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Mathematics Questions and Answers April 27, 2022

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I have a question and I don't understand how the number is used as a new value and not a reference value. Can you explain? "English majors spend an average of $120 per course on books. Humanities majors spend an average of $50 per course on books. What is the percent difference between the two amounts relative to the amount for humanities majors?"

Make the minimum X value on the X axis to be 800 and y axis min = 60 to see the points more clearly. Interpret the slope and r-squared values. Predict the value for IQ when volume = 1253. \f
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Hi, if anyone could help me out with this question thanks. Q) The following histogram represents data giving 16 estimates for the acceleration due to gravity (9) obtained from an experiment using the free fall method. It was produced using a histogram start value of 9.75 m/s2 and an interval of 0.025 m/s2. Free fall Frequency 5 4 3 - 2 1 0 - 9.75
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Which location would have the longest period of daylight on November 25? ANSWER Unselected Varna, Bulgaria (43 12'N, 27 55'E) Unselected Fairbanks, Alaska (64 50'N, 147 43'W) Unselected Yakutsk, Russia (62 2'N, 129 44'E) Unselected Deseado, Argentina (47 17'S, 68 21'W) Unselected Manaus, Brazil (3 6'S, 60 2'W)

A rectangular piece of cardboard measuring 24 inches by 30 inches is to be made into a box with an open-top by cutting equal size squares from each corner and folding up the sides. Let x represent the length of a side of each such square. What is the maximum volume of this box? If necessary, round to 2 decimal places.

what is the formula for calculating the shipping cost in the table

You are a nurse in the Neonatal Intensive Care area who has noted that babies whose mothers lack prenatal care seem to end up with a low birth weight. You have decided to look at this phenomenon in your unit and found the following results: LBW Yes No Total Lack Prenatal Care Yes 75 175 250 No 20 180 200 Total 95 355 450 Calculate the probability

To properly collect samples of possible accelerants at a scene one must? Group of answer choices Take samples of material from the highest point of the fire Find the origin of the fire and take a sample there and take a sample where it appears no accelerant was used. Samples can be taken anywhere the fire spread

A manager of a car rental chain was interested in investigating if there is a relationship between monthly labor hours and the number of cars rented.The officer randomly selected 17 of the car rental locations in the chain across the country and recorded, for each of these car rental locations the monthly labor hours required during the month of
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Suppose we have a binomial experiment in which success is defined to be a particular quality or attribute that interests us. (a)Suppose n =33and p =0.27.(For each answer, enter a number. Use 2 decimal places.) n p = n q = Can we approximate p by a normal distribution? Why? (Fill in the blank. There are four answer blanks. A blank is represented by

Use the information to solve the equation: Decide from the graph whether each limit exists. If a limit exists, estimate its value. Tim F() lim F(x) X-+4 What is the value of the limit? Select the correct choice below and fill in any answer boxes in your choice. 4- O A. lim F(x)= -4- (Type an integer or a simplified fraction.) O B. The limit does
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You have two groups of people: 69 people who live in the city and 48 people who live in the country. You are studying rates of fentanyl addiction and find that 9 people in your city group are addicted and 3 people in your country group are addicted. (a) According to your sample, what are the odds of a person in the city group being addicted? Enter

Orange - 5 Yellow - 4 Black - 2 White - 3 Brown - 2 If a random piece was chosen from a box, what is the probability that the selected color would be white

Test the hypotheses of the difference in population means by using the following data. Test the following hypotheses of the difference in population means by using the following data (a = .10) Ho: M1- M2=0, Ha: M1- M2
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during a certain week the mean price of gasoline in California was $2.999 per gallon. a random sample of 38 gas stations is drawn from this population. what is the probability that the mean price for the sample was between $3.010 and $3.025 that week; assume standard deviation is $0.049

Please show work on the paper for me easier to understand.Thank You 1:08 PM Thu Jun 13 . . . 90%
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Discuss and explain why sampling permits us to make inferences about populations.

