A multiple-choice examination consists of  85  questions, each having possible choices a, b, c, and d. Approximate the probability that a student will get fewer than  18  answers correct if he randomly guesses at each answer. (Note that, if he randomly guesses at each answer, then the probability that he gets any one answer correct is  0.25 .) Use the normal approximation to the binomial with a correction for continuity. Round your answer to at least three decimal places. Do not round any intermediate steps. (If necessary, consult a list of formulas.)

Q: Suppose that for a certain brand of battery, the life in months is exponentially distributed with a…

A: Given: X~Expmm=177

Q: The data represent the results for a test for a certain disease. Assume one individual from the…

A:

Q: A certain disease has an incidence rate of 0.1%. If the false negative rate is 6% and the false…

A: Given data,P(Disease)=0.1%=0.001P(No…

Q: The mean of the time it takes for a product to arrive from China is 50 days and the standard…

A:

Q: Instructions for questions 1-3: Sketch the distribution and shade the area corresponding to the…

A: Given information probability value=p=10%, n=100

Q: The data represent the results for a test for a certain disease. Assume one individual from the…

A:

Q: begins to pass that point. What is the probability that headway time is at most 5seconds given the…

A:

Q: The data represent the results for a test for a certain disease. Assume one individual from the…

A: Here the given table is :- YesNoTotalPositive 13326159Negative 7134141Total140160300Using formula,

Q: An insurance company is studying the driving records of teenagers. The number of moving violations…

A: Solution: Let X be the number of violations. From the given information, the frequency data is

Q: In a batch of 2170 boxes of cereal, there are, on average, 12 with prizes. If a random sample of 170…

A: Given: Total number of boxes of cereal = 2170 On average prizes = 12 Probability of success p =…

Q: Based on results from recent track meets, Leon has a 64% chance of getting a medal in the 100 meter…

A: Given information: Leon has a 64% chance of getting a medal in the 100 meter dash. Here, we need to…

Q: When doing blood testing for a viral infection, the procedure can be made more efficient and less…

A: Given information- We have given the probability of an individual blood sample testing positive for…

Q: 4. The probability that Vittorio will wait at least 10 minutes less than Ugo.

A:

Q: 1f. It has been reported that the first week in May NC has an average daily temperature of 88…

A: Average daily temperature of first week in May is 88 degrees. The first week had recorded…

Q: Find the variance of a binomial distribution when p = 73% and n = 205. (

A: Note :- Variance=np(1-p) in our question Given that p=73%=.73 And n=205 So

Q: a. What is the distribution of X?X - ? ✓ Please show the following answers to 4 decimal places. b.…

A: As per policy I have calculated 3 subparts kindly REPOST for remaining parts with note I need this…

Q: d. The probability that the wave will crash onto the beach between 1.5 and 1.8 seconds after the…

A:

Q: The data represent the results for a test for a certain disease. Assume one individual from the…

A: Given:…

Q: The data represent the results for a test for a certain disease. Assume one individual from the…

A: The given summarized table is, The probability of he or she had the disease is,

Q: Problem 6- 54.4: Finst Down! The following table shows the prohability P, as a percentag, of a…

A: Given Data : X = D (distance in yards)  Y = Probability (%) 1 70 2 60 3 53 4 46 5 41…

Q: he variance of the event of a coin being thrown four times equal to the center of gravity is the…

A:

Q: For each probability and percentile problem, draw the picture. Suppose that the useful life of a…

A: Solution

Q: he lQ scores of a large group of students are approximately normally distributed. What is the…

A: Given Normal Distribution

Q: Suppose that a company gains an average of 5 customers per $500 spent on advertising. If the company…

A: Given that the company gains an average of 5 customers per $500 spent on advertising. That is, the…

Q: Consider a population of 8 students. Suppose we know the test scores of the students to be 3 4 5 6 7…

A: Given : To find : Mean and variance of the popl.

Q: A raffle has a grand prize of a Alaskan cruise valued at $15000 with a second prize of a weekend in…

A:

Q: Examine the image below and then answer all parts of the question under it. Enter your answers as…

A: a) There are 4 yellow objects in 10 objects.So, P(yellow)=410=0.4b) There are 3 hearts in the 10…

Q: The data represent the results for a test for a certain disease. Assume one individual from the…

A: The individual actually had the disease   Yes No Positive 122 33 Negative 8 137

Q: The variability of the scores in a sample tends to be _____ the variability of the scores in the…

A: As, we know that larger the size of population,  larger the variability in the population,  if we…

Q: Among the most common sources of random variation is: Оа. реоple O b. materials O c. equipment d.…

A: random variation represents the sum of many small variations, arising from real but small sauses…

Q: Assuming that a family has two children, identify the expected number of boys per family. 1 A B 2 1

A:

Q: 2. The probability that both will catch the bus within 15 minutes, given they are still waiting…

A:

Q: The data represent the results for a test for a certain disease. Assume one individual from the…

A: Given Total number of tasted person=290

Q: The actual time taken by an auto service shop to change the oil in a pickup truck is exponentially…

A: Solution

Q: The proportion of eligible voters who will vote for Shaun Spicer in the next Presidential election…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.