When people buy a certain type of laptop, there are three most popular upgrading options: upgrade the RAM (A), upgrade the hard drive (B), upgrade the graphic card (C). If 50% of all purchasers request A, 40% request B, 36% request C, 66% request A or B, 76% request A or C, 66% request B or C, and 86% request A or B or C, determine the probabilities of the following events.

(1) One randomly selected purchaser will request at least one of the three options.

(2) One randomly selected purchaser will select none of the three options.

(3) One randomly selected purchaser will request only option C and not neither of the other two options.

(4) One randomly selected purchaser will request exactly one of the three options.

9) The site of the bacterial cell where ATP is produced is the:

a)   plasma membrane

b)   cell wall

c)   flagella

d)   nuclear region

e)   cytoplasm

44) Which of the following is regulated by an operator:

a) DNA sythesis

b) protein synthesis

c) RNA synthesis

d) b and c

e) all of the above

44) Which of the following is regulated by an operator:

a) DNA sythesis

b) protein synthesis

c) RNA synthesis

d) b and c

e) all of the above

56) Single amino acids are found on:

a) DNA

b) mRNA

c) tRNA

d) rRNA

e) Proteins

77) If a solution of 1x107 bacteria/milliliter were diluted one million times and then one tenth of a milliliter of that dilution was added to a Petri dish, how many bacterial colonies would you find after incubation for one or two days:

a) 1

b) 10

c) 100

d) 1,000

e) 10,000

78) If a solution of 1x105 bacteria/milliliter were diluted ten thousand times and then one tenth of a milliliter of that dilution was added to a Petri dish, how many bacterial colonies would you find after incubation for one or two days:

a) 1

b) 10

c) 100

d) 1,000

e) 10,000

A source transmitted a message through a noisy channel. Each symbol is 0 or 1 with probability p and 1 − p, respectively and is received incorrectly with probability 0 and 1. Errors in different symbol transmission are independent.

(a) What is the probability that the kth symbol is received correctly?

(b) What is the probability that the string of symbols 0111 is received correctly?

(c) To improve reliability, each symbol is transmitted three times and the received string is decoded by majority rule. For example, a 0 is transmitted as 000 and is decoded at the receiver as a 0 if and only if the received three symbol string contains at least two 0s. Similar rule applies to 1. What is the probability that a 0 is corrected decoded?

To what extent do syntax textbooks, which analyze the structure of sentences, illustrate gender bias? A study of this question sampled sentences from 10 texts. One part of the study examined the use of the words "girl," "boy," "man," and "woman." We will call the first two words juvenile and the last two adult. Is the proportion of female references that are juvenile (girl) equal to the proportion of male references that are juvenile (boy)? Here are data from one of the texts:

(a) Find the proportion of juvenile references for females and its standard error. Do the same for the males. (Round your answers to three decimal places.)

Answers:

(b) Give a 90% confidence interval for the difference. (Do not use rounded values. Round your final answers to three decimal places.)

( ______ , _____ ) Answers

(c) Use a test of significance to examine whether the two proportions are equal. (Use p̂_F − p̂_M. Round your value for z to two decimal places and round your P-value to four decimal places.)

Answers :

State your conclusion.

___There is not sufficient evidence to conclude that the two proportions are different.

___There is sufficient evidence to conclude that the two proportions are different.    

THANK YOU :)

6. Kurt Simmons has 50/100/15 auto insurance coverage. One evening he lost control of his vehicle hitting a parked car and damaging a store front along the street. Damage to the parked car was $6,400 and damage to the store was $10,650. What amount will the insurance company pay for damages? What amount will Kurt have to pay?

Cain Components manufactures and distributes various plumbing products used in homes and other buildings. Over time, the production staff has noticed that products they considered easy to make were difficult to sell at margins considered reasonable, while products that seemed to take a lot of staff time were selling well despite recent price increases. A summer intern has suggested that the cost system might be providing misleading information.

The controller decided that a good summer project for the intern would be to develop, in one self-contained area of the plant, an alternative cost system with which to compare the current system. The intern identified the following cost pools and, after discussion with some plant personnel, appropriate cost drivers for each pool. There were:

In this particular area, Cain produces two of its many products: Standard and Deluxe. The following are data for production for the latest full year of operations.

The intern decides to look more closely at the manufacturing activity and determines that it can be broken down into two activities: production and engineering. Production covers the costs of ongoing manufacturing while engineering includes those activities dealing with engineering changes, design modifications, and so on.

The costs attributed to production are $5,412,000 and the costs attributed to engineering are $9,075,000. After discussion with plant engineers, the intern decides that the best cost driver for engineering is setups, because most of the work arises from changes in the way the product is run.

Required:

a-1. Compute the totals of the cost driver rates shown below.(Round intermediate calculations and "Manufacturing" answer to 2 decimal places.)

a-2. What unit product costs will be reported for the two products if the revised ABC system is used?(Round "Unit cost" answers to 2 decimal places.)

Determine which of the following sets of data satisfy the first law of thermodynamics? (Recall that E = total energy = U + KE + PE)

a. W = 50 kJ Q = 170 kJ DeltaE = 120 kJ

b. W = 100 Btu Q = -110 Btu DeltaE = -210 Btu

c. W = 250 kJ Q = -110 kJ DeltaE = -100 Wh

d. W = 44 kPa-m3   Q = -84 kPa-m3 DelatE = 40 kN-m

Consider the following work breakdown structure: What is the probability of finishing the project at exactly 201 days?

Olympic Sports has two issues of debt outstanding. One is a 7% coupon bond wit ha face value of $26 million, a maturity on 15 years, and a yield of 8%. The coupons are paid annually. The other bond issue has a maturity of 20 years, with coupons also paid annually, and a coupon rate of 8%. The face value of the issue is $31 million, and the issue sells for 95% of par value. The firms tax rate is 35%.

A). What is the before-tax cost of debt for Olympic?

B). What is Olympic's after-tax cost of debt?

(For all the requirements, do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.)

7.Are the following scenarios one-tail or two-tail tests? Explain why for each. a) If I don’t have enough money to pay the bill I’m going to look like a jerk on my big date. b) I’m handing out beer coupons and will get arrested if I give one to a minor. c) I’m distributing fliers for a new teen-oriented business in town and I don’t want to waste them on members of the wrong demographic. d) You’re placing a food order for your upcoming party and the food will be spoiled by the day after the party if it’s left over.8.Using the situations above, give the critical z-table value for each when paired with the following confidence intervals. a) 90%. b) 95%. c) 80%. d) 99%.