Linear Regression Equation: Parameter Estimate Intercept -0.3567 Slope (explanatory ) 4.034 Model Summary: Statistic Value Correlation Coefficient r 0.804 Coefficient of Determination r2 64.7% Residual Standard Deviation 1.452Descriptive Statistics: Variable n Mean Std. Dev. Min. Q1 Median Q3 Max. response 144 10.63 2.43 6.30 8.95 10.10 12.12

why is matching uncommon when usuing the within-subjects F

A setting event for a problem behavior: Group of answer choices Sets the occasion for adaptive behavior A discriminative Stimulus A consequence that increases the future probability of a behavior. Increases the probability that an Sd will be followed by a problem behavior

A pet supplier has a stock of parakeets of which 30% are blue parakeets. A pet store orders 3 parakeets from this supplier. If the supplier selects the parakeets at random, what is the chance that the pet store gets two or more blue parakeets?

Find the number of subsets of the given set. A restaurant provides a brunch where the omelets are individually prepared. Each guest is allowed to choose from 10 different ingredients. (a) How many different types of omelets can the restaurant prepare? 1024 omelets (b) What is the minimum number of ingredients that must be available if the

What is the mean,median, mode and midrange of these data? to 3643 km 2264 miles Europa 3122 1940 Ganymede 5262 3270 Callisto 4821 2996

Are you likely to purchase an item promoted by a celebrity on Social Media? Are you likely to purchase an item promoted by a celebrity on a social media site? According to a survey, 27% of social media users have made such a purchase. Complete parts (a) through (d) below. social media site. a. Suppose that the survey had a sample size of n - 800.
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What is the probability of a value from a normal distribution falling between 3.30 standard deviations above the mean and .5 standard deviations above the mean? (Round calculations to nearest thousandth (3 digits))

Exercise 9: A sample of colored candies was obtained to determine the weights of different colors. The ANOVA table is shown below. It is known that the population distributions are approximately normal and the variances do not differ greatly. Use a 0.05 significance level to test the claim that the mean weight of different colored candies is the

Uniformes: Genera 500 nmeros aleatorios uniformemente distribuidos entre 15.5 y 72.6. Genera la grfica de frecuencia con k=9 clases y determina visualmente si los nmeros poseen las caractersticas de una distribucin uniforme. Para la generacin debers usar la siguiente frmula en EXCEL: =REDONDEAR.MAS(15.5 + ALEATORIO()*(72.6 - 15.5), 1) Usando EXCEL

A probability experiment consists of rolling a twelve -sided die and spinning the spinner shown at the right. The spinner is equally likely to land on each color. Use a tree diagram to find the probability of the given event. Then tell whether the event can be considered unusual. (yellow, red, green, blue) Event: rolling a 2 and the spinner

Week 8 Instructions: - Do your homework in RStudio. Start with a new notebook file in the source window. Create only one notebook file. Compile the results into an HTML file. Upload only one HTML file. Please do not email your homework to the professor. Data: - Use the Salaries data in the car package. See the appendix for a complete description
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In simple linear regression, when B is not significantly different from zero we conclude that: there is no linear relationship between X and Y the relationship between X and Y is quadratic there is no relationship between X and Y X is a good predictor of Y

Last year, 6% of newborn babies failed their first hearing screening. In a random sample of 150 newborn babies, find the probability that at least 11 failed their first hearing screening.

Pregunta 9 0.5 puntos Postal regulations specify that a parcel sent by parcel post may have a combined length and girth of no more than 167 inches. Find the diamension of a cylendrical package of greatest volume that can be sent throught the mail. What is the volume of such a package? Hint: The length plus the grith is 2ur+/. 167 A 167 4,657,463 3
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There is only one whole number solution between0 and 11 of the congruence equation (x 2 +3x + 7) congruence 2 mod 11. What is the value of x to make the equation true.

