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Mathematics Questions and Answers August 14, 2022

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3. The height (in feet) and volume of usable lumber (in cubic feet) of 32 cherry trees are measured by a researcher. The goal is to determine if volume of usable lumber can be estimated from the height of a tree. The results are plotted below. Volume y axis Height x axis In this study, the response variable is a) height b) volume c) height or

solve the question Measurements of scientific systems are always subject to variation, some more than others. There are many structures for measurement error, and statisticians spend a great deal of time modeling these errors. Suppose the measurement error X of a certain physical quantity is decided by the density function f(x) = [*(3-r'), -15251,
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An insurance company states that 8% of all house insurance claims are fraudulent. If this estimate is correct, what is the probability that in a random sample of 184 house insurance claims, the proportion of claims that are fraudulent is (3 marks)less than 0.05? (4 marks)more than 0.10?

how do i solve these? "A Practice Final - MA 121, section 0 X Course Hero X *Course Hero X X C webassign.net/web/Student/Assignment-Responses/submit?dep=24330742&tags=autosave#question289444_11 18. [-/2 Points] DETAILS The cost of a first-class postage stamp in 1962 was 4%. In 1999 it is 330. The cost was (and is) growing exponentially. What was
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If a researcher uses pet ownership (Yes, No) with political affiliation (Democrat, Republican, Independent) in a factorial design , the study will be a three-way analysis of variance. be a 2 3 analysis of variance. have eight cells. have four marginal means

Option 1 A. Excluding the non-monitizers, what are the three customer segments, and how many users are in each segment? Answer 1. Minnows: Approximately 1.2 million users (1.03% of total users) 2. Dolphins: Approximately 1 million users (0.86% of total users) 3. Whales: Approximately 230,000 users (0.2% of total users) B. How much monthly revenue

1. JohnLeessavingsaccounthasabalanceof$ 2192.After3 months,whatwilltheamountof interest beat 5.2% peryear? 2. Whatamountwillbeinanaccountafter1.5yearsif$4,000isinvestedat5%compounded semiannually? 3. Whatisthefuturevalueofanordinaryannuityattheendof3yearsif$200isdepositedeachquarterintoan accountearning6%compoundedquarterly? 4.

Problems: 1. (6 points) Consider the following list of elements in P3(F): 2241, 22z 242 242z2+1 (a) Prove that these elements are linearly independent. (b) Based on part (a) and the dimension of P3(F), do these elements span? Please explain. 2. (8 points) In each case below, find a basis for the given vector space V over F. Please prove that your
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a family has three children a. find a sample space for the genders of the three children in a family using a tree diagram. b. what is the probability that the middle child is a boy?

What is the p-value of the test statistic?Answer choices are rounded to the thousandths place. Steven measures the weight of a random sample of 49 basset hounds. The mean weight was 45.8 pounds, with a standard deviation of 3 pounds. Using the alternative hypothesis that u
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Listed below are amounts of court income and salaries paid to the town justices for a certain town. All amounts are in thousands of dollars. Find the (a) explained variation, (b) unexplained variation, and (c) indicated prediction interval. There is sufficient evidence to support a claim of a linear correlation, so it is reasonable to use the

The duration of long-distance telephone calls is normally distributed with a mean of1 8 = minutes and a standard deviation of1 2 = minutes. If a random sample of 64 telephone calls is used to reflect on the population of all long-distance calls, what is the probability that the sample mean call duration: (3 marks)will be more than 14 minutes? (6

10. Correcting False Assurance Client: My business was destroyed in the last tornado. There is nothing left of the building, just piles of rubble. The insurance company guy came to talk to me last week about rebuilding and getting the business going again. I just don't see how I can start all over. I am old, and I don't have the energy. Social

The position of a car at time t is given by the function p(t) = t^2 + 3t 42. Where will the car be when it moves at a velocity of 13? Show the process. Assume t 0.

Consider four multi-valued random variables A (age), H (height), W (weight), and S (salary). We know that S is independent of H and W; A, H, and W are NOT independent of one another. We are provided the probability tables/functions for the following six joint, marginal, and conditional probabilities. The six probabilities: P(S) P(W, A) P(H,S)

2. Consider the Weird-Weiner WW(0) family, where 0 > 0; it has pdf f(x, 0) = 4x3/ 04 for 0
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What is the probability that you move your left hand OR you move an extremity to green? Express your answer as a decimal rounded to the nearest thousandth (3 decimal places). \f
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According to my assignment which provides the same exact data, I need to calculate n^2=t^2/(t^2+df) 15^2/(15^2+14)=.941 Is this correct? Did this student have the wrong answer? Isn't t=15 not t=14?

In a game, a single event consist of a fair six-sided die being thrown followed by a flip of a fair two side coin. Stated the number of possible outcome in the sample space

The water diet requires you to drink 2 cups of water every half hour from when you get up until you go to bed but eat anything you want. Four adult volunteers agreed to test this diet. They were weighed prior to beginning the diet and 6 weeks after. Do one-sample t-test using the difference with following hypotheses using ? = 0.05 and summarize
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21) A normal distribution has = 28 and = 5. (a) Find the z score corresponding to x = 23 . (b) Find the z score corresponding to x = 41 . (c) Find the raw score corresponding to z = 3 . (d) Find the raw score corresponding to z = 1.7 . 28) Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated

Which of the following statements about graphing data on problem and replacement behaviors is NOT correct? Data points should be connected between the baseline and intervention phases. The data points for baseline and intervention phases should be separated by a vertical line. Data points for problem and replacement behaviors should be separate

Five elementary schools are located at the following (x, y) coordinates: (2, 7) (3, 3) (1, 6) (7, 4) (6, 2) You want to build a park at the median center of these. Where should it be

Construct a 90% confidence interval to estimate the population proportion with a sample proportion equal to 0.44 and a sample size equal to 100. A 90% confidence interval estimates that the population proportion is between a lower limit of ____ and an upper limit of _____.

The Student Grades data set: This data set provides information about midterm and final exam scores for students. "Final Exam" is the dependent variable and "Midterm" is the independent variable. The NULL hypothesis states that midterm and final exam are not related. It is needed to construct regression model for this dataset and answer questions.
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The college placement office is developing a model to relate grade point average (GPA) to starting salary for liberal arts majors. Ten recent graduates have been randomly selected, and their graduating GPAs and starting salaries were recorded. GPA and Starting Salary GPA Starting Salary (Thousands of Dollars) 3.8 39.2 3.3 46.3 3.5 30.9 3.2 25.1

Problem19. A biological reaction proceeds at a rate of S'(t) = -10-41.5 - 0.2t2, moles/sec where S is the concentration of the substrate. If S(0) = 0.4 moles, find the con- centration of the substrate at t = 20. A decimal number representation is not needed
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Please help with solutions and steps The control department of a light bulb manufacturer randomly picks 4400 light bulbs from the production lot every week. The records Show that, when there is no malfunction, the defect rate in the manufacturing process (due to Imperfections in the material used) is 1%. When 1.25% or more of the light bulbs in
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Use the standard normal curve table to find 25.1% of the total area to the right of z. Select one: a.0.67 b.-0.68 c.0.33 d.-0.67

A supermarket is using a new statistical tool to help in ordering bottles of raspberry iced tea. A random sample of the number of bottles sold per day is given in the following table: 34 35 37 39 40 41 41 42 44 45 47 47 48 48 50 50 51 53 Assume a mistake was made in the data entry process and the minimum value was supposed to be 20 bottles. Which

Can you please help me solve this? Below are the 30 random values for the incomes of married and not married and the instructions. Values for the valuable #income" Not married 98717, 96572, 96690, 96664, 96886, 96522, 97912, 96727, 96928, 95744, 97681, 95432, 94929, 96621, 95366 married 101829, 98309, 112559, 106894, 98686, 103422, 100964, 95835,

Please post your responses to The following questions: a. Given this technical information, which of the above instruments would you select? b. What additional information would you want to have to make your decision
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A national survey reported that 34% of adults in a certain country have hypertension (high blood pressure). A sample of 24 adults is studied. Round the answers to four decimal places. a. What is the probability that more than 8 have hypertension?

