Mathematics Questions and Answers October 21, 2020

You work at Barnsdall's exclusive manufacturer of Johnson rods. One of the operations at the facility requires cutting pieces of metal. The life of a cutting tool is normally distributed with a mean of 26.3 and a standard deviation of 4.7 operating hours. The cutting tools are replaced at the start of each day, and each day consists of two

Below are five examples of unit labor requirements for a foreign country (denoted with an asterisk) and a home country. There are two goods: good-1 and good-2. For each example, show which country has the comparative advantage in which good, and which country has the absolute advantage. (a) a(L1)=0.5 a(L2)=0.2 a(L1 *)=0.2 a(L2 *)=0.5 (b) a(L1)=0.5

5, Assume that the investments within an RRSP will earn 5% compounded annually. What monthly contribution must be made to the RRSP for it to grow to $750,000 in: c. 25 years? d. 30 years? In each case, also calculate the total earnings within the RRSP. (Note that the total earnings increase proportionately more than the duration of contributions)

Practice question SAMPLE/EXAMPLE: UV .. ONE WAY ANOVA TEST TWO College readiness Does the Rate of Poverty in a School Influence Keystone Math Scores? Use the attached table to get your data. Data source: http://www.paschoolperformance.org Level A1 Level A2 Level A3 Conditions k = High Poverty Medium Poverty Low Poverty X Y2 X X 2 X Y2 23.11 534.07

What does an Odds Ratio of 1.70 mean in the following statistical hypothesis study: Women below poverty will have a higher smoking rate than women living above poverty who smoke. Thank you!

1) Data was gathered from several homes for sale in Cincinnati, Ohio, in order to examine the relationship between the size of the house (measured in square feet) and the price of the house (measured in dollars).Suppose you learn the relationship between size and price is linear, positive, and strong, with r = 0.81.You also learn that a regression

what are the moments, measures of central tendency, dispersion, kurtosis, skewness, probability function, distribution function, graph, and properties of various types of discrete probability distributions and various types of continuous probability distribution?

3. In general what is the relationship between standard deviation and variance? a. They are not related at all. c. Standard deviation is the square of variance b. Variance is the smaller one d. Variance is the square of standard deviation 4. Alpha level is known as

A simple random sample from a population with a normal distribution of 107 body temperatures has x=98.50F and s=0.61F. Construct a 98% confidence interval estimate of the standard deviation of body temperature of all healthy humans? __________F <

Hi I need help with the answers step by step and clear please 3. (3 points) Find the limit, if it exists. Show your work. x2 - 9 lim x--3 2x2+ 7x +3 4. (4 points) Find the limit, if it exists. Show your work. V4x6 - x lim X- -00 x3+7

One card is selected at random from a deck of cards. Find the probability that the card selected is a spade or a card greater than 8

The mean cholesterol levels of women age 45-59 in Ghana, Nigeria, and Seychelles is 5.1 mmol/l and the standard deviation is 1.0 mmol/l (Lawes, Hoorn, Law & Rodgers, 2004). Assume the Cholesterol levels are normally distributed. Find the probability that a woman age 45-59 in Ghana has a cholesterol level above 6.2 mmol/l

13. An auto body repair shop plans its billing based on an average of 0.9 h to paint a car. The owner recently checked times for the last 50 cars painted and found that the average time for these cars was 1.2 h. She knows that the standard deviation is 0.4 h. Test the significance of this result at ( = 0.10

Determine whether each of the following is a valid probability distribution.

1. Determine whether each of the following is a valid probability distribution. o P(x) 0.1 5 1 0.3 6 2 0.4 10 3 0.1 P(x) 0.01 0.01 0.01 0.97 P(X) 025 0.46 0.04 0.24

3. The annual number of burglaries in a town rose by 50% in 2012 and fell by 10% in 2013. Hence the total number of burglaries increased by 40% over the two- year period. a. What is the mistaken assumption here? b. Why is that assumption incorrect? o. By what percent has the number of burglaries actually changed in the two-year period?_show

is assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change th Inment Scoring best submission for each question part is used for your score. /1.5 Points] DETAILS MY NO Maximizing Profits An apartment complex has 100 two-bedroom units. The monthly profit (in

Data 26 12 11 5 574 130 166 130 Dataset : bloodi . dat Source: K. L. G. Goldsmith, I.M. Lewis (1958) . "A Preliminary Investigation of the Blood Groups of the Sad Bondsmen of Northern Somaliland", Man, Vol. 58, pp. 188-190. Description: Blood types by two groups (1=Tumaal/Midgaan, 2=Somalis) . Variables/Columns : Group 1 /* 1=Tumaal/Midgaan

Define what a z-score (or z-statistic) does - why is it useful when attempting to describe one value (like a score or a sample mean) to another value (like a population mean)? What is the difference between standard deviation and standard error? How do we calculate a confidence interval? Describe the steps in the formula for calculating a

Given a sample size of 26, standard deviation of 2.9 and a sample average of 21.92 a 90% prediction interval would be between _____ and _____. a) 13.65 to 30.19 b) 15.82 to 28.02 c) 16.87 to 26.97 d) 30 to 50

15. Now the researcher (Dani) is interested in whether size of an object (x) predicts familiarity (y) with that object. This time, however, he collects ratings for a sample of 90 words, using the same methods, with the following characteristics: E(x - )2 = 300.3 E(y-y)2 = 27.8 E(x - x)(y-y) = -26.65 a. What is the correlation coefficient (r) for

Question 9 (2 points) Find the equation of the tan gent line to the curve y = 2:1: sin (:17) at the point a: = %. Oy = 2:1\": + 211' O y = 2:1: 0y = 2:1': + 271' 03;: 2:1

26 cm Copyright @2007, Durham Continuing Education Page 9 of 56 MAP4C Foundations for College Mathematics Lesson 16 Key Question #16 (continued) 3. A cone has a height of 10 cm and a volume of 350cm? What is the radius of the Cone? 4. Look at the formula forthe volume of a rectangular prism. How does the volume of a rectangular prism change in

Fill in the missing blanks on the following table: Deg. of Freedom Sum of SquaresMean Square F Regression 1 ________ 200 _______ Error (Residual) _______ ________ ________ Total 20 446.34

Buen dia me podrian ayudar con los siguientes ejercios que es con letra legible se los agradeceria de antemano saludos y gracias

We want to test if there is a difference in the number of male vs female newborns. To test our hypothesis, we pulled sex information of newborns from University of Iowa Hospitals and Clinics' electronic medical records. From July 1st, 2018, to Sept 30th, 2018, 400 babies were born and 215 of them were males and 185 of them were females. Assume

Using exact values show a numerical verification for 0 . (1 mark)

Use the properties of logarithms to write the expression as a single term. sin In sin 0 - In U

There are 12 people in an office with 3 different phone lines. If all the lines begin to ring at once, how many groups of 3 people can answer these lines?

Find Quartile 1, 3 and the Median for the following data sets. Round to 2 decimal places (if applicable) 123, 234, 345, 456, 567, 678, 213, 789, 891, 912, 213, 559

Given: y = abux u is best called a growth/decay: Q factor Q constant 0 rate 0 any of these

For part A please be clear on which element corresponds with which 2?3?4?5?6?7? V X +2 Z - Z: f ( x) = 2 v 3 3 A. Select the element in f(x) that corresponds to B. Select the properties that describe f(x) V the circled x. onto not onto V 2 -2 one-to-one not one-to-one 6 30 0-1 X 40 .0 f ( x ) 50 .1 . 2 70 .3 . . Undo

5. In an Indiana survey, 5400 people in rural communities were randomly selected. Approximately 68% of people in rural communities give their diet a high rating. a. Find the 99% confidence interval estimating the proportion of people in rural communities who give their diet a high rating. Round answers to three significant digits. Z-Value:

A pharmaceutical manufacturer purchases a particular material from two different suppliers. The mean level of impurities in the raw material is approximately the same for both suppliers, but the manufacturer is concerned about the variability of the impurities from shipment to shipment. If the level of impurities tends to vary excessively for one

please show whole problem Question 13 0/2 pts 3 23 0 Details Find a unit normal vector to the surface f(r, y) = * at the point P( - 1, 1, - 1). Write your answer in ijk-form and in exact form. There is no need to place the arrow above the ijk- vectors. Enter i for i, j for j and & for k

For a sample size of 30, changing from using the standard normal distribution to using the t distribution in a hypothesis test _____.

3. At what point on the curve y = * does the normal have a slope of 32 ? Paragraph BIUVA E + V . ..4. Determine the equations of the lines that are tangent to the parabola y = 1 + x and also passes through the point (0, 0). Paragraph v B I U A/ 11

Based on the outline you created in Written Assignment 2, deliver an informative speech via webcam video using research, organization, and outline skills. This speech is not a manuscript speech, meaning that you are not to write it out word for word. However, you may have notes on cards, which will help you keep order and stay on track

Help me answer the given question ASAP. No need for the solution as long as the final answer is correct. Help me find the forces in members BD, CD and CE in pounds. A Fink truss is loaded as shown, calculate the forces in members BD, CD and CE. Assuming the members are pin connected and span to be 15ft. 1000lb 1000lb 1000lb BV VVF A 300 600 600

Section B please Recall that The equation ax + by + cz = 0 describes a plane in R3 that passes through the origin. The curve C in R3 is parameterized by r (t) = (-6 sin(2t), 8 sin(2t), 10 cos(2t)) for 0 S t S . B. [10 pts] Find specific values for a, b, and c - not all of which are 0 - so the curve traced out by r (t) lies on the plane ax + by +

l7. Quit smoking: In a survey of 444 HIV-positive smokers, 170 reported that they had used a nicotine patch to try to quit smoking. Can you conclude that less than half of HIV-positive smokers have used a nicotine patch? Use the a = 0.05 level of significance. Source: American Journal of Health Behavior 32:315 24. Cable TV choices: A

3. Given a = (-1,2,-3) , b = 27 - ] + k , and c = i + / do the required operations: a) 2a -b + 3c b) 3(a + 2b) -2(a -c)

Describe the bin size and skewness of the histogram. (Explanation) 25,000 45,000 65,000 85.000

16 14 12 10 KS(IOO

In a game, you have 1/33 probability of winning $121.00 and a 32/33 probability of loosing $7.00. What is your expected value

The Minnesota Twins are to play a series of 5 games in Boston against the Red Sox. For any one game it is estimated that the probability of a Twins' win is 0.5. The outcomes of the 5 games are independent of one another. Find the expected number of games and variance that the Twins will win.

(CO 3) Consider the following table: Defects in batch Probability 0.04 0. 11 0.25 CO 0.20 0. 19 0.21 LO Find the variance of this variable. 1.44 2.08 141 3.02

2. Se ha realizado un estudio estadistico sobre el peso en kg y eI sexo de IOS recin nacidos durante seis meses en un hospital. El peso de 16 de ellos es 3.215 3.315 2.987 2.853 3.054 2.900 3.115 2.799 2.869 3.008 3.106 3.115 2.873 2.875 3.108 3.203 Adems, 7 de esos bebs son nios (hombres). Determina un estimador puntual Para a) El peso medio de

1928 43.81116 1929 -8.29795 1930 -25.12364 1931 -43.83755 1932 -8.64236 1933 49.98223 1934 -1.18857 1935 46.74042 1936 31.94341 1937 -35.33673 1938 29.28265 1939 -1.09756 1940 -10.67287 1941 -12.77146 1942 19.17376 1943 25.06131 1944 19.03068 1945 35.82108 1946 -8.42915 1947 5.20000 1948 5.70458 1949 18.30322 1950 30.80554 1951 23.67846 1952

3-[12] For the following, evaluate the limit if it exists. If it does not exist, explain why. If the limit is infinite, determine whether it is co or -co. x3 + 2x2 x - 1 (i) lim (ii) lim x--2x2+x- 2 x--2+ x2(x +2) x2 +7 -4 (iii) sin(x - 1) lim x2 - 3x (iv) lim X+3 x-1x2 + 2x -3

For the games on this page, find all pure-strategy Subgame Perfect equilibria. 6.4 R LL R W( 6.2 y (# ) =(*) 2,6 4, 4 2,2 8,8 0, 0 6.5 N . . .... . . . . B A B 6, 1 1, 6 e 3, 3 0,0 0,3 3,0

The main purpose of random selection is to a. make it easier to obtain a statistically significant result b. help the experimenter figure out what caused the observed behavior c. ensure that your sample accurately represents the population d. decrease the probability of a Type I error 2. A researcher thinks that their growth treatment will help

16. [-/5 Points] DETAILS MY NOTES The sales of a math performance enhancing drug are given by S(t) = /20t + 1 12+ 8 -where t is in years and S(t) is in millions of dollars. What is the rate of change of sales in millions of dollars per year when t = 0? 85 110 95 90 80

The article "Oxytocin-gaze positive loop and the coevolution of human-dog bonds" (Nagasawa et al., 2015) describes a study in which oxytocin levels (in picograms per milligram, pg/mg) are measured in 22 dog owners before and after a 30-minute interaction with their dogs. (Oxytocin is a hormone known to play a role in parent-child bonding and is

Consider the model y = Pp + By*, + B2Xz + Pag + E, where x, is a quantitative variable and x2 and x? are dummy variables describing a qualitative variable at three levels using the coding scheme xy = 1 if level 2 and xy = 1 if level 3 Q otherwise 0 otherwise The resulting least squares prediction equation is y = 47.5 + 2.5x, + 8.5x, + 16.8%3 -

7) The weight (in pounds) and amps for 19 circular saws was collected. Saws with higher amp ratings tend to also be heavier than saws with lower amp ratings. This fact was quantified using regression with the following output: SUMMARY OUTPUT Regression Statistics Multiple R 0.6761 R Square 0.4571 Adjusted R Square 0.4252 Standard Error 0.7822

A researcher wishes to conduct a study of the color preferences of new car buyers. Suppose that 40% of this population prefers the color red. If 14 buyers are randomly selected, what is the probability that exactly a half of the buyers would prefer red? Round your answer to four decimal places.

Let Y have pdf given by fy(y) = 2(1 -y) for 0

Let Y have pdf given by fy(y) 2(1 y) for O y 1. (a) Find the density of Ul 2Y 1. (b) Find the density of 1 2Y. (c) Find the density of (J 2Y3.

Assuming that drag is proportional to the square of velocity, we can model the velocity of a falling object like a parachutist with the following differential equation: du Cd g dt = m where v is velocity (m/s), f = time (s), g is the acceleration due to gravity (9.81 m/s-), ca = a second-order drag coefficient (kg/m), and m = mass (kg). Solve for

An object is suspended by two cables attached at a single point. The force applied on one cable has a magnitude of 125 pounds and acts at an angle of 37. The force on the other cable is 75 pounds at an angle of 150. Part A: Write each vector in component form. Show all necessary work. (4 points) Part B: Find the dot product of the vectors. Show

3. [5 points each] Calculate the following derivatives. Show all your steps and simplify your answer. a) f(x) : log2 (V 12x2) f'(X)= 919): c) H(t)=ln(t+) H'(t)=

Could I get help answering these 4 questions? Write the correct function for each graph with the given hints for a, b, c, or d. 3. y = asin x + d 4. y = a cos x + d lul owd obubal and Housale 5. y = sin (x - c) 6. y = cos (x - c) 7. y = sin b . x 8. y = cos b . x

Rainfall / Runoff Exceedance Frequency . .. Rainfall Runoff 100.0 10.0 Days per Year Exceeded 1.0 01 G 10 12 14 Depth (inches)

Question 1 1 pts 7k Let ak = Which of the following inequalities is/are true for any positive integer k ? k2 + | sink Select all that apply. ak > 7k 12 + 1 7k K2 + 1 0 0

If you drop a ball onto a surface from a height of 1 meter and the ball rebounds to a height of 61 centimeters, what is the coefficient of elasticity for the ball

QUESTION 4 Continuing with the same question, what decision would a pessimistic person make? State of Nature Decision 51 $2 $3 d2 14 15 2 d3 7 8 9 a.d1 b.d2 C. d3

We toss a boulder into the air (we are very strong and, perhaps, careless). Its initial velocity is 15 meters per second, and its position is s(t) = 15t 4.9t2 meters off the ground after t seconds. A) What is the boulder's average velocity from 2 to 3 seconds? B) What is the boulder's average velocity from 2.5 to 3 seconds?

14. A diver does a swan dive horn a platform 20 ft above the water. The path fol lowed by the feet of the diver can be approximated by a parabola as shown in the gure. 3) Find the quadratic equation that gives a mathematical description of the dive. ' b) How far from the point directly below the takeoff point will the diver'5 feet enter the water?

(4) (12 marks) Find the given limits: (a) lim Vex + 4x 4x + 2(3) (b) lim resin(7 /x) x-0+ a2 + 2x - 3 (c) lim x--3+ a + 3 (d) lim tan -1

If given an extremely non-normal empirical frequency distribution, does it make sense for a researcher to find the percentile rank using the z score and the standard normal distribution table? Why or why not? Describe two distributions (other than normal) that a researcher might encounter in data and when.

1. Identifying H0 and H a from Triola. First identify if the given statement is a statement about the null or alternative hypothesis. Then write out the hypotheses. a) More than 25% of Internet users pay bills online. b) Most households have telephones c) The mean weight of women who won Miss America titles is equal to 121 1b. (1) The percentage

Kutipan cukai hartanah bagi pembayar cukai di sebuah bandar adalah bertaburan normal dengan nilai min RM2,800 dan sisihan piawai RM400. Jika 10% pembayar cukai membayar jumlah cukai yang tinggi iaitu RMX. Dapatkan nilai tersebut? (tuliskan jawapan numerik sahaja tanpa unit dan koma; contoh: 1500)

Find all points where the function whose graph is shown below does not have a derivative. The point(s) where the function does not have a derivative is/are x = (Use a comma to separate answers as needed.) 13 X

A company estimates that 8% of their products will feel after the original warranty period but within two years of the purchase, with a replacement cost of $500. If they want to offer a 2 year extended warranty, what price should they charge so they'll break even (in other words, so the expected value will be 0)

A trade magazine routinely checks the drive-through service times of fast-food restaurants. A 90% confidence interval that results from examining 701 customers in one fast-food chain's drive-through has a lower bound of 176.5 seconds and an upper bound of 180.1 seconds. What does this mean? Choose the correct answer below. A. One can be %

In a certain city, the average 20- to 29-year old man is 69.6 inches tall, with a standard deviation of 3.2 inches, while the average 20- to 29-year old woman is 64.1 inches tall, with a standard Question list K deviation of 3.8 inches. Who is relatively taller, a 75-inch man or a 70-inch woman? O Question 1 Find the corresponding z-scores. Who is

Place your single nal regression model here (and answer questions below): You will likely need to create additional worksheets as you develop your regression model, but place Make sure your additional sheets are labeled and ordered so that your model development is clear

1. Using the given graph (on the next page) manually count the length of the legs of the triangle, then substitute them into the Pythagorean Theorem and solve for the hypotenuse length. Show the substitution and write down each step and number so I can see what you did. Round your answer to the nearest tenth. (in graph three points are A(-9,18)

What causes a skewed distribution, and how might a researcher deal with skewed data?

solve a. b. and c. f (x) f(a) a. Use the definition mian = lim to find the slope of the line tangent to the graph of f at P x-a x-a b. Determine an equation of the tangent line at P c. Plot the graph of f and the tangent line at P. f( x) = x - B, P( - 4,8) a. mian

DATA Trt Calories 1 435.16 1 338.99 1 488.73 1 590.28 1 582.59 1 635.21 1 249.86 1 441.66 1 572.43 1 357.78 1 396.79 1 298.38 1 282.99 1 368.51 1 388.59 1 256.32 1 408.82 1 424.94 1 477.96 1 428.74 1 432.52 1 428.27 1 596.79 1 456.3 1 446.38 2 414.61 2 503.46 2 425.22 2 288.77 2 184 2 299.73 2 350.65 2 394.94 2 261.55 2 295.28 2 139.69 2 462.78 2

Question 6 (10 points) Listen An experiment consists of tossing a fair coin 3 times. Find the probability of getting exactly one head. O O co CO O O Co|

A researcher wants to test the relationship between the number of years of formal education received (Xi) and the average weekly earnings (Yi) (measured in hundred dollars). A report released by a government agency suggests that the average weekly earnings of individuals with no formal education is equal to $429. The researcher wants to test

Question 1 (2 points) () Listen Write the first four elements of the sequence. n +1 an 3n - 1, n =0, 1, 2, .. . 3 1 5 (A 1, , 21 11 OB) 1 1 3 31 2'413 OC -1, 1, OD) 1, 1, , 3 4Question 2 (2 points) () Listen Write the first four elements of the sequence. n an = 1 n = 1, 2, ... n 9 64 O A) 1, 2, 41 9 9 64 625 ( B) 1, 1 27 1 24 9 64 625 O C 2, , 27

using the dataset from: https://data.world/govex/human-resources-training What is the city's overall vacancy rate? a. 5.3% b. 4.1% c. 2.7% d. 1.1% e. 0.5% Which Department's vacancy rate is the highest? a. Department of Public Libraries b.Department of Police c. FIre and Rescue Services d. Department of Transportation e. Ethics Commission 3. Which

Given the following summary statistics, compute the Pearson correlation to two decimal places. There are 8 pairs of scores. EX EX2 EY E Y2 EXY 43 263 48 344 273

