Mathematics Questions and Answers August 13, 2020

The use of substances Other than Nicotine in Electronic Cigarettes Among college students. This study is not without limitations and thus findings should be interpreted within the context of its limitations. The present research reports on data collected in 2014. Hence, the current findings may underestimate the incidence of OSUE in the

The weight of trucks traveling on a particular section of I-475 has a population mean of 15.8 tons and a population standard deviation of 8.2 tons. What is the probability a state highway inspector could select a sample of 49 trucks and find the sample mean to be 14.3 tons or less

1) When we reject the null hypothesis, we have evidence that the difference observed is Group of answer choices a Type I error. due to chance; not likely the result of chance; very small; 2) A one-tailed test is proper when Group of answer choices you do not have enough data for a two-tailed test; you are only interested in finding out if the

Match these values of r with the accompanying scatterplots: - 0.706, - 0.995, 0.339, - 0.339, and - 1 Click the icon to view the scatterplots. Scatterplots Scatterplot I Scatterplot z Scatterplot S Match the values of r to the scatterplots Scatterplot 1, r = - 1 Scatterplot 2, r= 0.995 -2- Scatterplot 3, r= 0.339 -3- Scatterplot 4, r= -0.706 0 0.2

Two independent samples of sizes 31 and 35 are randomly selected from two normally distributed populations with equal but unknown population variances. Which test statistic we should use to test the difference between the population means?

3. Voici certains des degrs de libert obtenus suite l'analyse de variance mesures rptes: dl trait = 4, dl inter-sujets = 7, dl total = 35. Expliquez pourquoi ces rsultats sont impossibles.

INDIVIDUAL ASSIGNMENT (15%) TOPIC 8: REGRESSION AND CORRELATION A Medical Officer of Ministry of Health (MOH) Malaysia has been instructed to determine whether the number of confirmed cases of Covid-19 affects the number of deaths. He hypothesized that as number of confirmed cases increases, number of deaths increases He randomly selected a

Given the following values for an undesirable outcome variable such as number of incidents of verbal abuse, the Cohen's d effect size is: Experimental group mean = 5 Control group mean = 8 Standard deviation = 2 a. + 3.0 b. - 3.0 c. + 1.5 d. - 1.5

Instructions 1) Consider a population with values (3,5,7,9) a) Find the population mean. b) Find the population variance. c) Find the population standard deviation. d) Find all possible samples of size 2 which can be drawn with replacement from this population c)Find the mean of the sampling distribution means.

Question 22 Engineers must consider the diameters of heads when designing helmets. The company researchers have determined that the population of potential clientele have head diameters that are normally distributed with a mean of 6.7-in and a standard deviation of 1-in. Due to financial constraints, the helmets will be designed to fit all men

SCENARIO 10-5 To test the effectiveness of a business school preparation course, 8 students took a general business test before and after the course. The results are given below. Exam Score Exam Score Student Before Course 1 11 After Course (2) 1 530 670 2 690 770 3 910 1,000 4 700 710 5 450 550 6 820 870 7 820 770 8 630 610 Referring to Scenario

.Question 11 At two years of age, the lengths of sardines have an approximately bell-shaped and symmetric distribution with a mean of 21.2 cm and a standard deviation of 0.7 cm. 1. The middle 68% of sardines have a length between ( cm. 2. The middle 95% of sardines have a length between ( cm. 3. The middle 99.7%% of sardines have a length between

ps://learn.zybooks.com/zybook/MAT-240-J5385-OL-TRAD-UG.22EW5/chapter/4/section/2 AT 240: Applied Statistics home > 4.2: Normal distribution zyBooks c Fee PARTICIPATION ACTIVITY 4.2.3: Finding a z-score given a probability. The GRE (Graduate Record Exam) scores for both verbal and quantitative reasoning are approximately normally distributed and

Question 6 Not yet answered Points out of 1 P Flag question According to the Chebyshev rule, at least 75% of all observations in any data set are contained within a distance of how many standard deviations around the mean? Select one: Oa. 1 Ob. 2 Oc. 3 Question 7 Not yet answered Points out of 1 P Flag question A boxplot is a graphical

Application Exercise: A school psychologist wants to know if there is a relationship between positive mood and creativity. Below are the data from a random sample of 4th graders: What can be concluded with ir = 0.107 mood creativity 10 a) Select and compute the appropriate statistic. -Select- b) Obtain/compute the appropriate values to make a

