S
  1. study help
  2. subject categories
  3. sciences
  4. mathematics
  5. april 2023
  6. 08

Mathematics Questions and Answers April 08, 2023

Expert-verified solutions to help you succeed

Using a random sample of 100 students from a campus of approximately 12000 students, 60% of the students in the sample said they were very satisfied with their professors. Find the margin of error in this percent.

don't understand the concept, please explain thank you Does a statistics course improve a student's mathematics skills, as measured by a national test? Suppose a random sample of 13 students takes the same national mathematics exam prior to enrolling in a stats course and just after completing the course. At a 1% level of significance determine
image text in transcribed

A large insurance agency services a number of customers who have purchased both a homeowner's policy and an automobile policy from the agency. For each type of policy, a deductible amount must be specied. For an automobile policy, the choices are $100 and $250, whereas for a homeowner's policy, the choices are $0; $100, and $200. Suppose an
image text in transcribed

The graph ofy=f(x)is shownin blue. Draw the graph ofy=f(1/2x), shown in red, by determining how a stretch or compressionwill transform the location of the indicated blue points. Drag the movable red points to the desired coordinates. Note that decimal points cannot be plotted. Provide your answer below:

Match numbers 1-4 with letter a-d : For any test hypothesis, ANOVA, or Chi Squared, this rule for rejecting HO always applies One-tail test with upper reject region one-tail test with lower reject region two-tail test with lower and upper reject regions Match with... a. test statistics> positive critical value b. test statistic < negative critical

\f
image text in transcribed

How do I do this ? Details A baseball team plays in a stadium that holds 68000 spectators. With the ticket price at $9 the average attendence has been 28000. When the price dropped to $7, the average attendence rose to 34000. Assume that attendence is linearly related to ticket price. What ticket price would maximize revenue? $ Submit
image text in transcribed

1.Give that A and B are independent event . P(B only)=0.3 .p(A and B) =0.2 P(A only) =x P(not or B)=y Determine the values of x and y

It's said before that "correlation does not imply causation." This can also be called spurious correlation, which is defined as a correlation between two variables that does not result from a direct relationship between them. Instead, it results from the variables' relationship to other variables. One example is the relationship between crime and

Benford's Law is a probability rule frequently used by accounting auditors to detect systematic fraud. It states that approximately 19.1% of numbers will begin with the number 2.An auditor decides to investigate a particular firm further if a sample proportion of their invoices, with the invoiced number beginning with a 2, is in the highest 0.5%

help

Hii i need some help with my homework if you could please help. Refer to the following for (1)-(5). Suppose that spending amount at a local grocery store is normally distributed with a mean of $82 and a standard deviation of $23. 1) Using the empirical rule, approximately 68% of the distribution falls between what two values? 2) Your manager is

Which would be best suited for displaying the top ten money-grossing corporations of the world? Select one: a. Histogram b. Circle Graph c. Pareto Chart d. Frequency Polygon

The weight of a small Starbucks coffee is a normally distributed random variable with a mean of 385 grams and a standard deviation of 8 grams. Find the weight that corresponds to each event. (Use Excel or Appendix C to calculate the z -value. Round your final answers to 2 decimal places.) a. Highest 30 percent ___________ b. Middle 70 percent

Let's assume that college football has many divisions. With this, each division has many players and each division has many teams. Given these "incomplete" business rules. What type of relationship is division in with the players and team? a. division is in a 1:m relationship with team and players. b. division is in a 1:m relationship with team

Given two independent random samples with the following results: n1=6 n2=11 x1bar=131 x2bar=109 s1= 14 s2=10 Use this data to find the99% 99%confidence interval for the true difference between the population means. Assume that the population variances are equal and that the two populations are normally distributed. Copy Data Step 1 of 3: Find the

Explain, as you would to a 10 years old or someone who had no knowledge of statistic, the difference between Type 1 and Type 2 errors? Please feel free to use humor if it conveys the message.

