City sheriffs use exams as part of their promotion process and officers have to score higher...
City sheriffs use exams as part of their promotion process and officers have to score higher than 80% of those taking the test to be considered for promotion. Officer #1 receives a raw score of 74 and Officer #2 receives a raw score of 68. The mean of all the exam scores is 65 with a standard deviation of 9. Assume exam scores are normally distributed.
a)Calculate the z score for Officer #1. Will he be promoted?
b)Calculate the z score for Officer #2. Will she be promoted?
Please give the z score for each officer's exam and the result.
Homework Answers
Add Answer to:
City sheriffs use exams as part of their promotion process and
officers have to score higher...
A set of final examination grades in an introductory statistics course is normally distributed, with a...
A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 73 and a standard deviation of 7. Complete parts (a) through (d). a. What is the probability that a student scored below 86 on this exam? (Round to four decimal places as needed.) b. What is the probability that a student scored between 66 and 93? (Round to four decimal places as needed.) c. The probability is 55% that a student taking...
just the last ones on this A trucking company determined that the distance traveled per truck...
just the last ones on this
A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 80 thousand miles and a standard deviation of 10 thousand miles. Complete parts (a) through (c) below. a. What proportion of trucks can be expected to travel between 69 and 80 thousand miles in a year? The proportion of trucks that can be expected to travel between 69 and 80 thousand miles in a year...
Scores on Professor Combs Statistics Final Exams have a long term history of being normally distributed with a mean of μ=70 and a standard deviation of σ=8
Scores on Professor Combs Statistics Final Exams have a long term history of being normally distributed with a mean of μ=70 and a standard deviation of σ=8 a.) Find the probability that a single student will score above a 75 on the Final exam. b.) Find the probability that a single student will score between a 65 and 75 on the Final exam. c.) Find the probability that an entire class of 20 students will have a class average above a 75 on...
Candidates are applying for an elite college. From prior statistics we know that white students have...
Candidates are applying for an elite college. From prior statistics we know that white students have an acceptance rate of 24% while Asian students have an acceptance rate of only 17%. A random sample of 100 White students and 100 Asian students were selected. Let X be the number of White applicants (out of the 100) who are accepted. Let Y be the number of Asian applicants (out of the 100) who are accepted. Question 1 of 4 Which of...
Final Exam 1/13/19 Nam If two distributions have the same range, then what must be a)...
Final Exam 1/13/19 Nam If two distributions have the same range, then what must be a) their high and low data values b) the entire distributions (e) their standard deviations d) the difference between their high and low data values e) their means 1. In a skewed distribution, the median is preferred over the mean as a measure of the center because a) the median is the most frequent number b) the mean may be too heavily influenced by outliers...
Can someone answer 7-11 please Final Exam 1/13/19 Nam If two distributions have the same range,...
Can someone answer 7-11 please
Final Exam 1/13/19 Nam If two distributions have the same range, then what must be a) their high and low data values b) the entire distributions (e) their standard deviations d) the difference between their high and low data values e) their means 1. In a skewed distribution, the median is preferred over the mean as a measure of the center because a) the median is the most frequent number b) the mean may be...
5-8 show work 5. 6. At a local high school 5000 juniors and seniors recently took...
5-8 show work
5. 6. At a local high school 5000 juniors and seniors recently took an aptitude test. The results of the exam were normally distributed with mean - 450 and o = 50. Calculate the following: a. The PERCENT of students to the nearest tenth of a percent that scored over 425 b. The number of students that scored more than 475 c. The probability of a student selected at random having scored between 400 and 575 A...
1. Ms. Jackson has three sections of the course "Introduction to Statistics.” The midterm results reveal...
1. Ms. Jackson has three sections of the course "Introduction to Statistics.” The midterm results reveal that class A has an average of 82, class B has an average of 88, and class C has an average of 92. If there were 20 students in class A, 25 students in class B, and 27 students in class C, what is the combined mean (the average for all the three classes)? Show your work. 2. In your Biology class, your final...
1) Come up with a single (one) question or problem 2) Think of an example with 30 data points a. ...
1) Come up with a single (one) question or problem
2) Think of an example with 30 data points
a. This data needs to be of a quantitative variable
(numbers).
