Mathematics Questions and Answers December 26, 2019

Im conducting a research study and it requires to gather pre and post data and I will analyze it using paired t-test. My question: is my method correct? If yes, should my tabulated data be like this? Survey question Pre Post WM VI WM VI WM = weighted mean, VI = verbal interpretation Last question What values do I need to perform the paired t-test?

7,8,9,12,13 Level 2 Use truth tables in Problems 7-14 to determine whether the given compound statement is a tautology. 7. (p / q) V ( p - ~q) 8. (P V q) (q- ~p) 9. ( ~p - q) -p 10. ( ~ q = p) -q 11. (p / q) (pVq) 12. (p V q) (qVp) 13. (p -> q) (~pv q) 14. (p V ~q) (~pv q)

Responded Did not Respond Total Traditional Form 27 3 30 Online Form 20 9 29 Total 47 12 59 The chi-squared value was found to be 4.256. State the results/conclusion and explain what this means in the context of this problem?

Metode Statistik/Sats4121

3. Selama tujuh hari dua kepala daerah (misalkan P dan Q) mencoba membandingkan kasus kematian yang diakibatkan Covid19. Tabel berikut adalah jumlah kasus kematian dari dua daerah tersebut selama 7 hari Hari Senin Selasa Rabu Kamis Jumat Sabtu Minggu umlah kasus kematian 7 6 8 10 5 7 3 4 3 2 6 12 10 6 Dengan menggunakan tingkat signifikansia 5,

Would you please complete this ASAP , please, I need the material for an upcoming test. !!!!!! Within 40 minutes of submission, please!! ANSWERS ONLY, NO NEED FOR EXPLANATION. 2. DETAILS Use the Laws of Logarithms to expand the expression. In 3x 8 (x + 7) Submit

what would be three sampling techniques used with the adolescent population and what are the pros and cons of each technique

Number 16 Verify the indicated definition in Problems 15-18 from Table 3.9 using a truth table. 15. either p or q 16. neither p nor

A step by step process would be great Thanks for your time 25 Ship A is 48 km south of ship B. Ship A is moving due west at a rate of 8.3 km/h. Ship B is moving due east at a rate of 12 km/h. Find the rate of change of the distance between the two ships 1.5 hours later. /1 10.88

10(9) 0.5 12x 30(11)

What is the future value of a 10-year investment of $1 100 at an APR of 9% compounded monthly? Round your answer to the nearest cent. future value: $

In naive-Bayes classification,the co-occurrence probability p(X 1 ,..,X p | C j ) is approximated, assuming independence of predictors within a class, asp(X 1 |C i ) * p(X 2 |Cj) *..* p(X p |Cj)

6) Celsius, C, and Fahrenheit, F, are two ways to measure temperature. You can convert one to the other with the following equation: F = 1.8C + 32 a) (6 points) Find the Celsius temperature when the Fahrenheit temperature is 59 degrees. b) (4 points) Does the equation represent a proportion? Explain why or why not

5 , A random Sample of 25 of the record high temperatures in the united states had mean 1 14. 6 degrees Fahrenheit andthe standardid deviation to be sz91 13. Find the standard error of x for constructing a 95% confidence interval for hoes mean highest temperature

5. Cost and age of a car B. Directions: Graph the following regression lines 6-8) y=0.3x+2.5 9-10) y=2.6x + 0.56

The learned coefficient is w_2 = 2 what is the relationship between x2 and y, after training? eg if x_2 goes up by 1 what happens to the other one? Does y go up by 2? Everything else is constant

3. [-/2 Points] DETAILS WANEFMAC7 3.1.007. MY NOTES PRACTICE ANOTHER Compute the simple interest INT for the specified length of time and the future value FV at the end of that time (in dollars). Round all answers to the nearest cent. You borrow $15,000 for 10 months at 3% per year. INT = $ FV = $ Need Help? Read It Watch It

Fill in the P (X" = x) values to give a legitimate probability distribution for the discrete random variable X, whose possible values are 2, 3, 4, 5, and 6. Value x of X P(X = x) 2 0.25 4 0.28 0.23 6

A team of researchers found that age distributions in a population of 100,000 people was not Normal. However, after they took a large number of simple random samples, each with (N=100), they observed that the sampling distribution of mean tended toward Normality. Really? Why is it possible?