The sales manager of a car company wants to study car sales. He chooses what factors are thought to affect car sales in all agencies. These factors are ad impressions (in minutes), and the number of salesmen who remain agents. The study was conducted on 12 agents taken at random. The research data are:

What is the probability if the dealer is showing a 7 and you have a K-5 that the dealer's unknow card worth 10 points? What makes the game tricky? You have decide what do before you know what the dealer's final sum is. Using the point values given above, answer the following questions. What is the probability if the dealer is showing a 7 and you

Statistical Literacy Which of the following are continuous variables, and which are discrete? (a) Number of traffic fatalities per year in the state of Florida (b) Distance a golf ball travels after being hit with a driver (c) Time required to drive from home to college on any given day (d) Number of ships in Pearl Harbor on any given day (e) Your

Question 2 of 8 1 Points The probability that the mayor of Mathville will stand for another election is - . If she doesn't choose to run then her deputy will definitely run in the election, however if the mayor does run in the election her deputy mayor will not run against her. The probability that the mayor would be reelected if she ran is >. If

5. Calculate the values of Q1 and Q3 for the following sets of data. a 1, 3, 3, 3, 5, 6, 6, 7, 7, 7, 8, 8, 9, 10, 10, 10. b 12, 13, 22, 23, 30, 41, 48, 49, 50, 51, 63, 64, 70, 75, 77, 80. c -2.91, -2.78, -2.61, -2.59, -2.03, -1.65, -1.48, -1.14, 0.26, 0.74, 1.78, 1.86, 1.95, 2.04, 4.04, 4.38. Infant mortality rates 0 "7 The ordered stem plot shows

Problem 2: Conduct your own survey! Survey 25-30 individuals and ask them ifthey have a pet. Use their 'yes' responses to create a 99% confidence interval about the proportion of individuals that have a pet. a Copy StatCrunch output to Word. 0 Write a one sentence conclusion based on your output. 0 Based on these results, do you believe, with 99%

A pilot heads his jet due east. The jet has a speed of 475 mi/h relative to the air. The wind is blowing due north with a speed of 40 milh. (Assume that the i vector points east, and the j vector points north.) (3) Express the velocity of the wind as a vector in component form. (b) Express the velocity of the jet relative to the air as a vector in

Chapter 3: Probability (basic) Score: 0/4 0/4 answered Question 3 A survey of athletes at a high school is conducted, and the following facts are discovered: 76% of the athletes are football players, 21% are basketball players, and 6% of the athletes play both football and basketball. An athlete is chosen at random from the high school: what is

f ( x ) = x 2 + x 6 x 2 x 1 2 Find the domain of f. Identify any vertical asymptotes of the graph of y = f(x). Identify any holes in the graph. Find the horizontal asymptote, if it exists. Find the slant asymptote, if it exists. Graph the function using a graphing utility and describe the behavior near the asymptotes

What is the average word length of the Gettysburg Address

What is the average word length of the Gettysburg Address

You wish to determine if the proportion of people who support that an idea has increased from 5 years ago. It is known that the proportion of people who supported the idea 5 years ago was 30%. You take a random sample of 125 people and determine that 42 people support an idea. Does the sample data provide evidence that the proportion of people who

Part O 10 Part 1 of 10 (a) AsX cot f (x) e

3. The mean score of a Grade 5 class in a student-conducted examination is 87. While conducting the study, the students informed the classroom teachers that some of their students showed unusual potential for intellectual gains. Soon after, the six students identified to teachers as having potential for unusual intellectual gains took the

M Search results - Ipearl@commun x | Home D21 6-2 Participation Activities: Conf x zy Section 6.2 - MAT 240: Applied S: @ @ learn.zybooks.com/zybook/MAT-240-15406-OL-TRAD-UG.22EW5/chapter/6/section/2 zyBooks My library > MAT 240: Applied Statistics home > 6.2: Confidence intervals for population means zyBooks catalog ? Help/FAQ & Kristin Segovia

Question 23 2 0/ 1 pt ' 96-97 99 0 Details Score on last try: 0 of 1 pts. See Details for more. Get a similar question You can retry this question below Let f(z) = (2+6)2 Find a domain on which f is one-to-one and non-decreasing. X Find the inverse of f restricted to this domain f -'(z) X Question Help: Message instructor D Post to forum Submit

2.5: Graded Homework egcc.instructure.com MTH120 > Assignments > 2.5: Graded Homework FA22_FOURTH 2.5: Graded Homework Home Due Sunday by 11:59pm Points 14 Submitting an external tool Available after Oct 24 at 12am Announcements Syllabus 2.5: Graded Homework Progress saved Done # Vo Assignments Score: 1/14 1/14 answered Grades Question 5 0/1 pt 9

A certain drug can be used to reduce the acid produced by the body and heal damage to the esophagus due to acid reflux. The manufacturer of the drug claims that more than 91% of patients taking the drug are healed within 8 weeks. In clinical trials, 205 of 223 patients suffering from acid reflux disease were healed after 8 weeks. Test the

questions are below: Determine whether the given function is a solution to the given differential equation. 0 =5 e 5t - 2 3t d'e de + 40= - 3e 3t dt 2 The function 0 = 5 e 5t - 2 e 3t AP d20 a solution to the differential equation at + 40 = - 3 es, because when 5 e 5t - 2 e 3t is substituted for 0, |is substituted for f and |is substituted for- 2

which of the following is(are) not possible value(s) of Pearsons correlations? choose all that apply a) 0.1 b)0.05 c) 1.6 d) -78 e -1.08

coins 5. standing on a 384 foot platform and throws a stack of Gold upwards with a velocity of 160 feet per second. At the same time, his assistant is standing on a 208 foot platform and throws a stack of Red up into the air with a velocity of 192 feet per second. coins coins a. Write an equation for the position of each stack of Is at any time t.

Can I have some help with this An oil exploration company purchases drill bits that have a life span that is approximately normally distributed with a mean equal to 71 hours and a standard deviation equal to 12 hours. (Round your answers to four decimal places.) l uses (a) What proportion of the company's drill bits will fail before 62 hours of

A survey showed that 32% of human resource professionals are at companies that rejected job candidates because of information found on their social media. If 26 human resource professionals K are randomly selected, would 15 be a significantly high number to be at companies that rejected job candidates because of information found on their social

TH 3200: PROBABILITY THEORY - Page 7 of 9 (b) (2 points) Suppose that a set of student grades for a particular class fits a Gamma distri bution with a = 2, and 3 = 4. Calculate the probability that a student's grade lies between the mean, u, and 2/. 100.0 30.0 50.0 80.0 01.0 10.0 TO.0 20.0

A pet store has 7 cats. Here are their weights (in pounds). 16, 6, 8, 8, 13, 7, 13 Send data to calculator Find the mean weight of these cats. If necessary, round your answer to the nearest tenth

DATA SET: https://www.statcrunch.com/app/?dataurl=http://www.statcrunch.com/books/CQL/dataset/Fuel_Economy.txt&dlim=tab&ft=true A federal government agency that is responsible for setting vehicle fuel economy standards for automobile manufacturers is conducting research in order to update its fuel economy standards for the year 2030. Automobile

Please solve the following problem. Problem 6 The heights of men in the United States are normally distributed with mean (19.1 inches and standard de viation 2.9 inches. The heights of women are normally distributed with mean ll inches and standard deviation 2.? inches. Let Jr be the average height of Ill randomly sampled men. and y be the average

Use the F table to find the critical value with dfb=5 and dfw=29 (alpha = .05). Please provide an explanation so I can clarify my thinking. Thank you

Q3: Preview [24 pts] A sequence (an ) n=1 is given by a1 = 3 and an = for n > 2. 6 - an-1 a) Use mathematical induction to prove that 0

Give 5 business examples of situations where the following concepts can potentially be used. 1. Prisoner's Dilemma (Nash Equilibrium) 2. Shapley Value

What is the slope of the tangent line to the curve given by x=sin(y) at the point (0, 3x)? O -1 01 0 1 O It is undefined. D Question 8 1 pts

Que le sucede al perodo del pndulo cuando el elevador se mueve hacia arriba a 0,5 m/s^2 constante ? Un pendulo simple se monta en un elevador

Table 24 29 6 17 9 31 21 19 15 22 25 11 27 23 35 13 28 18 26 Calculate the following measures for the data set in Table 1.1: 3.1 the arithmetic mean [4 marks] 3.2 the mode [3 marks] 3.3 median [3 marks] 3.4 the quartile deviation [5 marks] 3.5 the standard deviation [5 marks]

