The downtime per day for a certain computing facility averages 4 hours with a standard deviation of 0.8 hours. Which z-score would you use in order to find the probability that the total downtime for 35 days is less than 138,13 hours. Round the answer to two decimal places.

Q: A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. ...

A: From the provided information,  

Q: An electrical firm manufactures light bulbs that have a length life with normal distribution, and me...

A: Since the population of the life time of the light bulbs being sampled from following a normal distr...

Q: A large consumer goods company ran a television advertisement for one of its soap products. On the b...

A: Given data:     The individual probability purchase the product is: P(B)=0.20. The probability indiv...

Q: A process that fills packages is stopped whenever 7 packages are detected whose weight falls outside...

A: Let X is the number of packages that will be filled before the process is stopped. Here, X follows a...

Q: A random sample of 20 acres gave a mean yield of wheat equal to 41.5 bushels per acre with a standar...

A: Givensample size n = 20mean = 41.5standard deviation = 3 Degree of freedom = n - 1 = 20 -1 = 19 The ...

Q: Compute the value of F statistic value of between groups using the following ANOVA table: Source of ...

A: Introduction: Consider k groups are to be compared with respect to their means, when it is known tha...

Q: AT&T was running commercials in 1990 aimed at luring back customers whohad switched to one of th...

A: Let us define an event E such that the call is misdirected. Probability that the event E occurs is g...

Q: The average daily points for my fantasy baseball team are {4.1, 5.7, 3.8, 4.7, 4.7, 5.5, 4.1, 2.7, 5...

A: Note: Hi there! Thank you for posting the question. As there are multiple sub parts, according to ou...

Q: A population of values has a normal distribution with μ=155.9μ=155.9 and σ=50.3σ=50.3. You intend to...

A: Here X follows normal distribution with µ= 155.9, σ= 50.3. Thus, X~N(155.9,50.3). The required proba...

Q: The high price of medicines is a source of major expense for those seniors in the United States who ...

A: It is given that:

Q: The percentage of adult users of the Internet who use Facebook has increased over time (Pew Research...

A:

Q: For time series data on sales (v) and advertisement cost (x) the fitted trend equation is y = -43.80...

A: Residual: Residual states that it is a vertical distance between the data and line of regression. Th...

Q: In tossing a fair coin and rolling a fair die, how many elements are there in the following events: ...

A: The sample space of an experiment is the set of all possible outcomes of that experiment. It is deno...

Q: please answer all parts

A: Consider, Population mean (µ) = 700 Population standard deviation (σ) = 25 Sample mean (x̅) = 650 Sa...

Q: At a Noodle & Company Restaurant the probability that a customer orders a nonalcoholic beverage ...

A:

Q: Recall from Example 1 that whenever Suzan sees a bag of marbles, she grabs a handful at random. She ...

A:

Q: A salesperson goes door-to-door in a residential area to demonstrate the useof a new household appli...

A: Given information n = 18, p = 0.2107 X ~Bin (n = 18, p = 0.2107)

Q: For testing the hypothesis H,:o =5 versus H1:0 >5. Suppose the degrees of freedom is 9. Then, the fi...

A:

Q: 55. (A) If 120 scores are chosen from a normal distribution with mean 75 and standard deviation 8, h...

A: Given: Formula used:  

Q: Suppose the sample mean is 5.0 and with 95% confidence, the margin of error is 2.5. Then, the confid...

A: Given:

Q: The following table gives numbers of claims at a large insurance company by kind and by geographic r...

A: Note: Thank you for the question. Since multiple sub parts are posted, according to our policy, we a...

Q: A media personality argues that global temperatures are not rising, because every year an increase i...

A: Given that the difference between the temperatures of two consecutive years is 0.08  That means the ...

Q: Mr Okyere takes banana and apple to the office to share with his officemate. The probability that he...

A: Let event A be the Mr Okyere eat the banana and event B be the Mr Okyere eat the apple. That is , P(...

Q: .Jamal Crawford of the National Basketball Association’s Portland Trail Blazers is thebest free-thro...

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have ...

Q: A game-show spinner has these odds of stopping on particular dollar values: 40% for $50, 25% for $10...

A: From the provided information, The odds of a player winning $50 = 40% The odds of a player winning $...

