4. The grades of a group of 1000 students in an exam are normally distributed with a mean of 70 and a standard deviation of 10. A student from this group is selected randomly. a) Find the probability that his/her grade is greater than 80. b) Find the probability that his/her grade is less than 50. c) Find the probability that his/her grade is between 50 and 80. d) Approximately, how many students have grades greater than 80?

Q: The probabilities of a machine manufacturing 0, 1, 2, 3, 4, or 5 defective parts in one day are 0.75...

A:

Q: hmed wants to buy one of three different books he sees in a book store. Each is available in print a...

A: Given: He has two categories to select (1) CD (2) BOOK And each category has 3 things to select Now ...

Q: The number of stork sightings on a route in South Carolina per year follows a Poisson distribution w...

A:

Q: . An urn A contains 2 white and 4 black balls. Another urn B contains 5 white and 7 black balls. A b...

A: Here One ball is selected from urn A and transfer to B So if selected ball from A is white then no o...

Q: a) What is the probability of selecting students whose IQ ranges between 110 and 127? b) If you will...

A: The IQs of 100 students are normally distributed with a mean of 115 and a standard. deviation of 10....

Q: If the joint probability density function of two continuous random variables X and Y is given by f (...

A:

Q: Find the corresponding area between z = 0 and each of the following: (Your answer must be in percent...

A:

Q: Suppose the time spent by a randomly selected student who uses a terminal connected to a local time-...

A: Given that :  Suppose the time spent by a randomly selected student who uses a terminal connected to...

Q: The following table shows the typical depth (rounded to the nearest foot) for nonfailed wells in geo...

A:

Q: Read, analyze, and solve the given problems. Write your solutions and answers on the space provided ...

A: As per bartleby guideline expert have to answer first question only since I had done all for you ple...

Q: How many distinguishable permutation can be made from the letters of the word MATH? Ɔ 12 ) 18 O 20 O...

A:

Q: Question 2: From the experience of tossing two dice together, what is the probability that two numbe...

A: Solution

Q: What I Can Do In a school canteen, the number of ball pens (X) sold every recess time varies from da...

A: Given that  x P(X=x) 0 0.029 1 0 049 2 0.078 3 0.155 4 0.212 5 0.262 6 0.215 Not...

Q: 4) a. A few mechanics on a Toyota showroom identified that they attend an average of (B + A) cars pe...

A:

Q: e residents of a city rank the six cell phone companies in their area. What is the probability that ...

A: The residents of a city rank the six cell phone companies in their area. P(Correct order)=?  

Q: 6. A bag contains 6 red and 3 white balls. Four balls are drawn out one by one and not replaced. Wha...

A:

Q: You are given the following excerpt from a life table, including mortality rates and expected value ...

A: Given the excerpt from a life table, including mortality rates and expected of a 1 unit whole life i...

Q: The probability that a patient will be cured of corona virus when injected with the new vaccine is 0...

A:

Q: (a) Find each of the following probabilities. (Round your answers to four decimal places.) P(A) = P(...

A:

Q: The weight of people in a small town in Missouri is known to be normally distributed with a mean of ...

A: Solution: Let X be the weight of people in a small town in Missouri is known to be normally distribu...

Q: 1. In a radioactivity counting measurement, a total count of 1,000 was recorded in 100m Assuming tha...

A:

Q: Can you use a tree diagram and show every step please! If Mary is late for school one particular da...

A: Given Data: P( late the next day | on time the previous day)=0.3 P( late the next day | late the pre...

Q: Question 1. A researcher wants to study the effect of a price change on the sales of various brands ...

A:

Q: A genetic disease occurs in about 1 of every 7000 non-Caucasian births and about 1 of every 200,000 ...

A: Given 7000 non caucasian birth 290000 caucasian birth

Q: Central Limit Theorem for Sums Suppose random samples of n = 42 are collected from an unknown distri...

A:

Q: Suppose that a country has the following female age structure in the year 2005: Half the women die a...

A: Given the age structure of females in 2005 as shown below At age 20 each women has one daughter. Thu...

Q: If the warehouse receives 450,000 labels from supplier, using the square root method, at least how m...

A: Given that the warehouse receives 450,000 labels from supplier.

Q: Find the probability that the circuit operates. 2. It is known that the circuit is operating, find t...

A:

Q: Given the probability distribution of the random variable X below, compute for the variance and stan...

A: Given :

Q: Given the following information about events A, B, and C, determine which pairs of events, if any, a...

A: given,P(A)=0.58,  P(A|B)=0 P(B)=0.32,  P(C|B)=0.63 P(C)=0.63,     P(A|C)=0.58

Q: 22. The Radical/Root Theorem of the limit states that a. If n is a negative integer, the limit of th...

A:

Q: What is the probability of getting exactly two Heads in a single throw of three coins?

A: given experiment: a single throw of three coins.now, sample space S={HHH,HHT,HTH,THH,TTH,THT,HTT,TTT...

Q: In a job fair, 3000 applicants applied for a job. Their mean age was formed to be 28 with a standard...

A: We have given that Mean(µ) = Standard deviations (σ) = 1 N = 3000  

Q: A multiple choice test contains 25 questions, each with 4 answers. Assume a student just guesses on ...

A: Given that  Number of questions (n) = 25 Each question has 4 answer and one is correct answer  P(Cor...

Q: Solve for P(X=130 | Y=15)

A: Plastic covers for CDs. Measurements for the length and width of a rectangular plastic covers for CD...

Q: 4 A fair die is rolled. Let Y be the face value show ing, 1, 2, 3, 4,5, or 6 with each having the pr...

A: Given that a fair die is rolled. Let Y be the face value showing 1,2,3,4,5,6 with each having probab...

Q: 24 The worker at Factory A who made $180 per day received a raise and now makes $195 per day. If thi...

A:

Q: Researchers wanted to study if wearing cotton clothes is related to depression. They surveyed a larg...

A: Given data                    Depressed     Not depressed     Total Cotton              A= 122      ...

Q: a certain frequently traded stock is only priced up to round d idered), and you place a BUY trade fo...

A: *Answer: 

Q: ENTRY CARD Compute the variance of this frequency distribution. Score Number of Students 3 8 10 4. 1...

A: For the given data Find Mean =? Variance =?

Q: . An urn A contains 2 white and 4 black balls. Another urn B contains 5 white and 7 black balls. A b...

A: Let us define some events A : a white ball is transfered. B : a black ball is transfered. E : a whit...

Q: A person rolls a regular 6-sided die twice and the result of the experiment is the sum of the number...

A: A person rolls a regular 6-sided die twice and the result of the experiment is the sum of the number...

Q: 6. The University of Montana ski team has 15 entrants in a men's downhill ski event. The coach would...

A: 6) The number of entrants in men’s downhill ski event is 15.

Q: The lengths of adult males' hands are normally distributed with mean 188 mm and standard deviation i...

A:

Q: What is the probability of getting exactly two Heads in a single throw of three coins?

A:

Q: View Policies Current Attempt in Progress For the following exercise, determine the range (possible ...

A:

Q: coffee shop offers 10 different types of flavor shots. If customer can choose any number of flavor s...

A:

Q: A study shows in a certain school that the average number of hours a student answers his/her module ...

A:

Q: A special plate number is made up of 2 letters of the vowel followed by 3 digit numbers. How many pl...

A:

Q: 3 Find P (A/B) and P (BIA), show. 4 3 Given P(A) = , P(B) 8 and P(B A) 8 %3D whether A and B are ind...

A: