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Mathematics Questions and Answers March 19, 2021

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solve these practice problems The difference between the number of customers in line at the express checkout and the number in line at the superexpress checkout in Exercise 3 is X, - X2 Calculate the expected difference. Reference Exercise 3 A certain market has both an express checkout line and a superexpress checkout line. Let X1 denote the
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1.El promedio anual de gastos de una familia estadounidense en transporte diario es $6312 ( Money , agosto de 2001) con desviacin estndar de $1,000. Suponga que dicha cantidad est distribuida normalmente. Cul es la la probabilidad de que un hogar gaste ms de $5000? Cul es la probabilidad de que un hogar gaste entre $4000 y $6000? En que intervalo

Let p be the population proportion for the following condition. Find the point estimates for p and q. In a survey of 1795 adults from country A, 534 said that they were not confident that the food they eat in country A is safe. point estimate for p,p^, is __. point estimate for q,q^, is__.

1. Find the eigenvalues and bases of the corresponding eigenspaces of matrix _ 1 3 D _ [2 2] . 2. Find the eigenvalues and bases of the corresponding eigenspaces of matrix 1 O 2 A = 1 1 1 1 2 0 Hint: the characteristic polynomial of A is 3000 : A(A 1)(/\\ + 1)
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Eun-Hee has received peer review feedback from a classmate. She understands all the comments and has evaluated how she will respond to each suggestion. Which type of changes should she make first? Multiple choice question. minor revisions spelling edits grammar edits major revisions

A tract of land has a trapezoidal shape with two parallel sides a and b and the distance between them (i.e., height of trapezoid) is h. You are given the following data. Assume that the three measurements are independent. Calculate the area of the tract and its standard deviation.

A hypothetical study that examined Uniform Crime Reports from 1982 to 2005 found that the average rate of forcible rape per 100,000 in Anchorage, Alaska, was 82 ( s = 14) while the average rate in the United States was 40 ( s = 3). Construct 90% confidence intervals for each average rate. Interpret the results. 90 % = 1.65 z-score

Hello can anybody please explain this, i am having a hard time understanding this question Draw a scatterplot of each of the following: A strong positive correlation A strong negative correlation A weak positive correlation A weak negative correlation Give a realistic example of each.

The following probability problem: A bag of MOM's has 5 red, 6 green, 8 blue, and 3 yellow MOM's. What is the probability of randomly picking: (give answer as a reduced fraction) 1) a yellow? 2) a blue or green? 3) an orange
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here are notes from a university : If S is an integral domain and R S, then R is an integral domain. In particular, a subring of a field is an integral domain. (Note that, if R S and 1 6= 0 in S, then 1 6= 0 in R.) Examples: any subring of R or C is an integral domain. Thus for example Z[ 2], Q( 2) are integral domains

Question14 What does it mean when a researcher sets his significance level at 0.05 for his study and hypothesis?

In a game, you toss a fair coin and a fair six-sided die. If you toss a heads on the coin and roll either a3 or a6 on the die, you win$30 . Otherwise, you lose$6 . What is the expected profit of one round of this game? Round your answer to the nearest cent. Enter an expected loss as a negative number.

The quality control manager shuts down an automatic lathe for corrective maintenance whenever a sample of parts it produces has an average diameter either exceeding 2.01 inches or smaller than 1.99 inches. The lathe is designed to produce parts with a mean diameter of 2.00 inches and a standard deviation of 0.005 inches. Assuming normality,

How do I find the solution? Let 2 be a standard normal random variable with mean u = O and standard deviation 0 = 1. Find the percentile. (Round your answer to two decimal places.) 20.01 or the 99th percentile
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What are the coefficient of determination, and non determination? Include a simple correlation between two variables.

