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Mathematics Questions and Answers March 29, 2023

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1- As a store manger you would like to find out the average time it takes to unload the truck which delivers the merchandise for your store. For this purpose, you have taken a random sample of 35 days and found the average unload time to be 263 minutes for the sample. You also found that the standard deviation is 45 minutes for the sample. Find

Given that X is a binomial random variable with very large n , the binomial probability P ( X 8) is approximated by the area under a normal curve to the right of

1.Suppose that the average pop song length in America is 4 minutes with a standard deviation of 1.25 minutes. It is known that song length is not normally distributed. Suppose a random sample of 25 songs is taken from the population. Show your work for a full credit. a.What is the approximate probability that the average song length will be less

Consider a sample with six observations of 7, 10, 6, 13, 16, and 14. Compute the z -scores for each sample observation. (Leave no cells blank - be certain to enter "0" wherever required. Round your answers to 2 decimal places. Negative values should be indicated by a minus sign.

The Taste Delight Bakery produces q large chocolate cakes at a cost of $11.38 each and sells (q-3) of them for $21.00 each. The other three cakes are used for display purposes then donated to a charity food bank. The bakery has fixed costs of $2108 per week for rent and $1547 for labour. How many chocolate cakes must it produce per week to break

A sample of 20 Loyola students is taken, four of whom (4/20 = 20%) say they study at least 35 hours per week during the academic year. At most state universities, the proportion of students who report studying at least 35 hours a week is 10%. We wish to see if the Loyola sample provides strong evidence that the true proportion of Loyola students

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An urn contains seven red balls, seven white balls, and seven blue balls, and sample of five balls is drawn at random without replacement. Compute the probability that all of the balls in the sample are the same color. (Round your answer to four decimal places.)

Please see the attaching images about the question. 2. Applying rejection sampling. Consider the target pdf: 5'0 1 . : : : . : . : - ' 06.00.1 0.20.3 0.4 0.5 0.6 0.7 0.8 0.9' 1.0 The following samples are generated iid from an uniform distribution: 0.8235, 0.4387, 0.6948, 0.3816, 0.3171, 0.7655, 0.9502, 0.7952, 0.0344, 0.1869. a. Use the samples
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The following table lists six pairs ofx andy values.x 5 17 24 8 12 20 y 12 6 13 7 10 9 Calculate the value of the following: x 2 =

Set 9 Econ 435 - Financial Economics University of Michigan Winter 2017 Due date: Thursday, March 30 - Friday, March 31. Problem sets must be submitted in your discussion section. Please do the following exercises contained in BDM (Berk, Jonathan & Peter DeMarzo, Corporate finance, Third edition, 2014, Pearson): Chapter 14: Exercises 17, 22,

A solution consisting of 220mg of dopamine in 100nL of solution is administered at a rate of 10ml/hr. Complete parts below: A) What is the flow rate in mg of dopamine per hour? B) If a patient is prescribed to receive 132 mg of dopamine, how long should the infusion last?

Beginning with a set of raw scores with N = 10, use SPSS to demonstrate that the mean of the z transformed values equals 0 and the standard deviation equals 1. (We have not provided a solution for this problem).

A physician is currently interested in a new test to identify the presence of skin cancer. Below is a table representing his results after testing on 1000 patients. What is the sensitivity of the test? What is the specificity of the test? \f
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Stat Project 1 All submissions should be in the form of a single Word document where appropriate, but all of the Excel portions of the assignment should be sent as Excel attachments. 1. Excel Project: Apple's recent mission to reduce its carbon- footprint led the company to purchase solar panels, and locate two potential building sites. Because

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8 An electronics firm produces two models of pocket calculators: the A-100 (A) and the B-200 (B). Each model uses one circuit board, of which there are only 2,500 available for this week's production. In addition, the company has allocated a maximum of 800 hours of assembly time this week for producing these calculators. Each A-100 requires 15

Discussion #3 What is the purpose of data visualization, and how do the images below potentially miss that mark? (Choose one, and evaluate it in a clear and reasonable manner, using Neil J. Salkind's text as your main source of reference.) Graph 1 Graph 2 Graph 3

A survey found that the American family generates an average of 17.2 pounds of glass garbage each year. Assume the standard deviation of the distribution is 2.5 pounds. Find the probability that the mean of a sample of 37 families will be between 16.5 and 17.5 pounds. Assume that the sample is taken from a large population and the correction

How much would you charge for more help. Look at document I sent. I just need the numebers put in on the document.