ASIGNACIN 6 1.- En cierto grupo de personas, el 23% tiene un nivel de colesterol en sangre mayor a 250 mg/dl a) Si aleatoriamente se escogen 10 personas, cul es la probabilidad de que 4 de ellos tengan un nivel de colesterol en sangre mayor de 250 mg/dl? . 2.- En un grupo de personas, el 42% tienen obesidad a) Si aleatoriamente se escogen 20

Q1. Provide down the answers for the questions below? \f
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Suppose that you borrow $17 comma 000 for five years at 8% toward the purchase of a car. Use PMT equals StartStartFraction Upper P left parenthesis StartFraction r Over n EndFraction right parenthesis OverOver left bracket 1 minus left parenthesis 1 plus StartFraction r Over n EndFraction right parenthesis Superscript negative nt right bracket

Suppose a random variable, x , arises from a binomial experiment.If n = 6, and p = 0.30, find the following probabilities using technology. a.) P x 1 b.) P x 5 c.) P x 3 d.) P x 3 e.) P x 5 f.) P x 3

Banana tree type 1 yielded 135 bushels per acre last year at a research farm and the farm experienced a drought. This year, banana tree type 2, planted in the same location, yielded 167 bushels per acre. The researchers do not know whether the difference is a result of the superiority of type 2 banana trees or the drought. What is this an example

Let's pretend that in a hospital, 7%of patients are"high-risk"while the others are"lower-risk".For patients that are high-risk,75%will be re-admitted within30days.For"lower-risk"patients,the 30day re-admittance percentage is 15%. If a patient was re-admitted, what is the probability that they were classified as lower risk? Let's pretend that in a

INFERENTIAL ANALYSIS Blood Pressure 0: Age 2. You now want to determine if there is a significant difference in the mean ages of stroke patients based upon whether the patient falls into the low, normal, or high blood pressure group. a. First, sort your sample by the BP variable \"low (0), normal [1}, and high b. C. d. (2).\" Using the appropriate
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1.What are the means, medians, modes, range and standard deviation for each of the six car models? Draw box plots. 2.What are the means, medians, modes, range and standard deviations for each of the six months (January - June)? Draw box plots. \f
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Please show work on the paper for me easier to understand \f\f
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A method currently used by doctors to screen women for possible breast cancer fails to detect cancer in 15% of the women who actually have the disease. A new method has been developed that researchers hope will be able to detect cancer more accurately. A random sample of 80 women known to have breast cancer are to be screened using the new method.

From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.69 with a population standard deviation of 3.54. What is the 95% confidence interval for the amount of time spent on administrative issues?

A community health association is interested in estimating the average number of maternity days women stay in the local hospital. A random sample is taken of 36 women who had babies in the hospital during the past year. The following numbers of maternity days each woman was in the hospital are rounded to the nearest day. 5 3432531434 2353243231

A veterinarian keeps data on the weights of puppies. The scatter plot shows a line of fit for the data, and the table lists the residuals. A scatter plot is titled, Puppies, with x-axis labeled, Age (in days), in increments of one and y-axis labeled, Weight (in ounces), in increments of one and containing ordered pairs 1,4 and 1,7 and 2,64 and 3,4

You collected data on your members' pull-up scores that is seen in the table. (a) Calculate the t-score to examine the mean difference between the 1st week and the 14th week and (b) is the t-score statistically significant or insignificant at .05 level?. \f
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Why is it important for researchers to understand Type I and Type II errors?

Translate this sentence into an equation. The difference of Matt's height and 24 is 50 Use the variable m to represent Matt's height. 0-0 X
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A common design requirement is that an environment must fit the range of people who fall between the 5th percentile for women and the 95th percentile for men. In designing an assembly worktable, the sitting knee height must beconsidered, which is the distance from the bottom of the feet to the top of the knee. Males have sitting knee heights that

Standard IQ scores have a mean of 100 and a standard deviation of 15. When Yolanda was in 1st grade, her IQ was measured to be 80. When she was in 3rd grade, it was measured to be 90. Her psychologist wants to express Yolanda's IQ in terms of a z-score. To do so, the psychologist takes the average of the two scores (the one from 1st grade and the

According to a survey, subscribers to The Wall Street Journal Interactive Edition spend an average of 27 hours per week using the computer at work (WSJ.com Subscriber Study, 1999). Assume the normal distribution applies and that the standard deviation is 8 hours. a) What is the probability a randomly selected subscriber spends less than 11 hours

Need help using this data to determine the equation that represents the relationship between Column A ($ spent), Column B (Family Size) and Column C (Income) and how it describes goodness of fit, as well as if this shows whether there is a relationship between family size and income and how much is spent. Thank you. \f
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The number of television sets coming off a production line each day is known to have a standard deviation of 117.4 sets per day. The production manager tells you that the 90% confidence interval for the population mean was 552.3 to 621.9. How large of a sample was this confidence interval based on? a. 31b. 29c. 33d. 27

Past records indicate that the probability of online retail orders that turn out to be fraudulent is0.06. Supposethat, on a givenday,18 online retail orders are placed. Assume that the number of online retail orders that turn out to be fraudulent is distributed as a binomial random variable. Complete parts(a) through(d) below. Round to four

Ohio University sorted 150 new students into one of the four residence hall greens as follows: East Green 44, South Green 40, West Green 35, and North Green 31. In a Chi-Square test, what would the sum (total) of the EXPECTED values/frequencies be for East Green and South Green? (Hint:First calculate the expected values/frequencies for each

Can I get answer to this statistic problem in the picture. 13. A thief steals and ATM card and must guess the correct three- digit code from an 8-key pad. Repetition of digits is allowed. What is the probability of a correct guess on the first try? (10 moleus a sidem of ensig oleum youinneo To nal Alet ohsaidmoo Insistlib yuan woll .conce offoval
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Question 3 3.1 HiFi Corp has recorded the number of TVs sold each week and the number of advertisements placed weekly in The Namibian Newspaper for a period of 12 weeks. The data is presented in the table below. a) Find the straight-line regression equation to estimate the number of flat-screen TVs that HiFi Corp can expect to sell each week,

x 30 40 50 60 70 ______________________ y 137 124 122 116 99 The least-squares regression line, = ___x+___

Use the students t distribution to find tc for a 0.95 confidence level when the sample is 18. (Round 3 decimal places)

x 5 6 7 8 10 ______________ y 7 9 8 12 17 Determine theleast-squares regression line. = ___x+(___)

East Meadow is a suburban New York community. A real-estate company gathers data on appraised values of single-family houses (recorded in thousands of dollars) based on the age of the house, whether or not it has a fireplace, and whether or not it has a finished basement. The table below shows a regression model relating a house's value to the

Calculate the test statistic, decide whether to reject/ fail to reject null hypothesis, and select correct choices for e) there (is/ is not enough) evidence at the 10% level of significance to conclude that the aspect of career development that is considered to be most important (differs from expected/ is independent of age/ is dependent on age/
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Thank you!! A random sample om] = 21 securities in EconomyA produced mean returns of X 1 = 5.8% with S1 = 2.5% while another random sample of 11; = 16 securities in Economy 3 produced mean returns of X 2 = 4.6% with S2 = 2.2%. At (X = 0.01, can we infer that the returns differ significantly between the two economies? Assume that the samples are
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What is the difference between the pulse rate of 33 33 beats per minute and the mean pulse rate of thefemales? b. How many standard deviations is that[the difference found in part(a)]? c. Convert the pulse rate of 33 33 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between minus 2 and 2 to be neither

he numbers of sick days taken per year by employees at Eureka Inc. are summarized below. Number of days Frequency 0-4120 5 - 980 10 - 1420 15 - 2910 What percentage of employees take more than 10 or more sick days in a year? (1 point) Select one: a.50% b.There is insufficient information to answer this question. c.47.83% d.13.04%

To determine if a new medication reduces headache pain, some patients are given the new medication and others are given a placebo. The paint level of patients are then recorded. Is this a cross sectional study, a retrospective study, or a prospective study?

(i) Obtain the trend projection with regression forecast. The forecast for week 13 is 744 . (Enter your response rounded to the nearest whole number.) Specify the mean absolute deviation (MAD) and mean absolute percent error (MAPE). (Enter your responses rounded to two decimal places.) MAD MAPE 30.30' 4.47 % (ii) Obtain the exponential smoothing
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Explanation isn't needed unless you really want to explain. Just checking to see how I did. What does the following graph suggest? Anxiety Level 40 35 30 25 20 15 10 4 Scatterplot 6 Externalizing Behaviors 8 10 11
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Find two unit vectors orthogonal to both(6,4, 1)and(1, 1, 0). (smaller i -value): (larger i -value):

Problem Set 1.6: Frequencies and Percents Criterion: Identify frequencies and percents. Instructions: State whether a cumulative frequency, relative frequency, relative percent, cumulative relative frequency, or cumulative percent is most appropriate for describing the following situations. For cumulative distributions, indicate whether these

In a certaincity, the average20- to29-year old man is 69.8 inchestall, with a standard deviation of 3.0 inches, while the average20- to29-year old woman is 64.3 inchestall, with a standard deviation of 3.8 inches. Who is relativelytaller, a75-inch man or a70-inch woman? Find the correspondingz-scores. Who is relativelytaller, a75-inch man or

The net salesc for Costco are changing at the rate of c(t)=2.03t^2+11.91t6.50 billion dollars per year for 0t4 , wheret is years since January 2008. Be sure to show your work including steps. Answer questions a,b,c. a) Find the total change in Costco net sales from January2010 to January2012 b) The total net sales for Costco was71 billion dollars

Question is below: Determine whether the sequence converges or diverges. If it converges, find the limit. (If an answer does not exist, enter DNE.) an = nze- 3n lim an = 7-+ 00Determine whether the sequence converges or diverges. If it converges, find the limit. (If an answer does not exist, enter DNE.) an = In(n + 2) - In(n) lim an=
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Explain Smaldino and al objectives ABCD . Please use polynomials examples

Suppose there is a .04 probability that a male patient has bowel cancer before testing . The probability of a false-positive test is .85, and the probability of a false-negative (no indication of cancer when cancer is actually present) is .30. What is the probability that the male patient has prostate cancer if the BSA test comes back positive?

For each of the 2 majors make a frequency distribution and histogram using the column 'Annual % ROI'.Group with starting at 6% (0.06), ending at 11% (0.11), and go by 0.5% (0.005). Please properly label each chart and comment on the School Type Private Private Private Public Private Public Private Private Private Private Private Private Private
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1. Find the mean, standard deviation, median, Q1 and Q3 for the household income. Round your answers to 2 decimal places and use these rounded values for the rest of the questions. MEAN STANDARD DEVIATION MEDIAN Q1 Q3
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How can the empirical rule be restated in terms of z-scores and percentiles? Restate it for four of the seven z-scores. Hint: Use the definitions of z-score and percentile and avoid use of the phrase "standard deviation" or the numbers 68, 95, and 99.7.

In a randomly chosen lot of 1000 bolts, let X be the number that fail to meet a length specification, and let Y be the number that fail to meet a diameter specification. Assume that the joint probability mass function of X and Y is given in the following table. y Row f(x, y) 0 1 2 totals 0 0.40 0.12 0.08 0.6 x 1 0.15 0.08 0.03 0.26 2 0.1 0.03 0.01

The following frequency distribution represents the scores on a math test. Find the class midpoint of scores for the interval 40-59. Scores Number of students 50-59 2 60-69 4 70-79 6 80-89 15 90-99 5 A) 50.5 B) 49.5 C) 48.5 D) 49.0

