of students who failed the exam. [3 marks] c. How many students failed the exam (i.e. scored less than 49%)? [1 mark] d. Your friend claims he scored in the 99th percentile on his exam. What mark must...
Each year about 1500 students take the introductory statistics course at a large university. This year...
Each year about 1500 students take the introductory statistics course at a large university. This year scores on the nal exam are distributed with a median of 74 points, a mean of 70 points, and a standard deviation of 10 points. There are no students who scored above 100 (the maximum score attainable on the nal) but a few students scored below 20 points. (a) Is the distribution of scores on this nal exam symmetric, right skewed, or left skewed?...
4. Suppose that 75% of the students in a large class know how to answer a particular test question correctly. You take a random sample of n = 5 student exams from the class. (a) What is the probability that none of the 5 students answered the test question correctly? (b) If the instructor gives no partial credit. 4 points for a correct answer and 0 points for an incorrect answer, i. What are the mean and standard deviation of...
Question 3 and 4
3. Interpret the following line plot: 40 50 60 70 80 90 100 Student Score on Math Test a. How many student scores are recorded on the line plot? b. What was the highest score? What was the lowest score? c. How many students scored 70 or higher? d. What was the most frequent score? Which types of graphs (including stem-and-leaf) could be made with the following data sets? Justify your answers. a. the responses of...
THINKING/COMMUNICATION 7. A post-secondary class has 600 students. The mean grade on their midterm exam is 70%, with a standard deviation of 15. a. Find the Z-score of a student who scored 80% on his exam. [2 marks] b. Find the percentage of students who failed the exam. [3 marks] c. How many students failed the exam (i.e. scored less than 49%)? [1 mark] d. Your friend claims he scored in the 99th percentile on his exam. What mark must...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago