Essentials of Statistics for The Behavioral Sciences (MindTap Course List)
9th Edition
ISBN: 9781337098120
Author: Frederick J Gravetter, Larry B. Wallnau, Lori-Ann B. Forzano
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 5, Problem 21P
For each of the following, identify the exam score that should lead to the better grade. In each case, explain your answer.
- a. A score of X – 70, on an exam with M – 82 and σ = 8; or a score of X =60 on an exam with μ = 72 and σ = 12.
- b. A score of X – 58, on an exam with μ – 49 and σ = 6; or a score of X =85 on an exam with μ = 70 and σ = 10.
- c. A score of X – 32, on an exam with μ – 24 and σ = 4; or a score of X =26 on an exam with μ = 20 and σ = 2.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
for qs 27 option b, how do we get the value of SSE in this case ?
For each of the following, identify the exam score that should lead to the better grade.
A score of X = 70 on an exam with µ = 82 and σ = 8, or a score of X = 60 on an exam with µ = 72 and σ = 12?
X = 70 corresponds to z =
, and X = 60 corresponds to z =
Therefore
Independent surveys show that the average IQ of 9 r/s babies exposed to cocaine in the uterus is 81 with s.d. 18, while the average IQ of 20 r/s babies unexposed to cocaine in the uterus is 99 with s.d. 9. Construct a 90% c.i. for the difference between the overall average IQs of exposed and unexposed babies. Assume that both populations are normal.
Chapter 5 Solutions
Essentials of Statistics for The Behavioral Sciences (MindTap Course List)
Ch. 5.2 - What location in a distribution corresponds to z =...Ch. 5.2 - For a population with = 80 and = 12, what is the...Ch. 5.2 - For a sample with M 72and s 4, what is the X...Ch. 5.3 - In a population with = 60. a score of X = 58...Ch. 5.3 - In a sample with a standard deviation of s = 8, a...Ch. 5.3 - Prob. 3LCCh. 5.3 - Prob. 4LCCh. 5.4 - Prob. 1LCCh. 5.4 - A sample with a mean of M = 50 and a standard...Ch. 5.4 - Which of the following is an advantage of...
Ch. 5.4 - Last week Sarah had exams in math and in Spanish....Ch. 5.5 - A set of scores has a mean of = 63 and a standard...Ch. 5.5 - A distribution with = 35 and = 8 is being...Ch. 5.5 - Using z-scores, a sample with M = 37 and s = 6 is...Ch. 5.6 - For the past 20 years, the high temperature on...Ch. 5.6 - A Score of X = 73 is obtained from a population....Ch. 5.6 - Under what circumstances would a score that is 15...Ch. 5 - Explain how a z-score identifies an exact location...Ch. 5 - For a population with a standard deviation of =...Ch. 5 - For a sample with a standard deviation of s = 12....Ch. 5 - For a population with = 40 and = 8: a. Find the...Ch. 5 - For a population with = 80 and = 9. find the...Ch. 5 - A sample has a mean of M = 90 and a standard...Ch. 5 - A sample has a mean of M =60 and a standard...Ch. 5 - R. Fine the-. z-score corresponding to a |score of...Ch. 5 - Fine the x value corresponding to z. - 0.75 for of...Ch. 5 - Find the z-score corresponding to X 40 and the X...Ch. 5 - Find the e-score corresponding to X = 24 and the X...Ch. 5 - A score that is 12 points below the mean...Ch. 5 - A score that is 20 points above the mean...Ch. 5 - For a population with a standard deviation of =...Ch. 5 - For a population with a mean of = 45, a score of...Ch. 5 - For a sample with a standard deviation of s 6, a...Ch. 5 - For a sample with a mean of M - 63, a score of X =...Ch. 5 - In a population distribution, a score of X = 57...Ch. 5 - In a sample distribution, a score of V 21...Ch. 5 - A distribution of exam scores has a mean of = 42....Ch. 5 - For each of the following, identify the exam score...Ch. 5 - A population with a mean of = 41 and a standard...Ch. 5 - A sample with a mean of M = 62 and a standard...Ch. 5 - A population consists of the following N 6...Ch. 5 - A sample consists of the Following n = 5 scores:...Ch. 5 - For each of the following populations, would a...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- for the following question above help me solve d and earrow_forwardBefore calculating the exact x value with 72% of the values less than it, we are certain that x is _______. A. smaller than mean 3 B. equal to mean 3 C. Larger than mean 3arrow_forwardI do a Bonferroni correction and I want to make a four tests, I assume a .05 level of signifance to start. What is my new alpha level? A. .05 B. .10 C. .125 D. Impossible to calculate without more informationarrow_forward