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Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 5.8 parts/million (ppm). A researcher believes that the current ozone level is not at a normal level. The mean of 20 samples is 6.1 ppm with a variance of 1.00. Assume the population is normally distributed. A level of
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Can some please help with this question (a) Teddy] is a manufacturer of dish washing liquid. If his monthly demand function for 7'50ml size is q = 4000 250p and his total cost function is C(q) = 500 + 0.2q. (i) Derive an expression, R(q) for Teddy J's total revenue curve. (ii) Derive an expression, 11(q) for Teddy J's prot function. (iii)
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Can you please help answer: Currently Samsung ships 22.6 percent of the organic light-emitting diode (OLED) displays in the world. Let S be the event that a randomly selected OLED display was made by Samsung. (a) Find P ( S ). (Round your answer to 3 decimal places.) P ( S ) (b) Find P ( S ). (Round your answer to 3 decimal places.) P ( S ) (c)

The percentage of children ages 1 to 14 living in a single-parent home in 1985 compared to 1991 for 13 states was gathered.Part A: Determine and interpret the LSRL. (3 points)Part B: Predict the percent of children living in single-parent homes in 1991 for State 14 if the percentage in 1985 was 18.3. Show your work. (3 points)Part C: Calculate and
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Please help =) The test statistic of z = 0.97 is obtained when testing the claim that p > 0.9. a. Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed. b. Find the P-value. c. Using a significance level of a = 0.10, should we reject Ho or should we fail to reject Ho? Click here to view page 1 of the standard normal
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If there are 30 students total and 13 of them have blue socks and 17 have red socks. Randomly select a student from the class list. What is the probability of the student having red socks?

Francis and Bobby are in a heated debate over what fast food chain is better, Chick-Fil- A or Raising Cane's. They decide to end their debate by surveying people on the street to see which fast food chain people prefer. They come to an agreement and hypothesize that there will be a difference in preference between the two fast food chains. In the

Estimate the area under the graph of f ( x ) =10cos( x )from x = 0 to x = /2 using four approximating rectangles and left endpoints. (Round your answers to four decimal places.) R 4 =

If you have a raw score of 40, a mean of 50 and a standard deviation of 5. What is the z score, t score, and percentile rank?

Unit 2 Learning Activity 2: Domain and Range (1) In your math journal summarize the meanings of the domain and range of a graph, how to determine domain and range from a graph vs. from an equation, and how domain and range can change when describing a real-life situation. (2) The required content, written by you, would go here. (3) Evidence of
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At what values of x does cosx=10x? (Newtons Method)

Beer bottles are filled so that they contain an average of 440 ml of beer in each bottle. Suppose that the amount of beer in a bottle is normally distributed with a standard deviation of 8 ml. a. What is the probability that a randomly selected bottle will have less than 437 ml of beer? b. What is the probability that a randomly selected 6-pack of

A jazz concert brought in $ 162,500 on the sale of 7,900 tickets. If the tickets sold for $15 and $ 25 each, how many of each type of ticket were sold? The number of $ 15 tickets is ____ ? The number of $ 25 tickets is _____? ****please explain the solution*** thank you

1. Consider the following characteristics of a query submitted to an IR system: e A query was submitted to an IR system with a collection containing 40 total documents. e Eleven (11) of the documents in the collection were relevant to the query. e The IR system retrieved 12 total documents. The first 4 were relevant. The next 3 were not relevant.
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Problem #1 (20 points) Consider the points (0, 0) and (7, 9) in the my plane and suppose in traveling from (0, 0) to (7, 9), only the steps R (my) * (I +1,y) and U: (mug) * (any + 1) are allowed. a.) (3 points) Compute the total number of possible paths from (0,0) to (7,9) using only the steps R (to the right) and U (up). b.) (7 points) Compute
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Consider that the creatinine level (measured in continuous scale) of patients with type 2 diabetes mellitus follows the normal distribution. If you construct a sampling distribution of sample mean for small samples, what would be its distribution

52. The number of cars arriving at a toll booth in ve-minute intervals is Poisson distributed with a mean of 3 oars arriving in ve-minute time intervals. The probability of 5 cars arriving over a ve-minute interval is
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