1. Describe how to convert a log equation into an exponential equation. 2. Use this method to convert Logg 2x) = 3 into an exponential equation and solve for x. 3. Describe how to convert an exponential equation into a log equation. 4. Use this method to convert 2 '9' 2 15 into a log equation and solve for x

Q6)As a development economist, you are interested in whether individuals in country A have a lower mean income than those in country B. You have available independent random samples of size 50 each from the two populations. In these samples, XA=$500sA=$200XB=$600sB=$300 Assuming the population variances are equal, find the p-value and test the

Prove by definition of limit 2x3 13 lim 3 lim 2

Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the z-score of a man 73.2 inches tall. (to 2 decimal places)

Find an equation of the tangent line to the curve at the given point. y = 7e* + x, (0, 7)

Use logarithmic differentiation to find the derivative of y. (Inx In(x 7))

1. Use First Principles (F. P) to nd the slope of the tangent of the function below, and then evaluate when x=3. For full marks, check your answer by taking the derivative of the function using any method. Show all of your work/steps for full marks. (6 marks) f (X) = Vx - 4

7. Find the marginal densities of X and Y given their joint probability density IN f (x, y ) = (2 + 4y) for 0

Three research departments have 10, 9, and 7 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

28. A random card is selected from a well-shuffled deck. a) What is the probability that a king is selected? b) Given that you have selected a card from a RED suit, what is the probability that a king is selected? c) Does the occurrence of knowing that the card has been selected from a red suit affect the probability of a king being selected? In

Range of a horizontally launched projectile is given by: R = v x 2 H g Explain how you can graphically obtain gravitational field strength g, by plotting R 2 vs. H. Use this graph to calculate g and compare it with known value of 9.81 m/s2 . (Paste the graph with linear fit here.)

Complete the table. Ages Number of Cumulative students Frequency 15- 18 8 19- 22 9 23- 26 8 27- W 30 31- 34 5 35- 38 7 Question Help: B Written Example Message instruct Question 10 0/1 pt 9 3 99 0 Detail

We have a random sample of size 30 from a population. the standard deviation is 13 and the sample mean is 58.6. How large should the sample be if 90% confidence is desired that the estimate u differs from the confidence by at least 0.05? a) 182927.9 b) 259692.16 c) 58.98 d) 0.13 e) None of the above

Suppose that you are testing the following hypotheses where the variance is known : H0:u= 100 H0:u= 100 Find the P- value for the following values of the test statistic. a. Z0 = 2.75 b: Z0 =1.86 c: Z0 = -2.05 d: Z0 = -1.86

2 . The exponential distribution Consider the random variable X that follows an exponential distribution, with The standard deviation of X is c The parameter of the exponential distribution of X is What is the probability that X is less than 4 16. C) C) C) C) 0.2212 0.7981 0.3935 0.5034

Data on the heights (inches) of brothers and their sisters were collected. The scatterplot and regression line for estimating heights of sisters from their brothers is given below

A test was given to a group of students. The grades and gender are summarized below A B C Total Male 4 19 16 39 Female 9 6 10 25 Total 13 25 26 64 If one student is chosen at random from those who took the test, Find the probability that the student was male GIVEN they got a 'B

Differentiate each function with respect to x. 1) y= ~x' - 5x + 2x 4 2 ) f ( x ) = - - x2 + 4x -' _ 3) y= (x5 + 3)(4x4 + 1) 4) f(x) = (3x3 - 1)(3x3 + 1) 5) f (x) = (-x2+5)(4x4 +4) 6) y= (2x3 - 1)2 7) y= (-4x5 + 5)3 8) y= (2x3 + 1)3 9) v-5x + 4 4x *+ 4x2 5x5 - 5 10) y = 3x5 + 3 11) y = cos 5x3 12) y = cos 2x2

Question 8 Describe how the function f(x) = (x + 1)2 4- ean be graphed using the graph of y = 12 and a sequence of transformations

Considerf(x)=4cos(x/3).What is(601)?Use decimal notation in your answer. (Hint:What is the period off? )

Determine the interest rate r needed for an investment to quadruple in value in 12 years if interest is compounded continuously. Exact value of r = -In(1.2527) X Interest rate, as a percent, rounded to 2 decimal places = 17.896 X

QUESTION 7 Shifting to another problem context, solve the following problem, and don't forget to round appropriately. A food scientist at Healthy Habits magazine is tasked by the magazine's editor-in-chief to estimate the mean number of between-meal snacks that Americans eat weekly. What is the minimum size of the sample she should collect if the