For Time Series D, is it reasonable to assume the data are stationary? If not, how would you recommend coercing the data to being stationary

Using the frequency distribution below, determine the first class midpoint. Age Frequency 11 - 18 1 19 - 26 4 27 - 34 5 35 - 42 4 43 - 50 2

A computer system uses passwords constructed from the 26 letters (a-z, lowercase only) or 10 integers (0-9).If a 6 character password is randomly selected, find the probability that it consists only of lower case letters or contains exactly 1 lower case m. (a) (b) (c) (d) (e) .2598.2867.1267.3412.1361

Researchers measured the trait of openness to experience (on a standardized numerical scale) for a group of college freshmen. Then, they measured the trait for the same group of students when they were college seniors. They were interested in whether there was an average difference in the scores. Which statistical analysis should be performed to

The manager of a company suspects that the production of gadgets varies depending on the shift in which it is produced. It measures production according to the work shift: day shift, evening shift and night shift. He takes this measurement every day for 30 days. For the day shift, the number of gadgets over 30 days is: 141, 155, 147, 178, 135,

five number summary and find the interquartile range 8,12,32,6,27,19, 54

I want to ask how to find a particular function in order to use absolute inequalities in the question below (to apply Sandwich theorem)? ?Can someone provide tips for me to solve this kind of Sandwich theorem related questions?thanks. \f
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Please answer the question below using excel and include the excel solution file not just screen shots \f
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Find c and d so that f(x)= cd 3 + dx 2 + 1 has a point of inflection at (-1, 2)

4. Describe the difference between causation and correlation.How does a correlationalmeasurement demonstrate the strength of the relationship between variables?Provide examples of both a negative and a positive correlation, usingpatient satisfaction scores as one of the variables

Performance objectives describe: Group of answer choices expected student learning. what is expected of the teacher when presenting lessons to children. the detailed steps of a mathematics lesson. what students plan to work on in groups

A survey by Pew Research Center asked a random sample of adult Americans whether it would be hard to give up social media. The survey results by age groups is given below. 3) A survey by Pew Research Center asked a random sample of adult Americans whether it would be hard to give up social media. The survey results by age groups is given below.
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Do you know how to answer the question below? Details below Thank you 2. Find an equation of the line through (2 , -5) parallel to 2x - y = -4. Write it in the form ax + by = c where a, b, and c are integers with no common factor other than 1 or -1 to all three and a 2 0
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Commonly used techniques of presenting and organizing statistical data include which of the following? (Choose all that apply) Question 13 Select one or more: a. Graphical displays b. Descriptive statistics c. Frequency distributions d. Summary charts

Grouping people by their political party membership constitutes data of what scale? Group of answer choices Nominal Ordinal Interval Ratio

9.4.48 The average price for a theater ticket in a certain city in 2017 was $114.36. A random sample of 26 theater ticket prices in the city in 2018 had a sample mean of $120.07 with a standard deviation of $43.34. Yes, all of the conditions have been met. -Do we have evidence that theater ticket prices in the city changed from the 2017price? Use

Question 2 The question was: A doctor at a walk-in clinic is studying high blood pressure among patients of the ages twenty to forty. According to the American Heart Association, a person has high blood pressure if their Systolic and Diastolic readings are above 139 and 89 respectively. A random sample of 14 patients revealed the following blood

Can someone please help me with my homework is due in an hour. 1.Assume that ages of moviegoers are normally distributed with a mean of 35 years and a standard deviation of 20 years. a.What is the percentage of moviegoers who are younger than 30 years of age. b.Find ,which is the 25 th percentiles. c.Find the probability that a simple random

Can someone please help me answer this question? details below thank you Find the equilibrium quantity and the equilibrium price. 7. Suppose that the fixed cost for a product is $650 and the break-even quantity is 25. Find the marginal profit (the slope of the linear profit function)
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How do the symbiotic roles of statistics in research methods and the myriad techniques of graphical data representation converge to elevate our understanding and interpretation of complex information? What type of graphical data representation will most effectively display data characteristics? Why? Provide citations and references

Can you formulate a research discussion question or topic for each of the hypotheses listed above and based on the data

A regression analysis explores the relationship between students' study time (X) and students' grades (Y). The analysis establishes that for every one hour of studies, a student's test score is expected to increase by 3.5. The data reveal an average study time of 6 hours and an average test score of 68. What is the test score of a student with