1.SamSteward is a freelance Web page designer. His yearly wages for the years 2009through 2014 are listed below. An industry index for computer programmers thatreports the rate of wage inflation in the industry is also included. This indexhas a base of 1998. Year Wage ($ thousands) Index (1998 = 100) 2009 $175 148.3 2010 175 140.6 2011 150 120.9

Decide weather the random variable x is discrete or continuous. X represents the total number of die rolls required for an individual to roll a five

A free-style drink dispenser can be controlled so an average of milliliters per container is released. Let us state that the ounces of what is released are symmetrically distributed (SD = .40 ml). In this case, what value should the population mean, , be controlled at so 6-ml cups will spill over the top only 2% of the time?

Please discuss the purpose of hypothesis testing. In your response, provide an example of a null hypothesis and alternative hypothesis. Why is hypothesis testing important for researchers?

The following are the lengths of stay (in days) for a random sample of 19 patients discharged from a particular hospital: 13,9,5,11,6,3,12,10,11,7,3,9,5,2,2,10,10,10,12 Draw the histogram for these data using an initial class boundary of 1.5 and a class width 2 of . Note that you can add or remove classes from the figure. Label each class with its

Chapter 9 Activity Mission: You're really impressing them now. The newest idea is that the virus is related to age. To investigate this, each subject was given a virus score and their ages were recorded. These values are in the file \"Chapter 9 Activity.\" 1. Create a scatterplot of the data. What is the relationship between age and virus score,

Unit 5 Prob 1 Two Sample Hypothesis Test for the Mean (Independent Samples) Level of Significance Sample Mean Sample Size Sample Standard Deviation 0 #DIV/0! 0 #DIV/0! Standard Error (Computed) Test Statistic (Computed) #DIV/0! #DIV/0! Two-Tailed Test H1: (m1 m1) 0 #DIV/0! 0 #DIV/0! Lower Crit Value Upper Crit Value p-Value Decision Err:502

4.Suppose that 48 people report their weekly earnings to an accountant.Let the five-number summary be as follows:400, 550, 600, 760, 925.Assume that no two people earn the same amount of money per week. In our survey, 25% of the people earned less than what amount?

Chapter 5 Elementary Statistics The National Center for Health Statistics keeps records of many health-related aspects of people, including the birth weights of all babies born in the United States. The birth weight of a baby is related to its gestation period (the time between conception and birth). For a given gestation period, the birth weights

A federal bank examiner is interested in estimating the mean outstanding defaulted loans balance of all defaulted loans over the last three years. A random sample of 2 0 defaulted loans yielded a mean of $ 6 7 , 9 1 8 with a standard deviation of $ 1 6 , 5 5 2 . 4 0 . Fill in Multiple Blanks A 9 0 % confidence interval for the mean balance of

Technology is needed to complete the question. Thank you in advance The tollowing table shows the hot dogs bought from a street vendor over the course of eight days (\"Demand"). Also shown is the temperature for each day in degrees Celsius. Temperamre[(:)j22|11|24|n| 9 |i4|18j2i|q1 Demand j46|28|36|39|18|21|41j34| A linear regression on the data
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I need a research article on the concept How does APN practice demonstrate cost-effectiveness, reduction in errors and misuse or overuse of services?