Problem Set 1 When you use the Kalon test kit 155 samples test positive, 143 of which were also positive by Western Blot. The remaining samples test negative but two of these samples are considered false negatives compared to Western Blot. Recall: First, you tested all of the blood samples with the Western Blot test. The test showed that 145 of

According to Allen's rule, we would expect to find rabbits's with shorter ears nearer the equator to limit water loss. Group of answer choices True False

show graph

Suppose you roll two, regular dice with a single throw. What is the probability of either of the two die landing on 4?

In an experimental treatment, a random individual scores 52 on a measurement.People in general are normally distributed with a mean of 34 and a standard deviation of 8.The researcher predicts that the treatment will have an effect on the subject, but does not specify if the measurement will increase or decrease.Using a 5% significance level (p <

When(2x 3 -3x 2 -11x+6) divided (x+1) the remainder is= 0 -42 12 None of the above.

Find the amplitude, period, phase shift (indicate left or right), and five key points on the graph. Graph (show at at least one period). \f
image text in transcribed

For each item, find the slope of the tangent line at the given point using any of those two equations. Then, determine the equation of the tangent line in the form y y, = m(x + x,). Show your solutions. 1. f(x) = 3x? 2x; (1,5) xX+2 2. f(x)== (1,3) 3.f(x)=x*+3x+1;(1,5) 4. f(x) = 2x3; (3,-54) 5. f(x) =3x?+1; (2,13)
image text in transcribed

In a short string of holiday lights, when at least one bulb in the stringstops working thenall of the lights go out. Assume that each bulb works or fails independently of the other bulbs, and suppose that each bulb has a 98% chance of working throughout the holiday season. On a string ofeight bulbs, what is the probability that all eight lights

Let F(x) = x^2+2x-4 Find the equation of the line tangent to the graph of F(x) at the point (0,f(0)) show below Equation of the tangent line: y = _____

Need some help and advice on this textbook question Sketch the graph of the given function by determining the appropriate information and points from the first and second derivatives. y= x5 - 6x2 - 63x What are the coordinates of the relative maxima? Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
image text in transcribed

The following data are the number of days of vacation time remaining for a sample of 10 employees at a company. 961010125223 Find the standard deviation (by hand). Round your answer to the nearest tenth.

Please show all work 1. The basketball stadium is putting new seats into one of their sections. They need a total of 576 seats. If they can only order seats in groups of 10 what is the least number of seats the stadium can order so that they will have enough
image text in transcribed

Scientific Notation \f
image text in transcribed

The velocity of a rocket, in feet per second, of a rocket t seconds into vertical flight is given by v(t) = -3t 2 + 192t.Find an expression h ( t ) that gives the rocket's altitude, in feet, t sec after liftoff.What is the altitude of the rocket 30 seconds after liftoff?

Here is the question: Question 21 (1 point) A survey of 180 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. The result of the survey is that 126 of the 180 students responded "yes." An approximate 95% confidence interval is (0.633,0.767). Choose the most appropriate answer,
image text in transcribed

6.3 Combinations and Permutations For this problem, express your answers as arithmetic expressions that evaluate to a number that answers the question. You do not need to simplify your answers. C(n, k), P(n, k), (), factorials and arithmetic operations are all okay. 0 (25 points each) We have 16 workers, 9 men and 7 women. a) How many ways to

What are one of the drawbacks of the drypoint process which results in making fewer prints per matrix? Multiple Choice The ink dries quickly. The ink requires a great deal of preparation. Drypoint burrs are quickly worn down. The metal plate is fragile. The acid used in the process wears down the metal plate

A sample of 25 freshmen and senior students at a major university completed a survey that asked about the extent of their satisfaction with the parking situation on campus (the higher the score, the greater the satisfaction). Freshmen 1043303045 4012404235 4525103350 4232381147 2226373810 Seniors 1045352750 3510504030 4010103710 4015302043

Out of 443 applicants for a job, 225 have over 10 years experience and 62 have over 10 years of experience and have a graduate degree Consider that 91 if the applicants have graduate degrees. What is the probability that a randomly chosen applicant has over 10 years experience, given that the applicant has a graduate degree

