Ask Engineering Mathematics Expert

Comment on whether each of the following conditions for correlation / linear regression is met.

Quantitative variable condition.
Linearity condition.
Outlier condition.

Estimate the linear regression model that relates the response variable (monthly sales) to the predictor variable (price per pound).

Find the slope of the regression line.
Find the intercept of the regression line.
Write the equation of the linear model.
Using the estimated regression equation,
Estimate the monthly sales for a variety of coffee that costs $12 per pound.
What is the residual for this estimate? What does it mean?

During a promotion, Christina's department store offers a mailing "scratch a winnerdiscount savings." After customers select the items they wish to purchase, they scratch their discount sticker from the mailing to determine the discount they will receive. The scratch wheel is divided into 12 slices. Six slices are red and award a 10% discount, three slices are white and award a 20% discount, and two slices are blue and award a 40% discount. The remaining slice is gold and awards a 100% discount if the customer scratches that slice!

What is the probability that a customer gets at least a 40% discount?

What is the probability that a customer does not get at least a 40% discount?
What is the probability that a customer gets a 10% or 20% discount?
What is the probability that two customers in a row get a 20% discount?

6) A recent survey of local cell phone retailers showed that of all smart phones sold last month, 64% of buyers also owned a tablet of laptop, 28% also owned an iPod type music player and 22% owned both.

What is the probability that a smart phone buyer also owned a tablet/ laptop or a musicplayer?
What is the probability that a smart phone buyer did not also own either a tablet/ laptopor a music player?
Is a smart phone buyer owning a tablet/laptop in addition to a music player mutuallyexclusive? Explain.

6)One explanation put forth for the dearth of women CEO's in the high tech industry is that 7) there are a lack of mentoring opportunities for women. A recent survey of CEO's in that industry found that 80% were men. Moreover, 75% had been mentored while only 15% were women and had been mentored.

Construct the contingency table.
Are gender and mentoring independent? Explain.

A fast food restaurant just leased a new freezer and food fryer for three years. The service 8) contract for the freezer offers unlimited repairs for a fee of $125 a year plus a $35 service charge for each repair needed. The restaurant's research indicates that during a given year 80% of these freezers need no repairs, 11% needed to be serviced once, 5% twice, 4% three times, and none required more than three repairs.

Find the expected number of repairs for this freezer per year.
Find the standard deviation of the number of repairs per year.
What are the mean and standard deviation of the restaurant's annual expense with theservice contract for the freezer?

Internet service providers (ISP) need to resolve customer problems as quickly as possible.
For one ISP, past data indicates that the likelihood is 0.80 that customer calls regarding Internet service interruptions are resolved within one hour. Out of the next 10 customer calls about interrupted service,

What is the probability that exactly 7 will be resolved within one hour?
What is the probability that at least 7 will be resolved within one hour?
How many customers would be expected to have their service problems resolved withinone hour?

At a local manufacturing plant, employees must complete new machine set ups within 30 minutes. New machine set-up times can be described by a normal model with a mean of 22 minutes and a standard deviation of four minutes.

What percent of new machine set ups take more than 30 minutes?

The typical worker needs five minutes to adjust to their surroundings before beginningtheir duties. What percent of new machine set ups are completed within 25 minutes to allow for this?

11) Porcelain tile is often recommended over ceramic tile because its breaking strength tends to be higher therefore making it more durable and long lasting. Based on data collected from its production processes, Crosstiles Inc. determines that the breaking strength of its most popular porcelain tile is normally distributed with a mean of 400 pounds per square inch and a standard deviation of 12.5 pounds per square inch.

Based on the 68-95-99.7 Rule, about what percent of its popular porcelain tile will have breaking strengths between 375 and 425 pounds per square inch?

Based on the 68-95-99.7 Rule, about what percent of its popular porcelain tile will have breaking strengths greater than 412.5 pounds per square inch?

Based on the 68-95-99.7 Rule, describe the breaking strength of the weakest 2.5% of its popular porcelain tile.
11)
A specific automotive part that a service station stocks in its inventory has an 8% chance of being defective. Suppose many cars come into the service station needing this part each week.

What is the probability that the fourth part retrieved from stock is the first defective?
What is the probability that the tenth part retrieved from stock is defective?
What is the expected number of parts retrieved until the first defective part?
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

The option to buy extended warranties is commonplace with most electronics purchases. But doesthe type of purchase affect a consumer's willingness to pay extra for an extended warranty? Data for 420 consumers who purchased digital cameras and laptop computers from a leading electronics retailer are summarized in the table.

