b) A research study shows that the lifetime of the computers at a certain university is exponentially distributed with an average of 4 years. i) A lab acquires 10 university computers. What is the probability that exactly half of them are still functioning after 6 years? (Hint: the probability of x successes after n trials...what is p?)

Q: 2005, 0.74 proportion of all airline flights were on-time. If we choose a simple random sample of…

A: We have given that  Success  of probability  p= 0.74   Number of  trials  n=2000

Q: A game consists of the following. First, a coin is flipped. If the coin lands heads, a random real…

A: Given information: It is given that, if the coin lands heads, a random real number is drawn from the…

Q: For the upcoming school fair, each ride requires from 0 to 3 tickets to ride. The probability…

A: 8.

Q: A survey showed that 84% of adults need correction (eyeglasses, contacts, surgery, etc.) for their…

A: Let there are n trials and each having two outcomes - Success and Failure. The trials are…

Q: 4.3 A survey of 500 adults found that 40% of them prefer coffee over tea. If a random sample of 20…

A: Let X be the number of adults who prefer coffee over tea. The probability of adults who prefer…

Q: 25% of a certain breed of rabbits are born with long hair. What is the probability that in a litter…

A: Obtain the probability that in a litter of 8 rabbits exactly 5 will have long hair. The probability…

Q: In 1970, 90% of 30-year-olds in a country earned more than their parents did at age 30 (adjusted for…

A: Given,P(in 1970 , 30 years old in a country earned more than their parents)=0.90P(in 2014 , 30 years…

Q: Social​ log-ins involve recommending or sharing an article that you read online. According to a​…

A: From the provided information, 39% signed in via Site A and 47% for Site B. The process should…

Q: In an election, 16 percent of the people voting at a precinct vote against Proposition A. If voters…

A: Geometric distribution: The probability mass function of Geometric distribution is P(n) = p(1 - p)n…

Q: Twenty-five percent of the employees of a large company are minorities. A random sample of 7…

A: Given data, 25% of employees are minorities =0.25 Let p be the proportion that employees are…

Q: P-Value approoach. 9) Smith is a weld inspector at a shipyard. He knows from keeping track of good…

A:

Q: A recent survey of 2500 college students revealed that during any weekend afternoon, 1112 receive a…

A:

Q: At a new exhibit in the Museum of Science, people are asked to choose between 90 or 120 random draws…

A: a) Total number of balls =158=93+65. Number of green balls=93 Pgreen balls=Number of green…

Q: 10. You are studying a mutant mouse that you suspect will exhibit a longer lifespan than wild-type…

A: here given ,  10. You are studying a mutant mouse that you suspect will exhibit a longer lifespan…

Q: What must be the probability that a child has not seen a dentist in more than 5 years? What is the…

A: Given probability for child has not seen dentist for particular days. 6 months or less (p1=0.57) 6…

Q: Question 8: Independent trials, each resulting in a success with probability p or a failure with…

A: Let E be the event that a run of n consecutive successes occurs before m consecutive failures.…

Q: Show all work

A: Finally, we can say that :…

Q: Question 8: A production line produces 6% defectives. For a random sample of 10 components,…

A: given data  P(defective) = p = 0.06 n = 10 components selected x = no. of defective components…

Q: Example 8 : It has been found that 2% of the tools produced by a certain machine are defective. What…

A:

Q: According to Masterfoods, the company that manufactures M&M's, 12% of peanut M&M's are brown, 15%…

A: Given information P (Brown peanut) = 0.12 P (Yellow peanut) = 0.15 P (Red Peanut) = 0.12 P(Blue…

Q: The teachers at a local high school were surveyed. Two of the variables recorded for the 150…

A: P(less than 5 Y teaching experience) = P(new teacher)

Q: Suppose that on the average a certain type of magnetic tape contains on the average three defects…

A: Given on average 3 defects per 1000 feetfor 1 feet=31000=0.003 defects For 1200 feet the defects is…

Q: A survey of 2.350 adults reported that 54% watch news videos Complete parts (a) through (c) below B.…

A: proportion=0.54sample proportion=0.5a) sample size=50b) sample size=250