S
  1. study help
  2. subject categories
  3. sciences
  4. mathematics
  5. july 2022
  6. 09

Mathematics Questions and Answers July 09, 2022

Expert-verified solutions to help you succeed

There are 50 reports to be read. Ten are to be chosen for today's work. (a)How many different possibilities are there for choosing the reports? (b)If 5 of the 50 reports are important, what is the probability that at least 1 important report is read? (c)What is the probability of no more than 1 important report to be read? (d)Using the previous

Please see photos and calculate each screen shots 3. The least-squares principle Let us return to the sociologist interested in youth culture. He is conducting research on Facebook. To determine how many Facebook friends students have, he obtains a sample of nine students. Students are asked how many Facebook friends they have. Their responses are
image text in transcribedimage text in transcribedimage text in transcribed

Use the graph of f to estimate the local maximum and local minimum. LOOK AT COMMENT SECTION FOR PICTURE THAT IS FOR THIS QUESTION No local maximum; local minimum: approx. (1,-7.67) Local maximum: (-2,8); local minima: (-3,0) and (3,3) Local maximum: approx. (1,8.08); local minima: approx. (-2,-7.67) and (3,2.75) Local maximum: local minima: (-3,0)

The average score on an IQ test approximately fits a standard normal curve with a mean of 100 and a standard deviation of 15.Find the percent of people who would have an IQ greater than 115.

Shane finds a cheap flight deal if he waits for an average of 25 minutes and then checks flight prices on the computer. This is an example of a: Group of answer choices Variable interval schedule Variable ratio schedule Fixed interval schedule Fixed ratio schedule

I'm not sure how to get this solution, I believe it has something to do with the chain rule but I can't figure it out l. Let z=f(x,y], wherex =g{u, 1r] andy = My, 1:]. Then 2 =f(3(u, 1:], My, v3] = FIH, v} is a mctic-n of u and v. Suppose the following values are know: 1\"\": 2}=3,fx{1, 2F Safla 3}=1; 3(3: 5) = l! 343: 5) = 2! 31131 5} = _1; M3:
image text in transcribed

Suppose that E and F are two events and that N (E and F) = 400 and N(E) = 510. What is P (F | E)?

Need help with this exercise Exercise 2. Draw solution curves based on the following direction field, for a variety of different values of y(0). 4 3 2 - > -2 -3 A -4 -2 0 2 6
image text in transcribed

The conditional mean of Y for any value of X is found by A.adding the Y scores for the specific value of X and dividing by N. B.adding all the Y scores and dividing by X. C.subtracting the mean of Y from the overall mean of X. D.any of these

At a local store, 65 female employees were randomly selected and it was found that their mean monthly income was $625 with a standard deviation of $121.50. Seventy-five male employees were also randomly selected and their mean monthly income was found to be $667 with a standard deviation of $168.70. Test the hypothesis that male employees have a

Review the following statements and select the one which is true regarding an ordinary annuity. Multiple choice question. An ordinary annuity is the future value of a single sum of $1 invested for a defined number of periods at a defined interest rate. An ordinary annuity is is the present value of an investment for a specified number of periods

Please answer all four multiple choice questions below, questions 1a, 1b, 1c, and 1d. Please show all work and all steps. 1a.) Let X + Y be the sum of the above random variables X and Y. Find the mgf of X + Y. a) Mx + My b) e^2t 1b.) For a distribution function F, we have that F(x) geometrically represents: a) the area under the graph of the

A random sample ofn 1 n1 = 262 people who live in a city were selected and 112 identified as a "dog person."A random sample ofn 2 n2 = 97 peoplewho live in a rural area were selected and 55 identified as a "dog person." Find the 99% confidence interval for the difference in the proportion of people that live in a city who identify as a "dog

5: 25 The number of hours that the employees at the grocery store worked last week is normally distributed with a mean of 24 and a standard deviation of 6. If there are 60 total employees, approximately how many worked at least 30 hours last week? 30 hours 10 employees

Francine's new puppy weighed 3.3 pounds when she brought it home, and it should gain approximately 0.6 pound per week. Estimate how long it will take for the puppy to reach 15.3 pounds

A 90 % confidence interval for the mean height of a population is 65.7 < <67.3. This result is based on a sample si ze of 169 adults. Construct a 95 % confidence interval.