- For the following image before, solve for x (round to the nearest tenth)arrow_forwardResearchers wanted to determine whether fence lizards learned to avoid fire ants. To determine this, they gathered lizards from eastern Arkansas (where there were no fire ants), and from southern Alabama (which had been invaded by fire ants). The lizards were then exposed to fire ants, and researchers measured how long (in seconds) it took the lizards to flee. Suppose that mu_I is the average time to flee for a lizard that lives in the invaded areas in Alabama, and mu_U is the average time to flee for a lizard living in the uninvaded areas of Arkansas. When the data is loaded into the correct tool in StatKey, and the "Generate 1000 samples" button is clicked, here is what StatKey generates:- see image. The researchers observed that the lizards from Alabama had an average response time of 32 seconds, and the lizards from Arkansas had an average response time of 44 seconds. Using this, which of the following is closest to the P-value for this hypothesis test? What conclusions can we make…arrow_forwardResearchers wanted to determine whether fence lizards learned to avoid fire ants. To determine this, they gathered lizards from eastern Arkansas (where there were no fire ants), and from southern Alabama (which had been invaded by fire ants). The lizards were then exposed to fire ants, and researchers measured how long (in seconds) it took the lizards to flee. Suppose that mu_I is the average time to flee for a lizard that lives in the invaded areas in Alabama, and mu_U is the average time to flee for a lizard living in the uninvaded areas of Arkansas. The researchers are interested in understanding if lizards from invaded areas are faster to flee when exposed to ants. What should they use for their hypotheses? H0:μI−μU= HA:μI−μU What are the hypothesis and null hypothesis answers? And how did you get the hypothesis and null hypothesis without any numbers?arrow_forward
- For the image attached, how am I supposed to solve for x and substitute to determine the measure of ∠UTB?arrow_forwardOut of 100 doctors in Group A, none knew about the drug at time t = 0, but 66 of them were familiar with the drug after 13 months. Find the formula for f (t).arrow_forwardFor two independent lives age 40, you are given that mu40(t) = 80-t for t< 60. Calculate Var(T40:40).arrow_forward
- Shannon conducts a study and tells you that when she calculated Cohen's d , it was 0.00. What conclusion would you reach about the effects of her independent variable?arrow_forwardWhich of the following describes a spurious relationship between X, Y, and Z? Select one: a. Z causes X, which causes Y b. Z has no effect on the relationship between X and Y c. Z causes both X and Y d. X causes Z, which causes Yarrow_forwardIn a class in which the final course grade depends entirely on the average of four equally weighted 100-point tests, Kelly has scored 9585, and 74on the first three. What range of scores on the fourth test will give Kelly a C for the semester (an average between 70and 79, inclusive)? Assume that all test scores have a non-negative valuearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal LittellAlgebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:Cengage
Algebra: Structure And Method, Book 1
Algebra
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:McDougal Littell
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:9781133382119
Author:Swokowski
Publisher:Cengage
Continuous Probability Distributions - Basic Introduction; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=QxqxdQ_g2uw;License: Standard YouTube License, CC-BY
Probability Density Function (p.d.f.) Finding k (Part 1) | ExamSolutions; Author: ExamSolutions;https://www.youtube.com/watch?v=RsuS2ehsTDM;License: Standard YouTube License, CC-BY
Find the value of k so that the Function is a Probability Density Function; Author: The Math Sorcerer;https://www.youtube.com/watch?v=QqoCZWrVnbA;License: Standard Youtube License