Lea los artculos 12-14 de la Ley de Comercio exterior y definir los siguiente: 1. Es un impuesto que se aplica a la importacin o exportacin de mercancas para efectos de la Ley de Comercio Exterior de Mxico (art.12)

1.Imagine you are in a game show.There are 10 prizes hidden on a game board with 100 spaces.One prize is worth $50, three are worth $20, and another six are worth $10.You have to pay $5 to the host if your choice is not correct.Let the random variable x be the winning. a.Complete the following probability distribution. (Show the probability in

A committee of three students is required to organise the school formal. Suppose that a group of eight students, consisting of g girls and b boys, have volunteered for the committee. If the committee is selected at random from this group: a) Find an expression, in terms of g, for the probability that there is exactly one girl on the committee. b)

Find z such that 6% of the standard normal curve lies to the right of z . (Enter a number. Round your answer to two decimal places.) z =

Why do null hypotheses represent relationships in populations while research hypotheses represent relationships in samples? Why is it important to write hypotheses prior to analyzing data? why would a directional hypothesis be more appropriate than a nondirectional hypothesis in particular situations?

S = [-1, 0, 2, 7, 10, 13] G = the number is Greater than 0 M = the number is at Most 2 Z = number is Zero L = number is a Less than 1 Which events are disjoint? Question 2 options: G and M G and Z G and L M and Z L and M L and Z None of the 2 events are disjoint select all that apply

What important theorem in statistics impliesthat, for a large samplesize, the possible sample proportions of that size have approximately a normaldistribution? A. The stratified sampling theorem B. There is no such theorem. C. The central limit theorem

The owner of Maumee Ford-Volvo wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year.

The probability of a randomly selected adult in one country being infected with a certain virus is 0.005. In tests for thevirus, blood samples from 26 people are combined. What is the probability that the combined sample tests positive for thevirus? Is it unlikely for such a combined sample to testpositive? Note that the combined sample tests

A. The Century National BankRefer to the Century National Bank data. Using checking account balance as the dependent variable and using as independent variables the number of ATM transactions, the number of other services used, whether the individual has a debit card, and whether interest is paid on the particular account, write report indicating

Part 2 Question 4 Suppose a study reports that the average price for a gallon of self-serve regular unleaded gasoline is $3.16. You believe that the figure is higher in your area of the country. You decide to test this claim for your area of the United States by randomly calling gasoline stations. Your random survey of 25 stations produces the
image text in transcribed

The medal count for the 2018 winter Olympics is recorded below. Run an independence test to find out if the medal won is dependent on country. Use ?=0.10. \f
image text in transcribed

Exercise 3. Consider a sentence = Vz (Q(z) vV 32Vy ((P(f(x), z) A Q(a)) V Vz R(y, z, g(x))))- 1. Draw its syntax tree. (5 marks) 2. List all the sub-formulas, terms, predicates, functions, and free variables in . (15 marks) 3. Specify a model for (a structure that satisfies ). This consists of a universe and interpretations of the predicates and
image text in transcribed

I have a question about Stochastic Process homework question. 1.17. A sociology professor postulates that in each decade 8 % of women in the work force leave it and 20% of the women not in it begin to work. Compare the predictions of his model with the following data on the percentage of women working: 43.3 % in 1970, 51.5 % in 1980. 57.5 % in
image text in transcribed

I need help Suppose Xn is an increasing sequence of positive random variables that con- verges to the integrable random variable X. Show that XndP XdP, A JA for every measurable set A
image text in transcribed

The speed of cars on a stretch of road is normally distributed with an average 42 miles per hour with a standard deviation of 5.9 miles per hour. What is the probability that a randomly selected car is violating the speed limit of 50 miles per hour? Group of answer choices 0.59 0.91 0.09 0.21