The means are all different so reject the null hypothesis. The next 2 questions use the same data. Question 7 (1 point) A random sample of 100 credit sales in a department store showed an average sale of $120.00. From past data, it is known that the standard deviation of the population is $45.00. What is the standard error of the mean? 4.5 0.45

Using the following stem & leaf plot, find the five number summary for the data by hand. 1159 21018 3101 41 3 46 512568 8 615 5 Min = 9 Q1 = Med = Q3 = Max = 8This data is from a sample. Calculate the mean, standard deviation, and coefficient of variation. Please show the following answers to 2 decimal places. =D Standard Deviation = [j

need assistance to understand i got this wrong A certain parking lot has three entrances. 40% ofdrivers use entrance 1 {A1}, 35% use entrance 2 [A2]. and 25% use entrance 3 {A3}. Of those drivers using entrance 1, 30% park for more than two hours {event B]. Of those drivers using entrance 2, 60% park for more than two hours, whereas of those using

The volume of a cube is decreasing at the rate of 2cu ft/min. What is the rate of change of an edge when the edges are 20 ft

Please please. Please sir answer After you have completed the learning materials, write your own response to the following: A researcher says that the population they want to sample is people living on the Cayman Islands. What would be a real sample to try to get at part of this population? What ways should the sample be limited? Would sitting in

An IQ test is designed so that the mean is 100 and the standard deviation is 19 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 90% confidence that the sample mean is within 5 IQ points of the true mean. Assume that o = 19 and determine the

The equality lines for the following maximization linear programming problem are shown in the graph below: Max 14x + 14y s. t. 30x + 15y

Same question n=80, xbar=85.3, (summation minus xbar)2=2508.8, Ho:mean=86.2, H1:mean <86, with signing level 10%

Could someone please check my work For each of The following, prove or give a counterexample. 1. If ( s ) converges to s, is it True That ( 1 Sal ) converges to / s/ ? Yes . Ler E DO. Since ( Sn) - 5, INEIN S. T. VnON, Isn-s/ ( 1( - 1) " 1) = ( 1 , 1 , 1 , ... ) - 1 ( ( - 1) " ) = ( - 1 , 1 , - 1 , 1 ,...) diverges First show this ([ Sal ) that is

I need solve this assignment Instructions for choosing your personally assigned values for Assessment 2 For Question 1 you will need your personally assigned Table Q1 t Table Q1 Number of Blemishes 0 2 3 5 (X) Probability f(x) 0.23 0.31 0.15 0.17 0.05 0.09 Page | 2 Question 1: Discrete random variables and distributions [50 points] The finishing

Evening Morning No, remembered less than 60% of 19 28 the items Yes, remembered at least 60% of 11 26 the items Evening Morning No, remembered less than 60% of 0.6333333 0.5185185 the items Yes, remembered at least 60% of 0.3666667 0.4814815 the items 2. (2 points) Based on the proportions In #1, does It appear that the proportion remembering at

The population of a herd of deer is represented by the function A(t} = 180(1.31)t, where t is given in years. To the nearest whole number, What will the herd population be after 5 years? The herd population will be Number

The following contingency table summarizes the drug test results for 433 test-takers: Positive Negative Total Doesn't use drugs 4 186 Uses drugs 231 12 Total For a randomly selected test administration, find the following probabilities. (Round the answers to 4 decimal places.) 1) The probability that the test-taker doesn't use drugs: 2) The

1. Find y' for each of the following. Algebraic simplification is not needed. a) y = sec?(ex) + e-2x b) y = In(x2 + Inx) C ) y = sin-1(x3) - tan-1(x3) d) y = et . 102t dt x2 e ) (3x - 5)10 (2x + 3)-3 y= tan2 x 2. Let f (x) = ex + tan 1x + 1- 1. a ) Show that f (x) is one-to-one, hence has an inverse, f-1(x). b) Find (f-1)'(It)

11. Consider the curve defined as r(t) = (+3/2 - 2) i + 4j + (+3/2 + 1) k, out Determine the point on the curve that is 8v2 units from the point P(-2, 4, 1) as measured along the curve