Please provide all of the work with all steps so I can understand how the problem is worked. a hospital administration have recently received an internal audit report indicating that 15% of all patient bills contain an error of one form or another. after spending considerable effort to improve the hospital's billing process, the administrators are

Hello i have a question that needs to be answered as soon as possible thank you. i have attached an file for the question.Thank you! Use Lechnuiogy lo (a) construct arid graph 3 pmbabiiily distn'bulion and (b) describe ii: shape The number ei compulers per nuuseneid in a small Iuwn Cumpulers o 1 2 3 Huuseholds 301 233 95 15 (a) Construcl the
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A political pollster is conducting an analysis of sample results in order to make predictions on election night. Assuming atwo-candidate election, if a specific candidate receives at least 54 % of the vote in thesample, that candidate will be forecast as the winner of the election. You select a random sample of 100 voters. Complete parts(a)

Court Common Pleas Judge Peter Tom Angela M. Mazzarelli Richard T. Andrias David Friedman John W. Sweeny Jr. Rolando T. Acosta David B. Saxe Karla Moskowitz Dianne T. Renwick Leland G. DeGrasse Helen E. Freedman Rosalyn H. Richter Sallie Manzanet-Daniels Paul G. Feinman Judith J. Gische Darcel D. Clark Total Domestic Relations John A. Lahtinen

Same-sex unions have increasingly become a heated political issue. The 2010 GSS asked respondents' opinions on homosexual relations. Four response categories ranged from "Always Wrong" to "Not Wrong at All." Calculate the median for this variable. In general, how would you characterize the public's attitude about homosexual relations? Frequency

Given that x has a Poisson distribution with m= 1.2 , what is the probability that x= 1:_______ 2. The total cholesterol levels of a sample of men aged35-44 are normally distributed with a mean of 200 milligrams per deciliter and a standard deviation of 38.8 mg per deciliter (a) What percent of the men have a total cholesterol level less than 227

1 A random number generator is set to produce any real number between 0 and 15 and it is uniformly distributed. What is the probability that a sample average of 13 numbers produce an average less than 4? Round answer to the ten-thousands place. ________ 2 A second grade teacher gives students prizes for participating in a geography

All measurement processes have variation. Is this true or false

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Kim wants to consolidate three debts because administration will be easier.The amounts were originally due to be repaid as follows: \f
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Trying to understand which statement is not true for a histogram. Which statement is NOT true eheut the hietegrem? SEIEE'E DH E: G e. THE- hiSthrl'T'l i5 elweye e nermel dietrihutien. [:3 b. The histogram can shew the shape ef your date set. \":3 c. The histngram is a 1wiewsil picture afvariability. G d. THE hietegrern i5 semetirnee rEfErrEd ID 35
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b) A researcher wants to find if there is a relationship between annual income (Y, measured in Brazilian real) and age of workers (X, measured in years) in rural Brazil. He obtained a random sample of 4900 workers, obtaining the following results from a simple bivariate regression: f: = 2088.95 + 18420.56 =1 X.- (780.80) (1076.01) R2 = 0.05 Where
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In the Journal of Marketing Research (November 1996), Gupta studied the extent to which the purchase behavior of scanner panels is representative of overall brand preferences. A scanner panel is a sample of households whose purchase data are recorded when a magnetic identification card is presented at a store checkout. The table below gives peanut

A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers. To determine this estimate, the publisher takes a random sample of 15 people and obtains the results below. From past studies, the publisher assumes is 2.2 minutes and that the population of times is normally distributed. 9 12 12 8 12 12 6 11 10

mm from repeated trials. An investor considers the use of a Binomial random variable to model the number of days (per week) on which the price of S&P500 is higher than that of the previous business day. There are 5 business days per week. The investor thinks that using a Binomial distribution with n = 5 would be appropriate for this modeling
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ONLY FOR EXPERT_VRINDA. ONLY FOR EXPERT_VRINDA. ONLY FOR EXPERT_VRINDA. ONLY FOR EXPERT_VRINDA.