Instructions: Write a thorough and lengthy data interpretation analysis of the table below. Include all details as much as you can, as well as all relevant explanations. Statistical Treatment: Pearson Correlation Coefficient Correlations SM CI LP SM Pearson Correlation 1 685 652 Sig. (2-tailed) 000 000 N 270 270 270 CI Pearson Correlation 685 680

Question 13 NO t yet answered xy2 dy dx out of 1.00

Name one or more graphs that can be used to validate each of the following assumptions.For each graph sketch an example where the corresponding assumption is valid and an example where the assumption is clearly invalid. a)there is a linear relationship between the response and the predictor variables. b)the observations are independent of each

Page 1 > of 2 - ZOOM + Press Esc to exit full screen Price ($) Promotional Exp ($K) Location Store Size (Sq.Ft) Sales($K) 949 5 1 5,500 168 941 3.5 1 5,200 150 934 4.8 1 5,400 168 921 3.6 1 4,750 14 915 4.3 1 5,250 152 909 4.7 1 5,000 162 904 4.5 1 6,000 160 1014 2 0 2,350 123 1006 2.9 0 3,000 130 990 1.2 0 2,400 116 978 3 1 5,200 142 962 3.2 1

2 Find the exact value of sin 2 Write your answer in radians in terms of It. 2 sin OVO 2 X

Convert the radian measure to degree measure. . Use a calculator to verify your result. 7Pi / 9 = ??? degrees?

The breaking strengths of cables produced by a certain manufacturer have historically had a mean of 1950 pounds and a standard deviation of 80 pounds. The company believes that, due to an improvement in the manufacturing process, the mean breaking strength, p, of the cables is now greater than 1950 pounds. To see if this is the case, 27 newly

A publisher's magazine sales, S, reach 250 000 in 2004 and increase exponentially to 300 000 in 2008. If t is the number of years from 2004 then, in 2006, sales (to the nearest whole number) were increasing at a rate of type your answer... magazines per year. (Hint: refer to lecture R4 for the exponential model)

PART 1 A. Prepare a frequency and relative frequency distribution for your qualitative date V1 in the format noted below. Qualitative Categories Frequency, f Relative frequency, rf B. Prepare a Pareto chart for your data. C. Write a one-sentence explanation about what these charts tell you about your data and whether you expected this result. PART

Question 3 Solve the given differential equation by using Green's function. y" - 4y = e 2X, y (0) = 0, y' ( 0 ) = 0 Hint: Use the following formula. VI (D Y 2 ( x ) -1 1 ( 1 ) ) 2 (1) G (x, t ) =- W ( t) Y = / G(x, of (1)dt Oy(x) = 1xe 2X_ _ e3x+ 1 e -3x Oy = 1xe 2X- - 3X + + e-4x Oy( = 1xe 2X- Le2X+ Le -2x O y( = 1 xe 2X. 1 e 5x + 1 8-2x

1. (06.04 MC) 1 A particle is traveling at a certain velocity modeled by V\"): f where t is measured in seconds and v is measured in inches per second. How far does the particle travel for 1 5 ts 3'? (10 points) 2. (06.07 MC) Which is an antiderivative of tan(x)sec(x)? (10 points) O No antiderivative exists 0 sec(x) - 2 O tan(x) + 6 O csc(x) 3.

Remaining Time: 1 hour, 57 minutes, 44 seconds. Question Completion Status: QUESTION 28 In order to make an inference about the average time SHSU students check their emails, a sample of 10 students was surveyed for how many times a day they check their emails, the sample mean is 20 times with the sample standard deviation 5 times. A sample of 20

A population has parameters u = 137.5 and o = 22.9. You intend to draw a random sample of size n = 215. What is the mean of the distribution of sample means? HI = What is the standard deviation of the distribution of sample means? (Report answer accurate to 2 decimal places.) Of =

Find the intercepts for 4x+5y=40 (Show Work Please :) )

According to a study, 79% of K-12 schools or districts in a country use digital content such as ebooks, audio books, and digital textbooks. Of these 79%, 3 out of 10 use digital content as part of their curriculum. Find the probability that a randomly selected school or district uses digital content and uses it as part of their curriculum. . . .

(1 point) Let f(x) be the function whose graph is shown below. Determine f' (a ) for a = 1, 2, 4, 7. f' (1) = f' (2) = f' ( 4 ) = f' (7 ) =