Two surgical procedures are widely used to treat a certain type of cancer. To compare the success rates of the two procedures, random samples of the two types of surgical patients were obtained and the numbers of patients who showed recurrence (happened again) of the disease after a 1-year period were recorded. The researcher is wondering if there

\f
image text in transcribed

Four factors are thought to possibly influence the taste of a soft-drink beverage: type of sweetener (A), ratio of syrup to water (B), carbonation level (C), and temperature (D). Each factor can be run at two levels, producing a 2 4 design. At each run in the design, samples of the beverage are given to a test panel consisting of 20 people. Each
image text in transcribed

1. Find the Maclaurin series for f(x) = 27 using the definition of Maclaurin series. Also, find the associated radius of convergence. 2. Find the Maclaurin series for f(x) = In(1 + x) using the definition of Maclaurin series. 3. Use the binomial series to expand the function f(x) as a power series. State the radius of convergence. (a) f(x) = Vr +
image text in transcribed

13. (0.5 + 0.5 + 1 + 1+ 1 = 4 marks) A study was conducted to compare the length of time between men and women to assemble a certain product. Sample standard deviation in a random sample of times for 11 men was 8.6 minutes, and sample standard deviation in a random sample of times for 13 women was 6.9 minutes. Past experience indicate that
image text in transcribed

Americans receive an average of 19 Christmas cards each year. Suppose the number of Christmas cards is normally distributed with a standard deviation of 5. Let X be the number of Christmas cards received by a randomly selected American. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N( b. If an American
image text in transcribedimage text in transcribed

The following is data for the first and second Quiz scores for 8 students in a class. First Quiz Second Quiz 10 10 11 10 14 14 22 16 33 27 34 35 42 38 49 41 Plot the points in the grid below, then sketch a line that best fits the data. 45 40 35 30 25 20 15 10 5 10 15 20 25 30 35 40 45 5( Clear All Draw:0
image text in transcribed

(CO 3) Sixty-four percent of those that use drive through services believe that the employees are at least somewhat rude.If you asked 87 people who use drive through services if they believe that the employees are at least somewhat rude, what is the probability that at most 50 say yes? Group of answer choices 0.124 0.015 0.915 0.039 In the

A car insurance company has determined that 6% of all drivers were involved in a car accident last year. Among the 12 drivers living on one particular street, 3 were involved in a car accident last year. If 12 drivers are randomly selected, what is the probability of getting 3 or more who were involved in a car accident last year ?

Find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the x-axis. y = x- + 3 y = -x-+ 2x+7 X = 0 X = 3
image text in transcribed

please i need help answering question # 37, attached, please explain step by step.

Imagine that you are a psychologist who has invented a new medication ("Wildcatozine") to treat people with depression. You predict that depressed individuals who take Wildcatozine will experience fewer depression symptoms than depressed individuals who do not take the medication, but now you need to test this hypothesis. You recruit a sample of n

Find themean, , for the binomial distribution which has the stated values of n and p. Round answer to the nearest tenth. n=676; p=0.7

A crane with a 3000 kg counterweight and 700 kg arm is capable of holding a 1,200 kg load in equilibrium. Determine the position of the crane's pivot point as a function of the arm length, L. Question 2Select one: a. 0.25 L b. 0.32 L c. 0.15 L d. 0.34 L

Evaluate the following expression: left parenthesis 7 minus 3 right parenthesis cross times square root of 25 cross times 2 minus 10 a.) 40 b.) 30 c.) 0 d.) -33

Use technology to solve the following problem: A normal population has a mean = 31 and standard deviationWhat is the probability that a randomly chosen value will be greater than 18? options: A: 0.0316 B: 0.9684 C: 0.6386 D: 0.9088

How do you create data range 0.00 -24.99 25.00 - 49.99 and so on automatically in excel?

Suppose an x distribution has mean = 2 . Consider two corresponding x distributions, the first based on samples of size n = 49 and the second based on samples of size n = 81. (a) What is the value of the mean of each of the two x distributions? For n = 49, x= For n = 81, x= (b) For whichx distribution is P ( x >2.5) smaller? Explain your answer.