In a particular municipality, it is believed that 25 percent of homes are not properly insulated. In order to testH0:p=.25vs.HA:p.25 (wherep is the population proportion of homes that are not properly insulated) a random sample of 300 homes was selected. In the sample, it was found that 105 homes were not properly insulated. If the null hypothesis

In the book Advanced Managerial Accounting , Robert P. Magee discusses monitoring cost variances. A cost variance is the difference between a budgeted cost and an actual cost. Magee describes the following situation: Michael Bitner has responsibility for control of two manufacturing processes. Every week he receives a cost variance report for each

A researcher sprayeda random sample of 100butterflies with a particular method and observed their survival times. The mean and standard deviation were foundto be 18.3 and 5.2 days, respectively. Use these information to construct a 99%confidence intervalfor the true mean survival time. What is the lower bound of this confidence interval? ( Answer

(Revision 15) (4 points) 9. Let f(x)=3x" +x -2 a. Find an interval where the function /" has one root. b. Use Rolle's theorem to show that the function / has exactly one root. Hint. See Example 2 on page 283 of the textbook. (4 points) 10. Use the identity cos x + sin\" x = | to integrate Icos3x sin\" x dx. (12 points) 1 1. Evaluate each of the
image text in transcribedimage text in transcribed

An important part of any dispensing process is statistical quality control.At the Billy Goat Gruff Inn, machines are set to dispense 600 ml of soda into every customer's glass.Over time, however, the machine can get "out of control" and dispense too much soda or too little.The machine needs adjustment if the mean amount dispensed is different than

How many student loan payments do you need to miss to send your Credit Score from Excellent all the way down to Poor

Select one expression so that a/b x c/d can be simplified to x+2/x-5

Hours 7.0 7.1 7.6 6.1 8.7 5.9 5.9 8.3 7.7 5.8 5.6 7.0 7.4 6.9 6.9 7.2 7.2 7.0 6.6 6.9 8.0 7.9 7.9 6.1 6.5 7.3 6.1 7.6 5.9 7.5 7.3 7.6 5.9 7.6 6.9 5.7 7.4 7.0 8.5 8.8 5.9 5.9 7.2 8.4 7.1 6.4 7.5 7.8 6.9 8.1 8.7 7.3 6.9 7.6 7.2 7.9 6.8 8.0 7.0 7.4 7.7 7.6 8.5 6.3 7.4 8.3 7.6 6.1 7.5 7.3 7.7 7.3 7.8 7.3 7.4 8.7 6.7 5.7 7.7 6.9 6.5 7.1 7.0 6.9 8.5 8.4
image text in transcribed

A multiple-choice test is given with 6 choices (only one is correct) for each of 10 questions. What is the probability of passing the test with a grade of 80% or better just by guessing? Question content area bottom Part 1 What is the probability of interest for the given situation? Select the correct choice below and fill in the answer box to

The following is based on information from The Wolf in the Southwest: The Making of an Endangered Species , by David E. Brown (University of Arizona Press). Before 1918, the proportion of female wolves in the general population of all southwestern wolves was about 50%. However, after 1918, southwestern cattle ranchers began a widespread effort to

Before making a final decision on the production quantity, management wants an analysis of a more aggressive 70,000-unit production quantity and a more conservative 50,000-unit production quantity. Run your simulation with these two production quantities. What is the average profit associated with each? Round your answer in whole dollar. When

Just want to check my answers with a tutors, the DE don't need to be solved as per questions Exercise 1. Find the integrating factors for the following differential equations (you do not need to solve the differential equations, only to make them exact): (a) xy dx - - dy = 0 y (b) (y + x) dx + dy = 0
image text in transcribed

I need some help with this question. It deals with model misspecification. Any help would be appreciated, thanks. \f
image text in transcribed

When is the median approximately equal to the mean? When the data are skewed When the data are symmetrically distributed When there is an even number of data points When there are outliers

High Fructose Corn Syrup Consumption A consumer group claims that the mean annual consumption of high fructose corn syrup by a person in the United States is pounds. A random sample of 120 people in the United States has a mean annual high fructose corn syrup consumption of 49.5 pounds. Assume the population standard deviation is 3.6 pounds. At

N Mean Std. Deviation Weight in Pounds 200 191.9105 14.5654 Which sentence properly reports these results in APA format? Group of answer choices Data were collected from 200 people. Their average weight was M = 191.91. Data were collected from 200 people. Their average weight was (M = 191.9105 , SD = 14.5654). Data were collected from 200 people.

