Mrs. Allenson wanted to know to how many students in her class had brothers or sisters;...
Mrs. Allenson wanted to know to how many students in her class had brothers or sisters; out of her 50 students, 22 students said that they had a brother (B) and 38 students had a sister (S).
A. What are the changes that a randomly selected study has both a brother and a sister?
B. Calculate (B | A)
Homework Answers
Add Answer to:
Mrs. Allenson wanted to know to how many students in her class
had brothers or sisters;...
Mrs. Allenson surveyed her 50 students in her class on which subjects were their hardest? 23...
Mrs. Allenson surveyed her 50 students in her class on which subjects were their hardest? 23 of her students said that Reading was their hardest subject and 38 of her students said Math was their hardest subject. a. What are the chances that a random student selected in her class said that both Reading and Math were their hardest subjects? b. Compute (P M | R))
Computing Z scores A teacher wanted to know how well the gifted students in here class...
Computing Z scores A teacher wanted to know how well the gifted students in here class perform relative to her other classes. She administers a standardized test with a mean of 50 and standard deviation of 10. Her class of 31 students has an average score of 55, what percent of classes is their average score higher than? 2. A researcher wanted to study the effects of mentoring on intelligence scores. He wanted to know as a baseline what the...
Sick children: There are 21 students in Mrs. Bush's sixth-grade class.
Sick children: There are 21 students in Mrs. Bush's sixth-grade class. On a cold winter day in February, many of the students had runny noses and sore throats. After examining each student, the school nurse constructed the following table. Round the answers to four decimal places, as needed. Sore ThroatNo Sore ThroatRunmy Nose No Runny68Nose25(a) Find the probability that a randomly selected student has a runny nose. (b) Find the probability that a randomly selected student has a sore throat. (c) Find the...
Question 37 Mrs. Jones wanted to compare her students' math scores on two tests, each of...
Question 37 Mrs. Jones wanted to compare her students' math scores on two tests, each of which had 40 items. She found that for Test A, the mean was 20 and the standard deviation was 4, and for Test B, the mean was also 20, but the standard deviation was 6. Which of the following statements is true? a.The distribution of scores for Test B is positively skewed. b.The scores for both tests are normally distributed. c.There is more variation...
5. In a class of 60 students, 13 could not roll their tongue, 17 had attached...
5. In a class of 60 students, 13 could not roll their tongue, 17 had attached earlobes, and 10 could roll their tongues and had attached earlobes. A student is randomly selected from this class. Find the probability that the selected student: a can roll his or her tongue. b could not roll his or her tongue and had attached earlobes. c could either roll his or her tongue or had attached earlobes but not both.
A teachers looks over her class and notices a few trends. Out of the 60 students...
A teachers looks over her class and notices a few trends. Out of the 60 students in the class, 23 have brown hair, seven have green eyes, and three have both brown hair and green eyes. What is the probability that a randomly selected student has either brown hair or green eyes?
A group of students in a research methods class wanted to understand if living situation (alone...
A group of students in a research methods class wanted to understand if living situation (alone or with roommate/s) affects college students’ anxiety levels. They recruited eight PY101 students who were living alone and 8 who had a roommate to take part in their study. (None of the study participants lived together.) To measure anxiety, they gave the Beck Anxiety Inventory to all participants. The scores from the anxiety inventory are listed in the following table. Alone (A) Roommates (B)...
A class of 22 students, 7 are seniors and 15 are juniors. In how many ways...
A class of 22 students, 7 are seniors and 15 are juniors. In how many ways can we choose a group of 6 people if. . . (a) three are to be selected from seniors and three from juniors? (b) at least three are to be selected from juniors? (c) Ashley (one of the 22 students) must be included in the group (with no additional requirements)? (d) 3 of the selected students must be assigned the jobs of writer, presenter,...
2. A young woman is worried about having a child because her mother's only sister had...
2. A young woman is worried about having a child because her mother's only sister had a son with Duchenne muscular dystrophy (DMD). The young woman has no brothers or sisters. (DMD is a rare X-linked recessive disorder.) (a) Draw the relevant parts of the pedigree of the family described above. (Be sure to include the grandmother, the three women mentioned, and all their mates). (b) State the most likely genotype of everyone in the pedigree. (c) Calculate the probability...
A psychologist wanted to know if students in her class were more likely to cheat if...
A psychologist wanted to know if students in her class were more likely to cheat if they were low achievers. She divided her 60 students into three groups (low, middle, and high) based on their mean exam score on the previous three tests. She then asked them to rate how likely they were to cheat on an exam if the opportunity presented itself with very limited chance for consequences. The students rated their desire to cheat on a scale ranging...
5. In a class of 60 students, 13 could not roll their tongue, 17 had attached earlobes, and 10 could roll their tongues and had attached earlobes. A student is randomly selected from this class. Find the probability that the selected student: a can roll his or her tongue. b could not roll his or her tongue and had attached earlobes. c could either roll his or her tongue or had attached earlobes but not both.
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