READY Topic: Pythagorean Theorem and ratios of similar triangles 1. Find the missing side in each right triangle. Triangles are not drawn to scale. 2. 3. A 65 10 2.5 B C 24 4. 6. 9 D 85 15 15 17
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A scale measuring confidence in the media was administered to a sample. Is there a statistically significant difference between Democrats and Republicans on the scale? Higher scores on the scale indicate greater confidence. Use the five step model and it sentence or two interpreting your results. For full credit, report the t(obtained), and

At a college, 67 % of courses have final exams and 48% of courses require research papers. Suppose that 41% of courses have a research paper and a final exam. Find the probability that a course has NONE of these two requirements. ENteranswer as a decimal to 2 places with a 0 in front. If your answer is just one decimal place, then type for example

A data set whose original x values ranged from 120 through 351 was used to generate a regression equation of =0.06x + 14.2. Use the regression equation to predict the value of y when x=110.

For a set of data with 25 2.5, at least 95% of scores fall between 20 and 30. Ans: T How do we get to know the answer was true? Please include equation and steps. Thank you!

What is the equivalent decimal and percent for 21/25

solve this problem Using the simple interest formula I= Pri, compute the amount of interest earned for $2565.00 at 9- 46 for 5- 3 The interest earned is s (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed. ]
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According to government data, the probability that a woman between the ages of 25 and 29 was never married is 40%. In a random survey of 5 women in this age group: what is the probaility that at most 2 were never married?

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) =40; =16 P (50 x 70) = ?

The time to failure for a continuous-operation monitoring device of air quality has uniform distribution over a 24-hour day. If the day-light is between 5:30 AM and 7:30 PM, obtain the probability that the device will fight during the light.

Letbe uniform on[0, 1/2] Find the PDF() of=/(1) For01, f Y (y) = ? please show all steps thanks

Use simple linear regression to examine the effect of blood lead values on neurological problems as measured by the finger-wrist tapping test State the null hypothesis State the alternative hypothesis When you are stating a hypothesis for a simple linear regression example. Is the Null and alternative the same as any other null / alternative? Or

A certain brand of flood lamps has a lifetime that is normally distributed with a mean of 4,000 hours anda standard deviation of 310 hours. What proportion of these lamps will last between 3,690 and 4,465 hours?(2 marks) What lifetime should the manufacturer advertise for these lamps in order that only 4% of the lamps will burn out before the

which of the following is NOT correct about constructing frequency histograms? a. all class intervals should be of equal width b. the bars of the histogrmas are centered over the classmark (midpoint) c. the 1st and last classes should be open ended to account for extreme points d. there should be no spaces between bars

Studies show social science research oversamples which population?

For this Differential Equation, Determine the particular integral, xp. Also, determine wn and "damping ratio". 2te 4 = 2x" + 8x' + 10x IC: X'(0)=3, x(0)=0
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#8. Claude made semi-annual deposits of $3100 at the beginning of a six-month period into a fund earning 6.8% compounded semi-annually for nine years. No further deposits were made.Explain in detail with all the calculations 8 a. How much will be in the account 15 years after the first deposit? 8 b. How much in total was deposited? 8 c. How much

(CO 4) Determine the minimum sample size required when you want to be 80% confident that the sample mean is within 1.3 units of the population mean. Assume a population standard deviation of 9.24 in a normally distributed population. Group of answer choices 195 83 194 84

(1) What Zone(s) are included in the county's 7 am Monday evacuation order? a) Zone A b) Zone A and B c) Zones A, B and C
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If a car is traveling at 65 mph how fast is the car traveling in feet per minute

At silverstone motor-racing circuit in 2013 Mark Webber set a lap record of 1 minute 33.4 seconds at an average speed of 265.28 km/h. Work out how long a runner, running at an average speed of 15km/h, would take to run round the circuit

Having trouble figuring this problem out. Let 2 be a standard normal random variable with mean p = 0 and standard deviation 0 = 1. Find the value c that satisfies the inequality. (Round your answer to two decimal places.) P(c
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Make an example problem that involves a probability distribution. Make a table to display the problem.

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A poll on a certain policy reports 62% approval margin with an error of 4% what is the confidence interval for this poll, please explain in detail. Thank you.

content area top Part 1 Convert 46 comma 772 inches to miles, using these facts. 1 miequals1760 yd, 1 ydequals3 ft, and 1 ftequals12 in. Question content area bottom Part 1 46 comma 772 inchesalmost equals enter your response here miles (Type an integer or decimal rounded to two decimal places as needed.)