If one is making a two-tailed test and the value of the z test statistic is -11.12, a correct conclusion from this A. do not reject Ho B. a type II error has been made C. reject Ho D. reject Ho at the .05 level but not at the .01 level

Let x be a random variable representing dividend yield of bank stocks. We may assume that x has a normal distribution with =1.9%.A random sample of10 bankstocks gave the following yields (in percents).5.74.86.04.94.03.46.57.15.36.1The sample mean is= 5.38%. Suppose that for the entire stock market, the mean dividend yield is =4.5%.Do these data

Independent samples of size 30 and 55 from two normal populations having a common variance 17.6 were found to have means 23.0 and 21.9 respectively. Find 95% confidence limits for the difference of population means.

What would be the value of queues Q1 and Q2, and stack S after the following algorithm segment: 1S = createStack 2 Q1 = createQueue 3 Q2 = createQueue 4 enqueue (Q1, 2) 5 enqueue (Q1, 4) 6 enqueue (Q1, 6) 7 enqueue (Q1, 0) 8 enqueue (Q1, 8) 9 enqueue (Q1, 3) 10 enqueue (Q1, 2) 11 enqueue (Q1, 4) 12 enqueue (Q1, 6) 13 loop (not emptyQueue (Q1)) 1

At a local high school football game, an unknown yellow vapor cloud has begun to spread from a package hidden under the bleachers. What should the immediate precautionary distance be until the possible chemical agent is identified? Question 8Answer a. 75 feet b. 150 feet c. 330 feet d. 500 feet

Suppose the null hypothesis is rejected. State the conclusion based on the results of the test. Six yearsago, 12.8% of registered births were to teenage mothers. A sociologist believes that the percentage has decreased since then. Which of the following is the correctconclusion? A. There is sufficient evidence to conclude that the percentage of

Two machines are used for filling plastic bottles with a net volume of 16.0 ounces. The filling processes can be assumed to be normal. The quality engineering department is concerned that the second machine (Machine 2) is under filling the water bottles compared to the first machine (Machine 1). An experiment to address this concern is performed

Valeria no volver con su exnovio Csar y tal vez visitar a Antonio en Texas. 1. select answer enter answer a la universidad para terminar los estudios. 2. select answer enter answer una exposicin de fotos de Puerto Rico en el Museo de Arte

An investigator wants to determine if dice produced by a particular manufacturer are fair. They purchase a large quantity of dice and perform many thousands of experiments of rolling the dice and recording the number that comes up. Which statistical test could they use to determine if the dice are fair by comparing the results of their experiment

1.In a two-factor factorial experiment with at least one random factor (circle all the correct answers) a. the statistical tests on main effects are identical to the corresponding main effects tests in the fixed-effects case. b. the statistical tests on main effects are different from the corresponding main effects tests in the fixed-effects case.

Here is the Question: Question 1'9 [1 point] A large software development firm recently relocated its facilities. Top management is interested in fostering good relations with their new local community and has encouraged their employees to engage in local service activities. They want to test if the firm's professionals volunteer an average of
image text in transcribed

TABLE 3.13 Data for a Sample of 100 Credit Card Purch ases at Pelican Stores Type of Net Method of Marital Customer Customer Items Sales Payment Gender Status Age 1 Regula r 39.50 Discover Male Married 32 2 Promotional 102.40 Proprietary Card Female Married 36 3 Regular 1 22.50 Proprietary Card Female Married 32 4 Promotional 5 100.40 Proprietary

A physics quiz consists of 5 multiple-choice questions and 5 True/False problems. Each of the multiple-choice questions has 3 choices, with one correct choice per question.If you select one of the options per each question and leave nothing blank, in how many ways can you answer the questions?

Three research departments have6,9, and7 members, respectively. Each department is to select a delegate and an alternate to represent the department at a conference. In how many ways can this be done?