Q: Find the value of t for the t distribution with a sample size of 30 and area in the right tail equal...

A: Given, n=30 df=n-1=29 alpha=0.025 The t critical value for  sample size of 30 and area in the right ...

Q: If 120 scores are chosen from a normal distribution with mean 75 and standard deviation 8, how many ...

A: Given Information Mean (µ) = 75 Standard deviation (σ) = 8 Finding the probability for scores that w...

Q: The average return for large­cap domestic stock funds over the three years 2009–2011was 14.4% (aaii ...

A: Let use denote: X=return for large­cap domestic stock funds over the three years 2009–2011 Given tha...

Q: Is the null hypothesis more or less likely to be rejected? Explain. | for degrees of freedom less th...

A:

Q: Broadway Carpets sells designer rugs at retail for $870.82. If a 57% markup based on cost is added, ...

A: The formula for cost is obtained as, C = SP/(100% + %Mcost). Here, SP denotes the selling price and ...

Q: A coordinator will select 5 songs from a list of 14 songs to compose an event's musical entertainmen...

A:

Q: A bag of marbles has 5 blue marbles, 7 green marbles, 11 red marbles, and 2yellow marbles. a. What i...

A: (a). Find the probability of drawing a green marble: The number of blue marbles is n(B) = 5, The num...

Q: Recall from Example 1 that whenever Suzan sees a bag of marbles, she grabs a handful at random. She ...

A: There are total (4+4+5+1)=14 marbles. She can pick any 8 marbles from 14 marbles in 14C8 ways If she...

Q: Callahan (2009) demonstrated that tai chi can signifi- cantly reduce symptoms for individuals with a...

A: (1) State the hypotheses. That is, there is no evidence to conclude that tai chi had a significant ...

Q: Suppose in 3 consecutive days an instant  winner lottery tickets is purchased and the probability of...

A:

Q: A city planner wants to estimate the average monthly residential water usage in the city. He selecte...

A: The sample mean is 3410.30 gallons. Population standard deviation, σ is 387.60 gallons. The sample s...

Q: A random sample of   n = 16 mid-sized cars tested for fuel consumption gave a mean of   x ¯ = 21.69 ...

A:

Q: (b) The Ministry of Agriculture in its fight against the army worm infection of maize farms in the c...

A: They can combine A, B, C in three ways. (A,B) , (B,C), (A,C) So the total probability that they pick...

Q: Experience has shown that the weight of oranges produced by an orchard inTzaneen is normally distrib...

A: Consider, Population mean (µ) = 120 Population standard deviation (σ) = 20 Sample size (n) = 115 Con...

Q: A pet store has 8 ​puppies, including 2 ​poodles, 4 ​terriers, and 2 retrievers. If Rebecka and​ Aar...

A: There are 8 puppies, including 2 poodles, 4 terriers, and 2 retrievers. Since Rebecka selects a pood...

Q: A real estate agent has four houses to sell before the end of the month by contacting prospective  c...

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have ...

Q: For a population data set, σ = 13.0 . How large a sample should be selected so that the margin of er...

A: Given, As per z-distribution table, the zcrit value for 96% confidence level is obtained as 2.05.

Q: The Ministry of Agriculture in its fight against the army worm infection of maizefarms in the countr...

A: Given there are three brands of chemicals A, B and C such that Proportion of farmers who used chemic...

Q: A biologist found the wingspans of a group of monary butterflies to be normally distributed with a m...

A:

Q: Pick a card, any card. Suppose you pick the 5 of Hearts. If the 5 of Hearts is not returned to the d...

A: Given information 5 of hearts is picked from a standard deck of cards and 5 of Hearts is not returne...

Q: Suppose Edward did not do the webwork problem about students randomly guessing on multiple choice ex...

A: Given, number of multiple-choice questions n=100 Each multiple-choice question consists of 4 options...

Q: You order twelve burritos to go from a Mexican restaurant, nine with hot peppers and three without. ...

A: Given, Total burritos=12 No. of Burritos with hot pepper=9 No. of Burritos without hot pepper =3 The...

Q: A mainframe computer in a university crashes on the average 0.71 time in a semester. What is the pr...

A: As we know that the probability of crashing a mainframe computer in a university is very very low. S...