Employing the Normal Distribution 0.5 0.45 Process A 0.4 0.35 0.3 Probability Density 0.25 0.2 0.15 0.1 Process B 0.05 6 8 10 12 14 16 18 Product
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Solve the initial value problem. d3\"_ 2 _ EK tF-ElitllT (E'J The solution is D {Type an implicit solution. Typo an equation using x and y as the 1irarialziltasjl
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I need help with Business statistics. I'm not sure where to load data. Complete the data analysis (as listed below) for the followingvariables: V4 (Income), V6 (Credit Card Debt), V9 (Interest + Penalties and V10 (Credit Score). Your analysis must address the following three questions: Comp a Descriptive Statistics analysis for the above

Given a standard normal distribution (SND) with = 70 and a = 10, what is the area under the curve above Z 1 = 2.57?

Given that DeMorgan's laws are applied, what is the equivalence of ~(R S)? Question 7Answer a. ~R ~S b. R S c. ~R ~S d. R S

MULTIPLE-CHOICE QUESTIONS Complete each question by circling the best answer. 1. What types of additional intraoral images are no longer necessary to supplement a panoramic radiograph when using the full-featured digital panoramic units? a. Periapical b. Bitewing C. Occlusal d. All of the above

What can the Pearson's r tell us? Group of answer choices Causality Direction Covariance Significance

After students receive feedback, they can share their ideas with their peers or in small groups. That way, if one student has a prompt that other classmates are interested in using, they can select their favorite smudent-generated prompt and benefit from their peers' ideas
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a) Use the naive process for one -step-ahea b) Use ForecastX, choose the simple expon quarters. c) Use ForecastX, choose Hot-Winters to fo d) Compare and contrast the forecast accui and (c) in one table. Any comment? e) Plot your final selected forecasts along v graph
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In the following situations, indicate whether you'd use the normal distribution, the t distribution, or neither. a. The population is normally distributed, and you know the population standard deviation. b. You don't know the population standard deviation, and the sample size is 35. c. The sample size is 22, and the population is normally

Convert the exponential equations into logarithmic form: (a) 32 - 9 is equivalent to log, C = D. and D (b) 64 = 4 is equivalent to log, E F. E and F (c) 10* = 10000 is equivalent to log, ,G -H. G = and H (d) 0.01 - 1 10 2 is equivalent to log by K. and K
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nll Verizon '3' 10:19 PHI \"i? 100% [EN webassignnet The 1399 Cleveland Spiders were a historically awful baseball team, nishing with a win-loss record of 2D-134. So. assume that team would win any given game with probability 13%. Find the probability that the Spiders would have won their rst three games played that season. E] Find the probability
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$ Transform each graph as specified below. (a) The graph of y =f (x) is shown. Draw the graph of y = f(2.x). X + (b) The graph of y = g (x) is shown. Draw the graph of y = 78(x). X
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Find the velocity, speed and acceleration of a particle moving along the following: \f
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I have a question about the calculus Describe the interval(s) on which the function is continuous. ( Enter your answer using interval notation.) f ( x ) = X x-+x+7
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Find the value ofZa/2that corresponds to a confidence level of 92%. a)0.04 b)0.4840 c)0.8212 d)1.41 e)1.75

The product team and the design team at ROM Manufacturing are reviewing product quality issues.In an attempt to resolve the conflict between the two teams, the group leader first questions the two teams to determine their interests and needs. He then urges them to work together to find a mutually beneficial solution that will satisfy all their

A sock drawer has 17 folded pairs of socks, with 5 pairs of white, 8 pairs of black and 4 pairs of blue.What is the probability, without looking in the drawer, that you will first select and remove a black pair, then select either a blue or a white pair?