Here we investigate whether the register balance at a local retail store is better on days with a manager than days without a manager. This evidence might be used to determine whether or not you should always schedule a manager. The table gives the register balance for a sample of 10 days with a manager and 10 days without a manager. Here, 0 means

Unstable particles are emitted from a source and decay at a distance X, which is exponentially distributed with unknown parameter (J. A special device is used to detect the first n decay events that occur in the interval [ml , m2j . Suppose that these events are recorded at distances X = (XI , ... , Xn). Problem 5. Unstable particles are emitted
image text in transcribed

Please Help!! Not sure why I got those questions wrong Date for question: https://docs.google.com/spreadsheets/d/1Utkck9K9o5d3hg02DZjQ1RE4pH6Zel9JBDUvoGhMVjI/edit?usp=sharing Part A) options: For the first 3 drop downs: (Remains the same, Increase Sharply, Decreases Sharply.) Last drop down: (2nd order polynomial, 3rd order polynomial, 4th order
image text in transcribedimage text in transcribedimage text in transcribed

a)What is the equation of the tangent to f(x) = 3x^2 +2x -14, where the slope of the tangent is 4? b)use first principles to find the derivatives of the following functions. Confirm your work by using the derivative shortcuts. 1.f(x) = 3x^2 +2x -14

The area of a region under a curve is greater than the area of an inscribed rectangle and less than the area of a circumscribed rectangle. Intuitively, we understand that somewhere "between" the inscribed and circumscribed rectangles there is a rectangle whose area is precisely equal to the area of the region under the curve: The efficiency ? e ?
image text in transcribed

hw help, I keep getting one wrong! Refer to the following table: (Round the final answers to 2 decimal places.) Second First Event Event A1 A2 A3 Total B1 2 1 2 5 B2 3 9 Total 14 a. Determine P(A1). P(A1 ) = b. Determine P(B1lA2). P(B1IA2) = c. Determine P(B2 and A3). P(B2 and A3) =
image text in transcribed

(b) Find point estimates of all the model parameters in your answer to part (a)
image text in transcribed

The President of UTA has been told that the proportion of Statistics students who drop BUSA 3321 nationwide is at least o (shown on right).He wants to prove statistically that the proportion of our UTA students that drop 3321 is actually less that o [ the result of the great 3321 professors at UTA ].Given the information on the right, calculate

In an axial flow jet engine, a single stage of compression consists of a row of _________ blades, and a row of___________blades. Group of answer choices Stationary stators and stationary rotors. Stationary and rotating blades, or stators and rotors. Rotating stators and rotating blades

This extreme value problem has a solution with both a maximum value and a minimum value. Use Lagrange multipliers to find the extreme values of the function subject to the given constraint. f ( x , y , z ) = x 2 + y 2 + z 2 ; x 4 + y 4 + z 4 =13 maximum value minimum value

Classify the variable below as qualitative, discrete, or continuous. Number of online purchases made in a month

A random sample of 130 purchases from a particular pharmacy was taken. The type of item purchased was recorded, and a table of the data was created. Item Purchased Health & Medicine Beauty Household Grocery Number of Purchases 55 23 22 30 Which graphical representation would be best to display the data? Box plot Histogram Stem-and-leaf plot Bar

Which sentence correctly uses a comma and coordinating conjunction to correct the fused sentence below? We were planning to hold our Tuesday study group in the library no study spaces were available. Multiple choice question. We were planning to hold our Tuesday study group in the library, when, no study spaces were available. We were planning to

7.7. Generalizing the scenario of Exercises 7.4-7.6, suppose that a drug is adminis- tered at rate A per hour for T hours, and that it is broken down in the body at rate r, usually measured in percent per hour. Write down an integral involving A, T and r that gives the drug titer at the end of the period

In ANOVA, if the null hypothesis is false, what will be a good estimate of the population variance? Group of answer choices numerator of the F ratio denominator of the F ratio numerator of the F ratio and denominator of the F ratio none of these answers

In a unimodal, symmetrical distribution a.) the mean is the same as the median, but the mode can be different. b.) the mean, the median, and the mode are the same .c.) the median and the mode are the same, but the mean can be different .d.) the mean, the median, and the mode are different.

A sample of shoppers at a mall was asked to rate the availability of parking at the mall as: excellent, good, fair, or poor. The data type is ___________ and measured at _____________ Question 39 options: a) categorical, nominal scale b) categorical, ratio scale c) categorical, ordinal scale d) numerical, interval scale e) None of the above

1.Explain any problems likely to cause confounding and suggest how they could be avoided: in a comparison of gasoline with different octane ratings, 24 vans are driven with 87 octane gasoline, and 28 SUVs are driven with 91 octane gasoline. After each vehicle has been driven for 250 miles, the amount of gasoline consumed is measured.

Writea null and alternative hypothesis for single sample that tests the idea that the population proportion equals0.25.Draw a sampling distribution which indicates the regions of rejection.

Use the function values for f and g shown in the table below to evaluate the expression. f(g(4))
image text in transcribed

Want to check my answer to a tutors thank you Exercise 4. Does a solution of the differential equation dy 2 - +t , y (0 ) = yo dt t. exist near t = 0, when (a) yo = -1, (b) yo = 0
image text in transcribed

In the figure shown, triangle MNP is an isosceles triangle with MNMP. Which is the measure of P ? A triangle labeled M N P. Angle N M P is labeled (3 x minus 2) degrees. Angle M N P is labeled (x plus 6) degrees. CLEAR SUBMIT 34 40 49 100

Do the measures and shape represent what you would expect based on randomly determined values? Why or why not? Include the data set of the 30 random values and your output in your response.

Assume the following new probabilities: P(customer makes a purchase)=0.750 P(Customer does not make a purchase)=1-0.750 Compute the probability that neither customer purchases( #purchases=0), and enter your answer with 3 decimal places

To answer this question, provide your R code, R outputs, images and explanations where required. Use data s256i from the package geoR. This is the simulated data set with the coordinates of data locations and numeric data at them. a. Produce a sample variogram on the interval [0,1] using 20 bins. (0.5 mark) b. Fit the spherical variogram to the

Please see the attachments for questions. Group Graded Assignment 6 Instructions Complete the Assignment, name it as GA or GAG GroupXX_Assign6.xlsx (where XX is your Group Number), and upload and submit to the instructor through D2L, using the link named \"Group Graded Assignment 6.\" Do not enter anything in the spreadsheet cells that are black,
image text in transcribedimage text in transcribed

I need full working out. Please Q3:(10 points) Consider the elastic-net optimization problem: B(X) - arginin (yi - Bo - EBUY + AL (off, + (1 -6)8;) Show how one can turn this into a lasso problem. using an augmented version of X and y
image text in transcribed

Pick one of the following statistical topics: - Probability - Descriptive Statistics - The Normal Distribution Motor-Vehicle Safety in the 21st Century Motor vehicle crashes are among the top 10 causes of death for U.S. residents of all ages and the leading cause of death for persons aged 5-34 years. In terms of years of potential life lost before

(b) Carefully interpret the value of the estimated coefficient of WT9 in the multiple regression of BMI18 on HT9 and WT9
image text in transcribed

A triangle and incomplete proof are shown. Given: LB=ZC AD is an altitude of AABC. Prove: AABC is isosceles. D B Place the statements and reasons in the blanks to complete the flow chart proof. AD is an altitude of AABC. LB= 4C Given Given A ADC = 4 ADB AC = AB m < ADC = 90 o m 4 ADB = 90 0 4 ADC = 4 ADB Definition of an Definition of AABC is

REWRITE THIS CODE library(ggplot2) library(tidyr) # Transform data into long format for ggplot df_long % select(period, aapl_apple_inc, hon_honeywell_inc) %>% gather(key = "company", value = "stock_price", -period) # Create line plot p

Modified CDH Game mCDH(n, G, B)) Prove that if there exists a PPT adversary A for which Pr[CDH(n, G, A) 1] is nonnegligible, then there exists a PPT adversary B for which Pr[mCDH(n, G, B) 1] is non-negligible

Solve the right triangle ABC, with C= 90 A = 47 40', c= 671.6 ft B= __ __' (Simplify your answers. Type an integer or a decimal.) a = __ft (Simplify your answers. Type an integer or a decimal. Round to the nearest tenth if needed.) b = __ft (Simplify your answers. Type an integer or a decimal. Round to the nearest tenth if needed.)

please help The income of males in each state of the United States, including the District of Columbia and Puerto Rico, are given in table #9.3.3, and the income of females is given in table #9.3.4 ("Median income of," 2013). Is there enough evidence to show that the mean income of males is more than of females? Test at the 1% level. Table #9.3.3:
image text in transcribed

Independent random samples of 100 east-side residents and 120 west-side residents of a large city were asked whether they will vote for candidate Jones in an upcoming election. Of the 100 east-side residents, 70 said they plan to vote for Jones. Of the 120 west-side residents, 72 said they plan to vote for Jones. In the calculation of a 90%

Suppose that 10% of people own dogs. If you pick two people at random, what is the probability that they both own a dog?

Homework Question 50% of Reese's Pieces candies are orange. The Reese's Pieces applet lets you simulate draws from a hypothetical population of Reese's Pieces and take data on the orange candies in your sample(s). (This applet was created by Professors Allan Rossman and Beth Chance at Cal Poly, San Luis Obispo.)

SSPS 1) In EXCEL: Make a Figure (bar graph) of your means 2) In SPSS: Run analysis to compare groups (using a t-test) with means and standard deviations in output in SPSS 3) Include and upload of your SPSS output. 4) Write results section Make sure you include: a. PARAGRAPH i. The type of analysis you ran (t-test, ANOVA, chi-square ...) ii. Your
image text in transcribedimage text in transcribedimage text in transcribed

A university demonstrated the use of satellite image maps for estimating urban population. A portion of a city was partitioned into n=128 census block groups, and satellite imagery was obtained. For each census block, the following variables were measured: proportion of block with low-density residential areas (x 1 ), and proportion of block with

Evaluate the line integral by two methods: 1. directly and 2. using Green's theorem c y d x x d y C's the circle with center the origin and radius 4

If X is a non-negative random variable with mean 35, what is the: a. E[X3 ] b. E[ X] c. E[logX] d. E[e X]

Question 3 (2 points) Determine the volume of the parallelepiped formed by the vectors 2, 1, 3], [-5, 1, 0], and [4, 0, -1]. Round your answer to the nearest WHOLE units. Include the proper UNITS. - A
image text in transcribed

can you please help me with my hw project please due in one hour and I have covid Purpose: To apply the concepts and computations learned this semester to a real world research data set. General Instructions: Using that data set that I provided related to participants' attitudes towards crime and mental health, please complete the instructions

Use the shell method to find the volume of the solid generated by revolving the region bounded by the graphs of the equations y=x^3, y=0, x=2 about the line x=5.

Using induction, verity the enequality \f
image text in transcribed

Escape Room Project: The goal of this project is for you to generate questions for future AP Stats students to answer as they prepare for the final exam. In this project, you will get a chance to show off your math skills, work together as a team, and create an escape room game. The problems you create should get harder as you go along. Some of

Assuming you want to calculate the area of a plot size that has been subdivided into the various rectangular shapes.

Imagine there are 23 people in a room.Suppose that these people were selected randomly.Give a guess as to the probability that there are at least two people in the room who share a birthday.Do you think it is low? 50%? high?Give your reasoning.