1 point Arm span is the physical measurement of the length of an individual's arms from fingertip to fingertip. A man's arm span is approximately bell-shaped with mean of 70 inches with a standard deviation of 4.5 inches. The percent of men who have an arm span between 61 and 79 inches is type your

If you know the mean and standard deviation of a normally distributed population, and somebody asks you questions about the highest 1% and lowest 1% of numbers in that population, what could you tell them? Pick the values for the mean and standard deviation and then answer the question for those values. Choose one of these R functions to answer

Write the composite function in the form f(g(x)), [Identify the inner function u = g(x) and the outer function y = f(u).] y = cubed root (1 + 5x) (g(x), f(u) = ( ) Find the derivative dy/dx. dy/dx =

Please help! x23x4 2. (17 pts.) Consider the function g(x) : 2 4 x x (3) Determine all x-values where g(x) is not continuous. (b) Indicate and justify the type(s) of discontinuity found in part (a)
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Un chercheur se demande s'il y a une corrlation entre l'acuit visuelle (mesure sur une chelle de 1 10, o 10 reprsente une meilleure vision) et le nombre d'accidents. Il tire un chantillon alatoire et obtient les rsultats suivants : Acuit visuelle Nombre d'accidents 2 6 3 6 3 5 6 4 7 4 8 3 9 4 9 3 Calculez la corrlation de Pearson. Effectuez le

Hi, I`m having issues figuring out how to calculate the expected counts. Iliad Weapons : The Iliad also reports the cause of many injuries.Here is a table summarizing those reports for the 152 injuries for which the Iliad provides that information.Is there an association? a) Under the null hypothesis, what are the expected values? Injury Site Body
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For the following frequency distribution, find the mean (accurate to 4 decimal places): Data Value Frequency 2 5 7.2 10 6 9

Understanding the correlation between individuals' attitudes toward liberals and their stance on the marriage rights of gay couples is quite significant. However, same-sex marriages were granted in June 2015 by the U.S. Supreme Court in Obergefell vs. Hodges worldwide. As marriage plays a crucial role in society, it will reduce the stigma for

1.You run a gizmo factory.Over the past year the average output of the factory is 480 gizmos and the standard deviation of that output is 10 units per day.In repeated random samples of size n = 40 days, the expected value of sample mean is: 2.In the previous question the variance of the sample mean is. 3.Using the population mean and standard

Hey! Need help with these three MC questions thanks :) QUESTION 1 A tourism agency wants to know if the mean number of days spent by Australian tourists in Hong Kong has decreased from last year when the mean was 5.4 days. Let // denote the mean number of days an Australian tourist spends in Hong Kong. Which of the following is the alternative
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Medicare spending per patient in different U.S. metropolitan areas may differ. Based on the sample data below, answer the questions that follow to determine whether the average spending in the northern region is significantly less than the average spending in the southern region at the 1 percent level. Medicare Spending per Patient (adjusted for

Determine the semi interquartile range doe the following sets of scores \f
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A random sample of 12 chemists from Washington stats shows an average salary of $39,420 with a standard deviation of $1659. A random sample of 26 chemists from New Mexico has an average salary of $30,215 with a standard deviation of $4116. Find the 98% confidence interval of the difference of means

1.Assume that you have a sample of n 1= 8 , sample mean = 42 and a sample standard deviation of S 1= 10, and you have an independent sample of n 2= 5 from another population with a sample mean = 34 and sample standard deviation S 2= 8. (a) What is the value of the pooled-variance t -test statistic? (b) In finding the critical value of the test