(a) Write the BCD code for 9 (1 marks) (b) Write the BCD code for 6 (1 marks) (c) What is the BCD code for 15? ((1 marks) (d) Explain how can the answer in (c) can be obtained if you add the answers in (a) and (b). (2 marks)

Calculate F-statistic Source Sum of Squares df Mean square F-statistic Effect 160 2 80 Error 1600 12 133.3 Total 1760 14

The smiths are shopping for a new home. They've figured that they can afford monthly payments of at most $2200 a month. The bank is offering them a 30 year, $350,000 mortgage with a fixed interest rate of 6% charged on the unpaid balance. Can the smiths afford the monthly payment associated with this loan

Suppose that X and Y have the following joint probability density function. f(x,y)=%y, 0 0,x2

Suppose that X and Y have the following joint probability density function. (a) Find E(XY). (b) Find the covariance between X and Y.

Total incremental cash flow (240) (28) (268) Five-year IRR 40.696 Net present value 309 Discount rate 12% Tax rate 38% Support cost inflation rate 396

M. SIS Bb Bb X Bb Bb Bb Bb Bb CDC Bb Bb = M 6 5 401. W G M M Q AM GAGG 5 + X CD A blackboard.stonybrook.edu/bbcswebdav/pid-1756846-dt-content-rid-14613836_1/courses/1226-HNC-360-SEC95-65885/HNC%20360%20CDC_NHANESexample. X HNC 360 CDC_NHANESexample copy.xIsx Download Share Edits will not be automatically saved. Save now File Edit Insert Format

Can a significance level of 0.05 be the hypothesized population proportion? I am also curious why when using 0.05 I notice it is written 0.5 instead?

12. Let (X,) be a sequence of uncorrelated random variables (i.e., Cov(X;, X;) = 0 for i # j) with expectation 0 and variance 1. Prove that for any bounded random variable Y, we have lim,-+ E[X,Y] = 0. Hint: With an := E[X,Y], first consider 2 BY -COX)

Question 6 10 points Save Provide an appropriate response. High temperatures in a certain city for the month of August follow a uniform distribution over the interval 61F to 91"F. Find the high temperature which 90% of the August days exceed. O 91 F O 71.F 88.F 64.F

Please show all the steps thank you :) Question 1 (0.25 Mark) : Draw a circuit diagram corresponding to the following Boolean expression: AB + C' Question 2 (0.25 Mark): Draw a circuit diagram corresponding to the following Boolean expression: (A+B)(C+D)

Given the following pairs of z values, find the area under the normal curve between each pair of z values, Refer to the table in Appendix B1. (Round the final answers to 4 decimal places.) 0. 2=-1:35 and 2= 025 b. 2=-245 and 2= -175 c. Z= 131 and 2= 2.85 d. z= -243 and z =197

8. What is the predictive adequacy of the null model relative to the alter- native model? Round your answer to 2 decimal places. (Fill in the blank.) BF01 = 9. What is the predictive adequacy of the alternative model relative to the null model? Round your answer to 2 decimal places. (F ill in the blank.)

What data analysis techniques can be applied to an ordinal survey in excel (ie customer satisfaction)

If the mean income for people in the US were $45,000 with a variance of 625000000, what would be the probability that a randomly chosen American will have an income greater than $95,000?

O TRIGONOMETRIC FUNCTIONS Sine, cosine, and tangent ratios: Numbers for side lengths A right triangle has side lengths 5, 12, and 13 as shown below. Use these lengths to find cosM, tan M, and sinM. M COSM = 13 X tan M = 5 ? L 12 N sin M =

Solve the following linear programming using the graphical method. Minimise = = 5r1 + 712 subject to 2x1 + 3.c, 2 6 3r] - r, $ 15 2r1 + 512

The Central Intelligence Agency (CIA) has specialists who analyze the frequencies of letters of the alphabet in an attempt to decipher intercepted messages. In standard English text, the letter "a" is used at a rate of 8.5%. Find the mean and standard deviation for the number of times the letter "a" will be found on a typical page of 2400

n x O 1 2 3 4 5 5 0.81 p (Xx) 0.0002 0.0053 0.0450 0.1919 0.4089 0.3487

The owner of a local night club has recently surveyed a random sample of n = 250 customers of the club. She would now like to determine whether the mean age of her customers is over 30. If so, she plans to alter the entertainment to appeal to an older crowd. If not, no entertainment changes will be made.

Test: POST UNIT 6 - TEST - Ch. 9 Question 1 of 13 Construct a confidence interval of the population proportion at the given level of confidence. x = 120, n = 1200, 95% confidence The lower bound of the confidence interval is (Round to the nearest thousandth as needed.) The upper bound of the confidence interval is (Round to the nearest thousandth

Question 7 5 pts 9 1 0 Details If a seed is planted, it has a 75% chance of growing into a healthy plant. If 12 seeds are planted, what is the probability that exactly 4 don't grow

help with solving n please! i have a general idea of what to do but i feel unsure about my answer.

Question 5 ima places 0.2 Gee die waarde van 0.2 Give the standdidised value of p

If t cv = 2.396, write the decision rule for a one-tailed test for (a) when to reject the null hypothesis and (b) when to fail to reject the null hypothesis. ( Hint: Contemplate the sign of t cv and what that means about what the researcher believes.)

M. SIS Bb Bb X Bb Bb Bb Bb Bb CDC Bb Bb = M 6 5 401. W G M M Q AM GAGG 5 + X CD A blackboard.stonybrook.edu/bbcswebdav/pid-1756846-dt-content-rid-14613836_1/courses/1226-HNC-360-SEC95-65885/HNC%20360%20CDC_NHANESexample. X HNC 360 CDC_NHANESexample copy.xIsx Download Share Edits will not be automatically saved. Save now File Edit Insert Format

A vet takes the weights of all of the puppies that come in at a specific age for a full month. He does not differentiate between dog breeds or gender. The following 20 values are the weights he records (in pounds): 10, 15, 7, 21, 11, 13, 9, 17, 14, 10, 11, 12, 25, 4, 9, 13, 16, 14, 12, 11 Find the sample mean, standard deviation, and confidence

Give the best answer. POPULATION: All business establishments serving customers face-to-face at a shopping place VARIABLE OF INTEREST: Establishment manager's / owner's satisfaction of customers' conformity to minimum COVID-19 health protocols Answer the following questions: 1. Survey or experiment? 2. Why survey or experiment? 3. Which sampling

Step solution please for all parts.

solve the equation For the box plot below, state the following: a) The minimum value b) The first quartile c)The second quartile d) The third quartile e) The maximum value f) The interquartile range 10 11 12 13 14 15 16 17 18 19 20 21 22 23

2, 3 and If f) f(g(h)))

For the following exercises, use the graph of the one-to-one function shown in Figure 12. y _. _ 1 30. Find) andf'l(2). Figure 12

Question 1/ Vrai.g 1 (4 decimal places/ 4 desimale pakke) he probability that more than 6 learners will sit at a detective computer is:/ Die waarskynlikheid dat meer as 6 leerders by'n foutiewe rekenaar sai sit is

Metal Fabrication Corporation manufactures their product in two departments. For the month of June of the current year, Cutting Department, the first department started to process 4,600 units. Materials amounting to P11,500 all were placed at the beginning of the process. Direct labor paid was P6,450 and overhead applied was P7,525. The department

Please provide a histogram of the data below 6.6 6.6 6.6 6.5 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.2 7.3 7.4 7.5 7.5 7.5 7.4 7.3 7.1 6.9 6.8 6.6 6.5 6.4 6.3 6.3 6.2 6.2 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.0 7.1 7.2 7.2 7.3 7.3 7.4 7.4 7.4 7.5 7.6 7.7 8.0 8.3 8.7 9.0 9.2 9.3 9.4 9.5 9.5 9.6 9.7 9.8 9.9 10.0 10.1 10.3 10.5 10.8 11.2 11.6 12.0 12.4 12.7

The response times for a random sample of 50 medical emergencies were tabulated. The sample mean is 13.25 minutes. The population standard deviation is believed to be 4.2 minutes. The EMS director wants to perform a hypothesis test, with a .05 level of significance, to determine whether the service goal of 12 minutes or less is being achieved.

Deviational variables: are added to constraints to indicate acceptable departures from the target values of their corresponding goals. are positive for underachievement only. are positive for over-achievement only. are negative.

Out of 50 people which are either tall or fat or both, 29 are tall, and 33 are fat. If I select one random person out of the 50 what is the probability, he is both tall and fat?

A researcher try to predict the yield (y) of coffee trees based on different locations (x1, x2, x3, and x4). If the following info is provided: n = 15, Total SS = 16382.17, SSR = 15913.04 (a) Write the regression model of the yield? (b) Find the variance? (c) Find R 2 ?

it is possible for a pair of variables to be both associated and independent. True or False?

The average amount of a beverage in randomly selected 16-ounce beverage can is 15.8 ounces with a standard deviation of 0.5 ounces. If a random sample of thirty-six 16-ounce beverage cans are selected, what is the probability that the mean of this sample is less than 15.7 ounces of beverage? Answer: (round to 4 decimal places) Please break down

Letf(x)=12(12)x+4. Evaluate f(6). f(6)=

using the binomial tables, if n=20 and p= .4 find the probability for X=7

M. SIS Bb Bb X Bb Bb Bb Bb Bb CDC Bb Bb = M 6 5 401. W G M M Q AM GAGG 5 + X CD A blackboard.stonybrook.edu/bbcswebdav/pid-1756846-dt-content-rid-14613836_1/courses/1226-HNC-360-SEC95-65885/HNC%20360%20CDC_NHANESexample. X HNC 360 CDC_NHANESexample copy.xIsx Download Share Edits will not be automatically saved. Save now File Edit Insert Format

The daily wages in a particular industry are normally distributed with a mean of $198 and a standard deviation of $15. Suppose a company in this industry employs 35 workers and pays them $166.50 on the average. Based on this sample mean, can these workers be viewed as payed differently from among all workers in the industry? Find the p-value for

15. If 9 employees from the company are selected at random, what is the probability that the average salary is more than $5000? A 0.0228 B 2 c 0.9772 D 0.7486

Describe at least one strength or weakness of the use of data from " State-Administered Indigent Defense Systems, 2013 " article?

Finding x- and y-intercepts of a line given the equation:... Find the y-intercept and x-intercept of the line. 3x+4y=-11 y -intercept: E X x -intercept:

Let A B and C Find A u B u C

Video: Z Score Formula L A data set follows a normal distribution. The mean of the data set is 67 and the standard deviation of the data set is 2. Find a z-score for a data value of 64 from the set. Round your answer to two decimal places. Submit

1. A perfume company is making; two scents out. of three chemicals. These are Scent A and Scent B which contributes Php 50 and l'hp 40: respectively: in the total prot. The daily production input and available supply are given below. Scent-s Chemical 1 Chemical 2 Chemical 3

In a particular class, an exam has a mean score of 50 and a standard deviation of 10. What is the probability that a student would score between 45 and 55?

(2 mark) When estimating an unknown population mean , which estimator is superior, the point estimate or a 95% confidence interval? Briefly explain and Justify your answer. Please send me answer ASAP.

Summary statistics from a sample were: EX2 = 50, EX = 15, and N = 6. The standard error of the mean is 1.02 O .65 O .26 O .41

The experiment is: 1. Mechanism for predicting uncertainty 2. None of the above 3. Process for observing an event 4. Set of all possible alternatives of an event

The table value z = .70 is .2580. The z = .70 value occurs at what equivalent percentile? In detail solution and don't copy from other sites

The number of passengers in each of 120 randomly observed vehicles during morning rush hour was recorded, with the following results: x 1 2 3 4 5 f 84 29 3 3 1 Find the mean, the median, and the mode of this data set.

A histogram that is positively skewed is also called

For a sample with M 50 and s 8, what is the zscore corresponding to X 52 0.25 0.50

If I find F(3,16) = 7.25 what conclusion should the research draw about my null hypothesis if I set my alpha to 0.5 A. Not enough information B. Reject the null/ significant C. Accept the null/ not significant D. Accept the research hypothesis

I hope question is clearly visible LINI Calculate the Standard Deviation 13 Marial

4.2.1: Empirical rule and probabilities 80.gx32q Jump to level 1 -30 -20 20 Use the empirical rule to find the probability corresponding to the shaded region above STATS WEEK AJpg

Cauchy Distribution 8 POINTS Start with U ~ U[0, 1] and let u = F(x) and determine F-(u) if we want X ~ Cauchy (a, B). Let a = 3 and B = 6: fx (20) = B2 + (20 - 0 ) 2

Even when the math is done correctly, biased questions, biased sampling, or other external factors can still lead to incorrect conclusions

The following hypothetical data were obtained from a random sample of nine college freshmen. They represent attitude scores toward a statement made by the President, "The economy has improved in the last 12 months". Scores ranged from 9 (strongly agree) to 1 (strongly disagree). The investigator was interested in estimating the variability of

A marketing company is interested in the proportion of people that will buy a particular product

The author argues that the financial crisis brought by the U.S. Mortgage meltdown of 2008 was caused by cloud computing. What evidence presents that this is true? The author tells us that algorithms are replacing creativity and skill for the sake of the "big-n". Discuss how this is supposed to work. From the readings thus far (connecting the

3. Analysis of Pennies In an analysis investigating the usefulness of pennies, the cents portions of 100 randomly selected credit card charges are recorded. The sample has a mean of 47.6 cents and a standard deviation of 33.5 cents. If the amounts from 0 cents to 99 cents areall equally likely, the mean is expected to be 49.5 cents. Use a 0.01

In the distribution below, for a one-tailed alternative hypothesis test at an alpha level of 0.05, which z critical value would allow us to reject the null hypothesis?

Defects can occur anywhere on the wheel of a car during the manufacturing process. If X is the angle where the defect occurs, measured from a reference line, then X can be modeled as a uniform random variable on the interval from 0 to 360 degrees.a) What is the probability that the defect is found between 0 and 180 degrees?b) What is the

2. What is the definition of a "confounder"? (a)A third variable that influences both exposure and treatment (b)The treatment effect is different for different levels of the confounder (c)The treatment effect cannot be separated from a confounder due to correlation.

Express the following expression as a function of an acute angle less than 45 degrees sin(789)

Summary statistics from a sample were: EX2 = 50, EX = 15, and N = 6. The standard error of the mean is 1.02 O .65 O .26 O .41

If you want to be 95% confident of estimating the population mean to within a sampling error of 4 and the standard deviation is assumed to be 14, what sample size is required? Please, add EXCEL steps and formulas/

Give an example of an unrepresentative sample used in a statistical generalization

For 100 births, P(exactly 58 girls) 01223 and P(58 or more girls) 0.067. Is 58 girls in 100 births a significantly high number of girls Which probability is relevant to answering that question Consider a number of girls to be significantly high if the appropriate probability is 0.06 or less. The relevant probability is a significantly high number

A labor rights group wants to determine the mean salary of app-based drivers. If she knows that the standard deviation is $1.3, how many drivers should she consider surveying to be 90% sure of knowing the mean will be within $0.71$0.71?

1. Share a scholarly resource that you believe either solidifies or disputes Dr. Pinker's findings. 2.Discuss the resource in detail, in relation to Dr. Pinker's Ted Talk. Be sure to properly cite this additional resource

Question 1, 23.2.7 2 lo calcutale the slope of a line tangent to the curve of the function y = rm= 5x2 at the pom: P(x1.y,) - P(3.45)

I asked 10 people what they thought was an adaquit amount of time was to spend studying for a major college class and the results were. 6 hours, 8 hours, 3 hours, 5 hours, 10 hours, 15 hours, 8 hours, 6 hours, 9 hours and 10 hours. Please provide the Mean, Standard variation, and Confidence intervals and also assume .05 as alpha value.

The functions f, g, and h are defined as follows. f ( x ) = X g (x) = 6x -12 h(x)=V-2x+1 4+x Find f(2), 8 - 3 ), and h ( - 3 ) . Simplify your answers as much as possible. f ( 2 ) = 1 OVO X 5 ? h (- 3 ) = 1

SelfEsteem Score 15 1500 Simple Scatter of Overall Score on SelfEsteem Scale by Body Mass Index 20.00 2500 30 _00 3500 4000 45.00 Body Mass Index R2 Linear . 0.030

The values 20, 21,21 22 22,22,22 23,23,23,23 23 are they following a normal distribution?