A survey of nonprofit organizations showed that online fundraising has increased in the past year. Based on a random sample of 84 nonprofit organizations, the mean one-time gift donation in the past year was $82, with a (sample) standard deviation of $9. If you test the null hypothesis at the 0.05 level of significance (i.e., 5% level), is there

Complete each sentence with the French equivalent of the expression in parentheses. Vous habitez 1 of 1 (at the house of) vos cousins. Mes crayons sont 1 of 1 (on) tes livres. Je suis 1 of 1 (to the right of) Sonia. Le caf est 1 of 1 (between) le lyce et le mdecin. Il y a une enveloppe pour moi 1 of 1 (on) la table? Elle aime tre 1 of 1 (next to)

I need some help with this question please! 1.Sonnets by the famous Elizabethan poet Bill Jigglelance are known to contain an average of new words (words not used in other works).The standard deviation of new words used in his works are A new manuscript of 8 new sonnets has been unearthed and the debate among scholars is about whether Jigglelance

1. Let Z be some random variable taking values in Z+ = {0, 1,...} with a finite mean. Let X1, X2, ... be i.i.d. Assume that Z, X1, X2, ... are independent. Let Y = _ _ X; (if Z = 0 then Y = 0). Express E[Y] in terms of E[Z ] and E[X1]
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researchers collected the data shown here on a self- esteem questionnaire. At ex = 0.05, can it be concluded that there is a difference in the self-esteem scores of the two groups? Use the P-value method. Leavers Stayers XI = 3.05 X, = 2.96 01 = 0.75 02 =0.75 103 12 = 225
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In 1979, the price of electricity was $0.05 per kilowatt-hour. The price of electricity has increased at a rate of ~ 2.05% annually. If t is the n umber of years after 1979, create the equation that can be used to determine how many years it will take for the price per kilowatt-hour to reach $0.10. Fill in the values of A, b, and c.

10. Solve each of the following sets of simultaneous equations using the matrix method (see Moodle notes on Square Matrices, page 3): (a) 3x + 5y =7, xty=1 (b) 3x + 2y =9, 4x + y =7 (c) 2x + 3y = 11, x - 2y = -5 Optional Questions
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Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 144 adult males, the mean pulse rate is 68.6 bpm and the standard deviation is 11.2 bpm. Find the value of the test statistic.

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Using the data in the StudentSales worksheet, create a Pivot table. 15Put the table in its own sheet and name the sheet StudentSalesAnalysisUse the Type of Purchasein the rows, sum the Amount as the value and format the value as currency with zero decimal places. Change the row label to Type of Purchase. Make sure the columns are wide enough to

The value, V(x), of a car as a function of the number of years after it was purchased, x, is given by V(x)equals=negative 1200 x plus 23 comma 0001200x+23,000. a. Find the value of the car after twotwo years. b. Find the value of the car after eighteight years. c. What does V(1111)equals=98009800 mean? Question content area bottom Part 1 a. The

The accompanying table shows the median household income(in dollars) for 25 randomly selected regions. Complete part A. Median household income (in Dollars) 39,759 40,207 41,208 42,062 42,580 43,654 45,325 47,521 48,907 50,264 70,666 51,743 52,904 53,745 53,963 55,000 55,247 56,221 57,509 60,010 60,977 61,560 62,933 63,288 67,723 A.Income

(5) (15pt) Construct a diffeomorphism from the unit square (0, 1) X (0,1) to the plane R?. Show that what you construct is indeed a diffeomorphism
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Subtract the given expressions. left parenthesis 10 x squared plus 6 right parenthesis minus left parenthesis 7 x squared minus 2 right parenthesis10x2+67x22

Find the measure of the indicated angle to the nearest degree. \f
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Solve the following tri-diagonal system of equations: 6 -2 X1 16 12 8 X2 26 = 0 13 9 3 X3 19 O O 1 - 18 X4 34 Check your answers by substituting them into the original equations, and verify that the solution satisfy the given system
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The following information was available for the year ended December 31, 2022: Sales $ 566,666 Net income ' 86,666 Average total assets 1,666,666 Average total stockholders' equity ' 646,666 Margin for the year ended December 31, 2022 was
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Name two areas where probability is used . Probability deals with events that occur by chance . It is used in gambling and insurance

A data set whose original x values ranged from 41 through 78 was used to generate a regression equation of =5.3x - 21.9. Use the regression equation to predict the value of y when x=81.