                                             Purchased Warranty?

                                                     Yes                                    No                         Total
 Digital Camera                                 30                                       42                           72
Laptop Computer                             145                                      203                          348
Total                                             175                                      245                           420


he probability that a consumer purchases an extended warranty given that he/she has purchased a digital camera is
A) .83 B) .42 C) .07 D) .17 E) .58

14) As accounts manager in your company, you classify 75% of your customers as "good credit" and the rest as "risky credit" depending on their credit rating. Customers in the "risky" category allow their accounts to go overdue 50% of the time on average, whereas those in the "good" category allow their accounts to become overdue only 10% of the time. What percentage of overdue accounts are held by customers in the "risky credit" category?
A) 12.5% B) 62.5% C) 20% D) 93.75%

15) It is estimated that 20% of luxury cars manufactured in 2012 were silver. A car dealership typically sells 20 luxury cars per month. The probability that 8 of the luxury cars sold per month are silver is

A) 0.0222.
B) 0.0006.
None of these.
0.7779.
0.1276.

Engineering Mathematics, Engineering

  • Category:- Engineering Mathematics
  • Reference No.:- M91369881
  • Price:- $16

Priced at Now at $16, Verified Solution

Have any Question?


Related Questions in Engineering Mathematics

Q undirected vs directed connectivitya prove that in any

Q: Undirected vs. directed connectivity. (a) Prove that in any connected undirected graph G = (V, E) there is a vertex v ? V whose removal leaves G connected. (Hint: Consider the DFS search tree for G.) (b) Give an examp ...

All these questions should be answered in matlab 1 generate

All these questions should be answered in MATLAB !!! 1. Generate a set of 3 random patterns of dimension 12 where each value is +1 or -1.(3 random 12*12 matrix) 2. Create a 12-unit Hopfield network (a 12x12 matrix) from ...

I have these questions for a homework assignment and have

I have these questions for a homework assignment and have to show work. This works with MIPS coding language and is the class Introduction to Computer Architecture. 1. Find the 2's complement representation (in 32-bit he ...

Question 1 - many spas many componentsconsider 4 types of

Question 1 - Many spas, many components Consider 4 types of spa tub: Aqua-Spa (or FirstSpa, or P1), Hydro-Lux (or SecondSpa, or P2), ThirdSpa (or P3) and FourthSpa (or P4), with the production of products P1, ..., P4 in ...

Analytical methods for engineers assignment - calculusthis

ANALYTICAL METHODS FOR ENGINEERS ASSIGNMENT - CALCULUS This assignment assesses Outcome - Analyse and model engineering situations and solve problems using calculus. Questions - Q1. Differentiate the following functions ...

Clculus assignment -q1 find the total differential of w

CALCULUS ASSIGNMENT - Q1. Find the total differential of w = x 3 yz + xy + z + 3 at (x, y, z) = (1, 2, 3). Q2. Find the value of the double integral ∫∫ R (6x + 2y 2 )dA where R = {(x, y)| - 2 ≤ y ≤ 1, y 2 ≤ x ≤ 2 - y. Q3 ...

Numerical analysis assignment -q1 define the following

Numerical Analysis Assignment - Q1. Define the following terms: (i) Truncation error (ii) Round-off error Q2. Show that if f(x) = logx, then the condition number, c(x) = |1/logx|. Hence show that log x is ill-conditioned ...

Question what is the signed binary sum of 1011100 and

Question : What is the signed binary sum of 1011100 and 1110101 in decimal? Show all of your work. What is the hexadecimal sum of 9A88 and 4AF6 in hexadecimal and decimal? Show all of your work.

Question a signal starts at point x as it travels to point

Question : A signal starts at point X. As it travels to point Y, it loses 8 dB. At point Y, the signal is boosted by 10 bB. As the signal travels to point Z, it loses 7 dB. The dB strength of the signal at point Z is -5 ...

Show all your work not just the answerswhen you multiply 21

(SHOW ALL YOUR WORK, not just the answers) When you multiply: 21 x 68 you most likely do: 8x1 + 8x20 + 60x1 + 60x20 = 1, 428 So, there are 4 multiplications and then 3 additions. How long would it take a computer to do t ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As