................. (200 points) Suppose that a population develops according to the logistic equation Q = 0.25P 0.00125P2 dt where t is measured in weeks. (a) What is the carrying capacity? (b) Is the solution increasing or decreasing when P is between 0 and the carrying capacity? (c) Is the solution increasing or decreasing when P is greater than
image text in transcribed

Multiple Regression. This data is based on a random sample of housing sales in Newark, DE from 2005 to 2008.The total sample size is 131 houses.The dependent variable is PRICE in $1,000s (the actual sale price is divided by 1,000).We will look at four independent variables. AREAThe total square footage of the house LOTSIZEThe size of the lot in
image text in transcribed

In triangle DEF, if mD is (2x), mE is (3x 2), and mF is (x + 8), what is the value of x? 29 31 34 59

Use theTeamsdata frame from the Lahman package. Fit a multivariate linear regression model to obtain the effects of BB and HR on Runs ( R ) in 1971. Use thetidy()function in the broom package to obtain the results in a data frame. What is the estimate for the effect of BB on runs? What is the estimate for the effect of HR on runs?

Question 2 2pts (CO 6) Two variables have a negative linear correlation. Does the independent variable increase or decrease as the dependent variable increases? Group of answer choices Independent variable decrease Independent variable increases Cannot determine from information given Independent variable would remain the same

1. In a study considering any differences in weight loss among rats (two groups:stressed vs. unstressed), the table below lists the 2 groups, the number in each, themean amount of weight lost (in grams) and the standard deviation of each group.The question is to find the 90% confidence interval: Group A Stressed: n=29 x-bar=2.7 s=0.22 Group B

Factors that contribute to towards bridging and digital divide in South Africa

Suppose you wanted to conduct a research study on how foster car effects ptsd in children and how is that different from the development of children who do not have to go thru thaT. What method would you use? What is the information on the participants and the setting? What materials are needed? What is the experimental design to be used, and what

A trainer wants to know if his interventions benefit his clients. He therefore measures the time to finish five-kilometer course with 20 of his clients at the start of his interventions and measures the time to finish the course after one month of training. It gets the following results in minutes: Time 1 Time 2 18.47 19.01 28.49. 27.59 25.25

(Problem 12) Human heights are known to be normally distributed.Men have a mean height of 70 inches and females a mean height of 64 inches.Both have a population standard deviation of 3 inches. (a - 2 points) Find the 1 st Quartile (Q1) of the male height distribution (b - 2 points) What is the probability that a randomly selected female is above

Wayne 99 167 68 259 173 167 22 189 209 234 130 12 188 50 108 83 15 42 147 61 74 68 103 201 94 191 83 77 208 85 128 67 95 79 125 179 223 52 167 103 84 192 166 170 162 54 254 Dover 19 69 94 75 160 124 100 94 29 89 126 108 29 74 74 97 15 132 82 24 57 136 193 141 28 55 82 105 20 67 130 61 53 120 158 59 110 107 63 89 44 106 103 46 58 133 101 71 135 98
image text in transcribedimage text in transcribed

You ask learners to select their course section number for your survey. For example, (1) 101, (2) 102, (3) 103. What type of variable is course section in this example?

1.Correlation: Correlation Does Not Mean Causation One of the major misconceptions about correlation is that a relationship between two variables means causation; that is, one variable causes changes in the other variable. There is a particular tendency to make this causal error, when the two variables seem to be related to each other. What is one

Show how to solve the MINIMUM WEIGHT EDGE COVER PROBLEM in polynomial time: given an undirected graph G and weights c W E.G/ ! R, find a minimum weight edge cover

I got the answer 6.49 can anyone explain to me how that is less than alpha which is 0.1 BUSI 1033 BUSINESS STATISTICS Hypothesis Tests About u, - U2: o, and o, Known Example: Par, Inc. Can we conclude, using = .01, that the mean driving distance of Par, Inc. golf balls is greater than the mean driving distance of Rap, Ltd. golf balls?BUSI 1033
image text in transcribedimage text in transcribed

Showing 1000 - 1100 of 1506
  • 11 / 16