9 8 (3 marks): Assuming a diagnostic test with Sensitivity 80%, Specificity 60%, calculate two positive predictive values, with 21% prevalence and then with 31% prevalence assuming a total number of 4500 people who were screened. Tip: First draw and label TWO 2x2 tables (you will need two tables, one with 21%prevalence and one with 31% prevalence

multiple choice questions 1-5, thanks Question 1 (1 point) Let 2 be a standard normal random variable. What is the probability that the absolute value of z is at least 1.66? O a) 0.1212 O b) 0.0970 O c) 0.0614 Q d) 0.1470 C) e] 0.0784 Question 2 (1 point) Consider the following population probabilities x -432101234 plx) .02 .07 .10.15 .30 .18 .10

Reciprocal function: f (x) = - Odd cube polynomial function f (x) = x' X X f (x) =x X f ( x) = _ -2 -1 Domain: Range Domain: Range

The Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 124 people reveals the mean yearly consumption to be 38 kg. Assume a normal population with the population standard deviation of 5.8 kg. Find the margin of error with the 95% level of confidence for the population mean. (Round the answer to two decimal

A really cool ice cream store owner developed a model to relate to his ice cream shop sales (Y) to the amount of advertising dollars he spent (X1) to the number of extra smiling faces he put on staff for the day (X2) to the degrees in average daily temperature above 70 degrees (X3) ((At 70 degrees X3=)(at 70 degrees X3=0 ) The multiple regression

FORMULAS YOU MAY NEED: Repeated-measures ANOVA Between-subjects ANOVA SS Between =_ (T-) - G-/N SS Total =EX- - (G/N) SS Within = _ SS = SS1 + SS2 + SS3 SS Within = _ SS = SS1 + SS2 + SS3 SS Subjects = _ (P-/k) - G-/N SS Between =_ (T-) - G /N SS Error = SSwithin - SSSubjects SS Total =EX- - (G-/N) df total = N - 1 df between = k - 1 df between =

a. Sketch a graph of lim x->3 f(x)=2 but f(x) is not a continuous function at x=3.b. Sketch a graph of lim x->3 f(x)=2 but f(3) does not exist.c. Sketch a graph of lim x->3 f(x)=2 does not exist but f(3)=5. al Setaa graph of el Stal - 3 but thi s not a contmeans function at * - Blear All Draws Line Dot Open Dot bj Sketch a graph of lim. / (=) = 2

6. a) A poll by the Pew Research Centre found that 23% of Americans do not have high-speed broadband internet at home. If an American is selected at random and asked to roll a regular die, what is the probability the American does not have high-speed internet at home and rolls a 3 on the die? P(no internet and roll 3). Round to 3 significant

Use the given minimum and maximum data entries, and the number of classes, to find the class width, the lower class limits, and the upper class limits. minimum=12, maximum=58, 6 classes The class width is ? Choose the correct lower class limits below. A. 12,20,28,36,44,52 B. 20,27,36,44,52,59 C. 19,27,36,43,51,59 D. 12,19,28,35,43,52 Part 3 Choose

A traffic safety company publishes reports about motorcycle fatalities and helmet use. In the first accompanying data table, the distribution shows the proportion of fatales by location of injury formotorcycle accidents. The second data table shows the location of injury and fatalities for 2052 riders not weanng a helmet 1) Select correct option:

1. Calculate the value of the following indefinite integral: \fdx 0 + 1\fy Xy= - - X

dx

Determine what type of variation is given by the data in the table. X y 24 2 12 3 8 4 O The table shows variation. The solution is

Compute the exact value of the function for the given x-value without using a calculator. f(x) = 3 x for x = -1

7. [0/1 Points] DETAILS PREVIOUS ANSWERS SCALC9 6.7.028. MY NOTES ASK YOUR T Prove the formulas given in this table for the derivatives of the following functions. Which of the following are proven correctly? (Select all that apply.) O ( csch(x) ) = d 1 cosh(x) 1 cosh(x) = -csch(x) coth(x) dx dx sinh(x) sinh(x) sinh(x) sinh(x) O ( sech (x) ) = - d

A local realtor wants to determine the average value for single-family houses in a community.A random sample of 50 houses is selected. The sample mean value is found to be $220,000 with a sample standard deviation of $40,000. a) Assuming that the values of all single-family houses in the community is normally distributed, compute a 90% confidence

COVID-19 deaths are underreported in different countries for different reasons, including limited capacity to test for infection, inadequate death registration systems, and inaccurate reporting due to political factors. As a result, health officials based their analysis on the concept of "excess mortality"- a measure of the difference between