I need help with this question especialy the method and the result and discussion . can you verify my graphs to see if what i have done is correct i used the Spearman rank instead of using the Mann) Withney spreasheet. Could you tell me what would be best to use. And if you could look at my discussion i think they link anymore to the graphs if you
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use the integral test Use the Integral Test to determine whether the infinite series is convergent. Fill in the corresponding integrand and the value of the improper integral. Enter inf for 00, -inf for 00, and DNE if the limit does not exist. Compare with [1: W 7 7 V N 7 (ix: By the Integral Test, 0 2 n the infinite series E 9 n=10 (n3 + 5)5 (Q
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Question 1 (1 point) Listen a What is the difference between a research question and a research hypothesis? 12 Usually research questions are more vague than hypotheses None of the other choices Usually research questions are exactly the same as research hypotheses Usually research questions are more precise than hypotheses Question 2 (1 point)
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A manufacturer of automatic washers provides a particular model in one of three colors.Of the first 1000 washers sold it is noted that 400 were of the first color.Can you conclude that less than one third of all the customers have a preference for this color?Conduct the test with a significance level of 0.05.

3 Not yet answered Marked out of 4.00 MCQ A summary measure that is computed to describe a characteristic from only a sample of the population is called: Question 3Answer a. population b. a statistic c. a parameter d. a census

1.In the certain data set, n=100 with k=1 predictor, and an alpha of 0.05. The value of the Durbin-Watson Test Statistic (D) = 1.32. Use the Durbin-Watson Table to find dLand dU, and then make a final decision about Autocorrelation. Is there positive autocorrelation? A.) No, the test is inconclusive because dL

I am a sports management major. I want to check if the variance of missed free-throws has changed within a basketball team. I would find a historical record of past variance. Null Hypothesis Mean 0 (new) Mean 1 (Historicial record) Alternative Hypothesis Mean 0 (New) > Mean 1 (Historical Record) Null Hypothesis: The variance of missed free throws

In a seasonal-growth model, a periodic function of time is introduced to account for seasonal variations in the rate of growth. Such variations could, for example, be caused by seasonal changes in the availability of food. (a) Find the solution of the seasonal-growth model where k , r , and are positive constants. dP/dt = kP cos( rt ) P (0) = P 0

during a certain week the mean price of gasoline in the New England region was $2.714 per gallon. a random sample of 32 gas stations is drawn from this population. what is the probability that the mean price for the sample was between $2.695 and $2.725 that week; assume standard deviation is $0.045

Can someone please help me answer this question? details below thank you 8 A company is manufacturing a new dietary supplement pill that promotes body fat reduction. a The company will supply 60 pills for a price of $40, and will supply $100 pills for a price of $60. Determine the linear supply function, p = S(q), for this product. b. The demand
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Think about a population mean that you may be interested in and propose a confidence interval problem for this parameter. You then would choose to calculate a 95% (or another level) confidence interval for the population mean.

Answer questions 7-14 Find the length of each arc. Round your answers to the nearest tenth. 7) 8) 3 13 cm 5 cm 285 270 Find the lateral area of each figure. Round your answers to the nearest hundredth, if necessary. 10) 12 km 5 km 11 km 12 km 10.4 km 0 1021 Kuta Software LLC . All rights reserve 27 Made with Infinite Geometry. Find the surface
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To graph a hypothesized 2 2 interaction effect, you must include two nonparallel lines. Group of answer choices True False

Consider Shasta Faculty Practice. Consider the internal medicine clinic. Based on our initial assumptions, the scenario that results in the highest APP contribution is assists/works alone mix of 50% replaces a physician acts independently

please answer two question in the picture Use Stokes' Theorem to evaluate F . dr where C is oriented counterclockwise as viewed from above. c F(x, y, z) = yzi + 6xzj + exyk, C is the circle x2 + y2 = 4, z = 7.Use the Divergence Theorem to calculate the surface integral j] F - dS; that is, calculate the flux of F across 5. 5 F(x, y, z) = 3xy2i +
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You desire to conduct a study of first degree murderers in American prisons.A preliminary study reveals that the mean IQ of a random sample of 156 first degree murderers is 80, with a standard deviation of 24.Perform a 95% confidence interval on the mean IQ of first degree murderers, and provide the interval.What exactly does this confidence

twentysix) An important application of regression in manfacturing is the estimation of cost of production. Based on the attached data cost (Y) to volume (X), what is the cost per widget? Costs 5424\\\\\ 5657\\\\5759\\\\7294\\\\7583\\\\8603\\\\5311\\\\6093\\\\6662\\\\7380\\\\7784\\\\8588 volume