Which kinds of menus are planned for a specific time period and then repeated? Cyclical A la carte Table d'hote Du jour

4- Given that X[1,1]=5 j4 in 16 by 16 Fourier transform. What is X[16-1,16-1]?. 5- a)

If a sample of size 100 is taken from a population whose standard deviation is equal to 100, then the standard error of the mean is equal to

The area of the figure to the right is left parenthesis x plus 6 right parenthesis left parenthesis x plus 9 right parenthesis. Find another expression for this area by finding the sum of the areas of the smaller rectangles. x x 6 9 Question content area bottom Part 1 The area is enter your response here. (Simplify your answer.)

Describe the sampling distribution of ^p. Assume the size of the population is 15,000. n-600, p=0.4 Determine the mean of the sampling distribution of ^p Determine the standard deviation of the sampling distribution of ^p

In a poll of 175 randomly selected U. S. Adults, 91 said they favored a new proposition. Based on this poll, compute a 90% confidence interval for the proportion of all U. S. adults in favor of the proposition (at the time of poll). Then complete the table below. Carry your intermediate computations to at least three places. Round your answers to

At this time, the number of people who use a particular health plan is 19,250. The number of people who use the plan is expected to decrease by 14% each year. a. Is a linear or exponential equation most appropriate to model this problem? Exponential Linear Correct: Your answer is correct. b. Write an equation of the type you just identified that

How many ways can 2 people be selected from a group of 6 people to form a team where the specific roles are unimportant? Select Ex: 123 EX: 120 Ex: 1234
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identifi wich sampling technique was used in the following study. A student asks 16 friends to participate in a psicological experient.

Find the x-and y-intercepts \f
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Write the conditioning environments for the rules below deriving [e, e, , e]. In these rules, the underlying form is represented simply as /E/. Use a single underscore (_) to state the environment State your rule in terms of natural classes (e.g. "mid lax vowels") Use C to refer to consonants If a single IPA sound conditions an allomorph, use the

9. (05.01 LC) A lamppost, CAB, bent at point A after a storm. The tip of the lamppost touched the ground at point C, as shown below: What is the height, in feet, of the portion AB of the lamppost? (1 point) 10 cos 50 10 tan 50

on November 22, 2017 Leah deposited $448.00 into a savings account that earned simple interest of 0.52% how much interest was earned and paid into Leah's account on September 18, 2018? On November 22, 2017, Leah depos interest of 0.524. How much cont IT maded Round of mommy ale volumes to six decal phone Is mooched ]
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If triangles DEF and NPQ are similar, what is the length of side q? Question 2E D2.dFNq o 7 so If triangles DEF and NPQ are similar, what is the length of side q? 0 Enter the answer as a fraction
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Approximate the area under the graph off(x) and above thex-axis withrectangles, using the following methods with n=4. f(x)=x2+11from x=2 to x=2 (a) Use left endpoints. (b) Use right endpoints. (c) Average the answers in parts(a) and(b) (d) Use midpoints.

Fill in the Blank Question Fill in the blank question. refers to the adequacy of the operational definition of variables

John averages 58 views perhour onhis webpagewith a standard deviation of 11 views per hour. Suppose John'sviews perhour on his webpage are normally distributed. Let X = the number of views perhour on his webpage. Then X N (58,11). Round your answers to THREE decimal places. Suppose John receives 72 views per hour on his webpage on Sunday. The

Please help. I don't understand what to do. Question 16 (Mandatory) {6 points) v" Saved m __ Compute the probability of the event Democrat, and enter your answer with 3 decimal places. Your
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What is the margin of error for the population mean at 90% confidence level for the following information. Wait Time (Minutes) 5.1 10.8 6.2 4.3 5.7 7.3 4.7 7.5 8.7 5.5 8.7 7.7 6.5 6.2 11.4 8.1 5.5 12,3 6.4 7.2 7.6 9.2 8.9 6.9 4.8 9.4 11.7 5.6 7.1 13.4

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