How can I know what range can be used to calculate the mean values? Do I need to calculate all the random signals in order to get the answer. I tried a few times but I don't know how to calculate this using the right ways. I also included the question in picture form. \f
image text in transcribed

I have no idea about this question. Bb ASKHW 2 for MAT 12 X Paper HW 2 for MAT 1 X MAT 123 : IntroductionX *Please refer to the att X Course Hero X X C blackboard.stonybrook.edu/bbcswebdav/pid-5117048-dt-content-rid-36693559_1/courses/1198-MAT-123-SEC01-80622/Paper%20HW%202%2... . . . MAT 123 Fall 2019 Name Recitation Problem 2 (4 points): Given
image text in transcribed

You are interested in determining if the variability of the weights of male and female students are equal.The hypothesis test that the variance of the weight of female students was equal to the variance of the weight of male students, Ho: f2 = m2,using the f-statistic, at a level of significance, (shown on right), resulted in the p-value (shown on

Given sin u = -(9)/(11) with \pi

National Bearings manufactures bearing at plants in Portland Oregon, Houston Texas, and Jacksonville Florida.To measure employee knowledge of Total Quality Management. (TQM), six employees were randomly selected at each plant and tested.The test scores for these employees are given in DATA. Managers want to know if, on average, knowledge of TQM is

According to a NY Times article on December 13, 2009, The average selling price of a 32-inch LCD TV was $600. Use the annual CPI values from your text to compute the cost of that same TV in 2010 dollars. Express your answer rounded to the nearest cent. $ help (cpitable)

Explain why correlation does not equal causation. Describe the data characteristics necessary to calculate a Pearson correlation coefficient.

a) Find the standard error of the mean for each sampling situation (assuming a normal population). (Round your answers to 2 decimal places.) Standard Error (a) = 64, n = 16 (b) = 64, n = 64 (c) = 64, n = 256 (b) What happens to the standard error each time you quadruple the sample size? The standard error isreduced Correct by half.

Minimize S=x+y subject to xy=9 and both x>0 and y>0 Maximize P=xyz subject to x+y=30, y+z=30, and xyz > 0

Case: Annual inflation in Canada has been low for several years. Suppose a provincial survey is conducted by a polling organization, and Saskatchewanians answered the question: "are you not at all concerned, somewhat concerned, or very concerned that inflation will climb?".The results are given below. Not at all concerned - 280 Somewhat concerned

point of intersection if there is 16. Solve the system of inedualities by graphing. Indicate the one. 52 - 2yt
image text in transcribed

A class is given an exam. The distribution of the scores is normal. The mean score is 70 and the standard deviation is 7. Determine the test score c, such that the probability of a student having a c score greater thanc is61% 61% P(x>c)=0.61 Find c rounded to one decimal place.

help Cell phones and Toilet Bowls A recent study claims more than 3 in 4 Americans use their smart phone while on the toilet. Dr. Ron Cutler, director of biomedical science degrees at Queen Mary's University states that this can lead to the transfer of viruses and fecal contamination. To test the claim that more than 75% of Americans take their
image text in transcribed

(c) Explain how you could construct from the data a scatterplot for which the least squares line would have a slope of 0.26 and an intercept equal to 0
image text in transcribed

Here's a sensitivity report for a cost minimization problem.If we could relax the most restrictive constraint by .5 units, calculate the change to the objective value according to the sensitivity report, (carrying to 2 decimal places). \f
image text in transcribed

Find the Taylor Series at x=0 for the function f(x) = 4x/3+2x

Let X1, . . . , X n be randomly distributed as normal distribution with mean 0 and variance b. Find the distribution of Z : (% 221:1 X32 (8 pts)|
image text in transcribed

food preparation in a restaurant must be performed carefully to prevent food spoilage or undercooked or overcooked food.oven temperature is a critical factor.one concerned chef monitors oven temperature hourly,he wants to be 95 percent confident that the average oven temperature is 350 degrees. from his 50 samples,he has calculated an average oven

What is the unemployment rate? Multiple choice question. The percentage of the population that have been out of work at some point in their working career The percentage of civilians at least 16 years old who are unemployed and tried to find a job within the prior four weeks The total number of people who have lost a job in the past year The

QUESTION 16 b) What is the variance of the number of vehicles out of 200 which have at least one underinflated tire? a. 6.48 b. 7.07 c. 42 d. 50
image text in transcribed

Showing 700 - 800 of 1501
  • 8 / 16