Answer all of the questions in order. Show all of your work. No credit will be...
Answer all of the questions in order. Show all of your work. No credit will be given for correct answers with no work shown. Partial credit will be awarded where possible. Good luck.
- A teacher has taken attendance of her class of five students for the entire semester and found the number of days with each level of attendance. Her records show the following:
# of Students attending class: 1 2 3 4 5
Days in the semester with this attendance level (out of 30 days): 4 2 10 4 10
a) What’s the probability of there being 3 or more students on any random day?
b) What is the expected number of students to attend a randomly selected day?
- On average, 30% of textile shipments from ABC Shipping Company are late.
a) What is the probability that less than three of the next 4 shipments will be late?
b) What is the probability that exactly 4 of the next 10 shipments will be late?
- The average rate of “set waves”, larger waves which come in a small group and are preferred by surfers, is 8 per 20 min.
a) What is the standard deviation of the number of waves per 20 min?
b) What is the probability of there being 18 waves in an hour?
- The height of maple trees are distributed normally with a mean of 31 meters and a standard deviation of 4 meters.
a) What is the probability of a tree being taller than 33 meters? Represent this graphically as well as numerically.
b) A group of 20 trees is selected at random. What is the probability that the average height of these 20 trees is more than 33 meters? Represent this graphically as well as numerically.
c) A group of 20 trees is selected at random. What is the probability that the average height of these trees is between 30 and 32 meters? Represent this graphically as well as numerically.
- A pitcher pitches a strike ( a good pitch) an average of 75% of the time. What is the probability that in a given game, at least 77 pitches of 110 thrown were strikes? Represent this graphically as well as numerically.
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Answer all of the questions in order. Show all of your
work. No credit will be...
conducted to determine success rates of students enrolled in the Statistics courses offered at South Plains College for the fall semester of 2015. A random sample of 14 students was taken, and...
conducted to determine success rates of students enrolled in the Statistics courses offered at South Plains College for the fall semester of 2015. A random sample of 14 students was taken, and we recorded each student's age, final average, gender, # hours worked per week, race, and t attended this semester). Use the results from the following table to answer all parts of #2. he attendance record (# of classes not Age 20 18 19 Final Average Gender # Hrs...
A study was conducted to determine success rates of students enrolled in the Statistics courses o...
A study was conducted to determine success rates of students
enrolled in the Statistics courses offered at South Plains College
for the fall semester of 2015. A random sample of 14 students was
taken, and we recorded each
student’s age, final average, gender, # hours worked per week,
race, and the attendance record (# of classes not attended this
semester). Use the results from the following table to answer all
parts of #2
f. For the age variable, construct 3...
Question* On STAT your assessment is based on: Final Exam Learn based online assessment Assignments 4790 +' 3490 19% Consider three random variables X, Y and Z which respectively represent the ex...
Question* On STAT your assessment is based on: Final Exam Learn based online assessment Assignments 4790 +' 3490 19% Consider three random variables X, Y and Z which respectively represent the exam, online assessment total and assignment scores (out of 100%) of a randomly chosen student. Assume that X, Y and Z are independent (this is clearly not true, but the answers may be a reasonableapproximation).Suppose that past experience suggests the following properties of these assessment items (each out of...
. A study was conducted to determine success rates of students enrolled in the Statistics courses...
. A study was conducted to determine success rates of students enrolled in the Statistics courses offered at South Plains College for the fall semester of 2015. A random sample of 14 students was taken, and we recorded each student’s age, final average, gender, # hours worked per week, race, and the attendance record (# of classes not attended this semester). Use the results from the following table to answer all parts of #2. Age Final Average Gender # Hrs...
Of students at a particular university: 20% are freshmen 22% are sophomores 23% are juniors 28%...
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Please explain and show all work 3· Le t x represent the number of credit cards...
Please explain and show all work
3· Le t x represent the number of credit cards a student has. A random sample of 100 students at a large university was taken and the results are in the table below: Credit NumberRelative xStudentsPr) 12 P(x) Cards of Frequencyx .P(x) 45 25 10 TOTAL 100 1.00 a) Construct a probability distribution histogram and comment on its shape b) What is the probability a randomly selected student has at least two credit cards?...
Please do 39 A and C. Show all work please! 39) A random sample of 300...
Please do 39 A and C. Show all work please! 39) A random sample of 300 Mt. SAC students majoring in math or psychology is selected. These students were asked whether they are happy with their majors. The results are summarized in the following table: Happy . Unhappy Math 100 20 Psychology . 10 170 a) When one student is selected randomly from this group, find the probability this student is happy with the choice of major given that the...
On stat your assessment is based on: Final Exam 47% Learn based on‐line assessment 34% Assignments...
On stat your assessment is based on: Final Exam 47% Learn based on‐line assessment 34% Assignments 19% Consider three random variables X, Y and Z which respectively represent the exam, on‐line assessment total and assignment scores (out of 100%) of a randomly chosen student. Assume that X, Y and Z areindependent (this is clearly not true, but the answers may be a reasonable approximation). Suppose that past experience suggests the following properties of these assessment items (each out of 100%):...
in 214 Section Hicach domow page in your blue bok Only wor k will be add must show your work where every to reveu T...
in 214 Section Hicach domow page in your blue bok Only wor k will be add must show your work where every to reveu This includes Functions that you may use in your calculo You MUST give the name of the union, AND the param o input into each function 1. Find the following areas under the standard normal curve. Round answers to four decimal a) the area to the left of 2-0.64. h) the area to the right of...
Use the given information below to answer the questions. Show ALL your work. The heights of...
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conducted to determine success rates of students enrolled in the Statistics courses offered at South Plains College for the fall semester of 2015. A random sample of 14 students was taken, and we recorded each student's age, final average, gender, # hours worked per week, race, and t attended this semester). Use the results from the following table to answer all parts of #2. he attendance record (# of classes not Age 20 18 19 Final Average Gender # Hrs...
A study was conducted to determine success rates of students
enrolled in the Statistics courses offered at South Plains College
for the fall semester of 2015. A random sample of 14 students was
taken, and we recorded each
student’s age, final average, gender, # hours worked per week,
race, and the attendance record (# of classes not attended this
semester). Use the results from the following table to answer all
parts of #2
f. For the age variable, construct 3...
Question* On STAT your assessment is based on: Final Exam Learn based online assessment Assignments 4790 +' 3490 19% Consider three random variables X, Y and Z which respectively represent the exam, online assessment total and assignment scores (out of 100%) of a randomly chosen student. Assume that X, Y and Z are independent (this is clearly not true, but the answers may be a reasonableapproximation).Suppose that past experience suggests the following properties of these assessment items (each out of...
Please explain and show all work
3· Le t x represent the number of credit cards a student has. A random sample of 100 students at a large university was taken and the results are in the table below: Credit NumberRelative xStudentsPr) 12 P(x) Cards of Frequencyx .P(x) 45 25 10 TOTAL 100 1.00 a) Construct a probability distribution histogram and comment on its shape b) What is the probability a randomly selected student has at least two credit cards?...
in 214 Section Hicach domow page in your blue bok Only wor k will be add must show your work where every to reveu This includes Functions that you may use in your calculo You MUST give the name of the union, AND the param o input into each function 1. Find the following areas under the standard normal curve. Round answers to four decimal a) the area to the left of 2-0.64. h) the area to the right of...
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