Can drawing conclusions about causation from these studies be justified? Why or why not? Original Ego Non-Ego Total Replication Ego Non-Ego Total High Power 8 16 24 High Power 22 48 70 Low Power 4 29 33 Low Power 18 53 71 Total 12 45 57 Total 40 101 141
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Find the derivative of the function. y =[ (x squared +1) / x squared -1) ] all to the 6 power y' =

According to a Gallup poll conducted in 2020, 47% of Americans said they belonged to a church, synagogue or mosque. Assume that I randomly surveyed 17 adults and ask them if they belonged to a church, synagogue or mosque. What is the probability that exactly 4 out of the 17 adults belonged to a church, synagogue or mosque? Round your answer to the

1 of 11 A fair die is rolled 12 times. Consider the following three possible outcomes: ) 654321654321 ) 111111111111 ) 362154251643 Which of the following is true? The three outcomes are equally likely. It is absolutely impossible to get sequence (ii). is more likely than (ii) ( ) is more likely than () or (). Both (C) and (D) are true

please I need help solving this practice question Q2.(10) A survey about the number of new students in each college in Ontario was done. The frequency table is listed below. New students Frequency Relative Frequency 200 300 400 0.25 500 0.15 600 0.1 1.(2) Fill all the blanks in the above table. 2.(4) Calculate the sample mean, and sample variance
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GDOT wants to research whether or not to change the speed limit on 285. In a sample of 40 cars, the average speed was 72.4 mph with a standard deviation of 4.8 mph. Build a 90% confidence interval for the mean speed of cars on 285. What is the point estimate? Question 5 options: 285 72.4 40 90

SAN JAMAR Start . safe . piracy Short answer problem #4 The Pepsi Challenge asks individuals to indicate their preference for Coke or Pepsi after a taste test, A marketer was interested in knowing whether there was a difference between men and women in the preferences for Coke or Pepsi. The basic results of the Pepsi Challenge c were as follows:
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Refer to the technology output given to the right that results from measured hemoglobin levels(g/dL) in 100 100 randomly selected adult females. The confidence level of 95 95% was used. a. Express the confidence interval in the format that uses the"less than" symbol. Assume that the original listed data use two decimalplaces, and round the

You are thinking about opening up a Starbucks in your area but what to know if it is a good investment.How much money do Starbucks actually make in a year?You collect data to, to help estimate Annual Net Sales, in thousands, of dollars to know how much money you will be making. You collect data on 27 stores to help make your decision. x1 = Rent in
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A group of 5 women and 10 men are going to form a committee of 6. (a) How many such committees can be formed? (b) How many will have exactly 2 men? (c) How many will have no women? (d) If a committee is selected at random, what is the probability that it has exactly 2 men?

The one-sample t statistic for a test of H 0 : = 15 vs. H a : < 15 based on n = 11 observations has the test statistic value of t = 1.87. What is the p -value for this test? a) 0.954 b) 0.046 c) 0.091 d) 0.346 e) 0.000

A large grocery store needs to decide how many bottles of 2 liter Dr. Pepper to stock each week in the store. The store must decide how many bottles to stock each week. The weekly demand for 2 liter Dr. Pepper follows a Normal Distribution with a mean of 550 bottles and a standard deviation of 26 bottles. The store desires that the probability

how to solve question 1 Given that F(x, y,z) = xyi +(2yz+x ) j+(2z + y ) k and D is the solid formed by the paraboloid z= x' + y' for which as z sb where a > 0 and b>0. (i) Evaluate V-F dV in terms of a and b, in the simplest form. (14 marks) (ii) Hence, if given that V-F dV =768x and b = 9a, find the value of a +b. (6 marks)
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A standard die is rolled. Find the probability that the number rolled is less than6 . Express your answer as a fraction in lowest terms or a decimal rounded to the nearest millionth.

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