3) Then proceed to follow the below steps.
example of 30 quantitative data points
Purpose
State how, when, and where data was collected
List of raw data pairs
Frequency distribution (table)
Histogram
Relative percentage polygon
Sample mean
Sample median
Sample mode(s)
Sample range
Sample variance
Sample standard deviation
Coefficient of...
Which Test those cases should use? A: one sample z-test B: one-sample t-test C: t-test for the...
Which Test those cases should use? A: one sample z-test B: one-sample t-test C: t-test for the difference between means for two related samples D: t-test for the difference between means for two independent samples with homogeneity of variance E: t-test for the difference between means for two independent samples with heterogeneity of variance F: a one sample z-test for proportions (or a chi-square goodness of fit) G: chi-square goodness of fit only (where a one sample z-test of proportions isn’t appropriate) H: a two-sample z-test...
just the last ones on this
A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 80 thousand miles and a standard deviation of 10 thousand miles. Complete parts (a) through (c) below. a. What proportion of trucks can be expected to travel between 69 and 80 thousand miles in a year? The proportion of trucks that can be expected to travel between 69 and 80 thousand miles in a year...
Final Exam 1/13/19 Nam If two distributions have the same range, then what must be a) their high and low data values b) the entire distributions (e) their standard deviations d) the difference between their high and low data values e) their means 1. In a skewed distribution, the median is preferred over the mean as a measure of the center because a) the median is the most frequent number b) the mean may be too heavily influenced by outliers...
Can someone answer 7-11 please
Final Exam 1/13/19 Nam If two distributions have the same range, then what must be a) their high and low data values b) the entire distributions (e) their standard deviations d) the difference between their high and low data values e) their means 1. In a skewed distribution, the median is preferred over the mean as a measure of the center because a) the median is the most frequent number b) the mean may be...
5-8 show work
5. 6. At a local high school 5000 juniors and seniors recently took an aptitude test. The results of the exam were normally distributed with mean - 450 and o = 50. Calculate the following: a. The PERCENT of students to the nearest tenth of a percent that scored over 425 b. The number of students that scored more than 475 c. The probability of a student selected at random having scored between 400 and 575 A...
1. Ms. Jackson has three sections of the course "Introduction to Statistics.” The midterm results reveal that class A has an average of 82, class B has an average of 88, and class C has an average of 92. If there were 20 students in class A, 25 students in class B, and 27 students in class C, what is the combined mean (the average for all the three classes)? Show your work. 2. In your Biology class, your final...
1) Come up with a single (one) question or problem
2) Think of an example with 30 data points
a. This data needs to be of a quantitative variable
(numbers).
3) Then proceed to follow the below steps.
example of 30 quantitative data points
Purpose
State how, when, and where data was collected
List of raw data pairs
Frequency distribution (table)
Histogram
Relative percentage polygon
Sample mean
Sample median
Sample mode(s)
Sample range
Sample variance
Sample standard deviation
Coefficient of...
Most questions answered within 3 hours.
-
could someone please post clear drawings of the three structures
in the equilibrium mixture of D-glucose...
asked 56 seconds ago -
What is experiential learning and how is it helpful for teaching
leadership, and interpreting group dynamics?...
asked 3 minutes ago -
A security awareness policy defines the responsibilities of
managers and information owners.
True
False
asked 5 minutes ago -
Using the Properties of Order show that 5n5 +
4n4 + 6n3 + 2n2+ n +...
asked 4 minutes ago -
which is the equilibrium expression for the reaction
3A(g)+4B(g)<---> 2C(g)+5D(g)
asked 6 minutes ago -
Create a balanced compensation plan that you feel would
encourage a restaurant manager to be more...
asked 13 minutes ago -
Re: Human Physiology
Comment on the differences between representing V02 max as an
absolute number and...
asked 16 minutes ago -
A firm with a WACC of 10% is considering the following mutually
exclusive projects:
0
1...
asked 21 minutes ago -
. A 100.0 mL sample of 0.18 M HClO4 is titrated with 0.27 M
LiOH. Determine...
asked 44 minutes ago -
A regression equation that describes the relationship between
the amount of the bill ($) at a...
asked 1 hour ago -
exercise on VSEPR and molecular structrue.
octahedral
SeCl62-
TeCl62-
ClF62-
distorted
SeF62–
IF6–
asked 2 hours ago -
284 mL of a 0.52 M potassium hydroxide solution is added to 467
mL of a...
asked 2 hours ago