The table to the right shows the results of a survey in which 400 adults from the East, 400 adults from the South, 400 adults from the Midwest, and 400 adults from the West were asked if traffic congestion is a serious problem. Complete parts (a) and (b) Adults who say that traffic congestion is a serious problem East 37% South 31% Midwest 25%

A random variable X is normally distributed with a mean of 100 and a variance of 100, and a random variable Y is normally distributed with a mean of 190 and a variance of 361. The random variables have a correlation coefficient equal to -0.5. Find the mean and variance of the random variable below. W = 3X - 2Y

Consider the data set below. The estimated regression equation is= 30.33 - 1.88 x . Estimate the standard deviation ofpwhen x = 3 (to 3 decimals). Develop a 95% confidence interval for the expected value of y when x = 3 (to 2 decimals). (,) Estimate the standard deviation of an individual value of y when x = 3 (to 2 decimals). Develop a 95%

A textbook search committee is considering 10 books for possible adoption. The committee has decided to select 6 of the 10 for further consideration. In how many ways can it doso?

Homes sold recently in Mid City Home 7 11 12 14 17 19 20 24 25 30 31 32 33 34 44 45 50 51 56 57 66 71 78 81 82 83 86 88 95 96 98 100 104 108 109 113 114 117 119 123 124 125 Price $758,000 $662,500 $615,000 $631,500 $735,500 $557,000 $836,000 $530,500 $782,000 $940,000 $910,000 $561,500 $675,000 $698,000 $770,000 $832,500 $537,500 $755,500 $628,500

Assuming that the 30% figure still holds, what is the probability of randomly sampling 25 consumers and having 12 or more respond that they have a high level of concern about the safety of the food they eat? I am not sure if I am doing this question correct. This is all I have so far... n=25 p=.30 x = P(X>or=12)

Of a random sample of 172 elementary school educators, 118 said that parental support was the most important source of a childs success. Test the hypothesis that parental support is the most important source of a childs success for at least 75% of elementary school educators against the alternative that the population percentage is less than 75%.

Find the area enclosed by one loop of the lemniscate with equation r^ 2 = 16 cos 2 shown in the figure. Choose your limits of integration carefully. With r 0 = 4

Find the critical value z Subscript alpha divided by z/2 that corresponds to a98% confidence level.

d5f7ba96115cdbe9cb34ae445fb3f3a8fc91bbfc ModelYear MfrName 2017 aston martin 2017 aston martin 2017 aston martin 2017 aston martin 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW 2017 BMW

A survey of 427 citizens found that 304 of them favor a new bill introduced by the city. We want t find a 95% confidence interval for the true proportion of the population who favor the bill. What is the lower limit of the interval? (Round to 3 decimal digits). Use the 68-95-99% rule or use the Z table.

Can someone help me with my stat problem please? Handwriting. for the percentage of handwriting samples written by females correctly identified by a collection of 203 students at clarke university Note: the boxplot includes six minor outliers. Find a 85% confidence interval for the mean percentage of handwriting sample by females that would be

The MiniMart sells five different types of teddy bears. The manager reports that the five types are equally popular. Suppose that a sample of 500 purchases yields observed counts for types 1, 2, 3, 4, and 5 shown as the table below. \f
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For which of the following Pearson correlations would the data points be clustered most closely around a straight line? r = -0.10 r = +0.40 r = -0.70 There is no relationship between the correlation and how close the points are to a straight line

What is your statistical decision if you test the null hypothesis at the 0.10 level of significance, your p-value is 0.0456, is two-tail and the Zstat = +2.00? Please show work and explain. Thank you.

In a certain country, total alcoholic beverage sales are reported throughout the year. Sales were reported as $ 111.7111.7 billion at the beginning of 20052005 and $ 137.6137.6 billion at the beginning of 20082008 . (a) Let the x-axis denote time and the y-axis denote the amount of alcohol sales (in billions). Let xequals= 00 correspond to

In your textbook, you learned about several commonly used mixed method designs. Identify two different types of studies where a mixed methods approach would be the most advantageous to the success of a study. Which of the common mixed method do you most identify, and which one would you be less likely to implement? Explain your reasoning for both.

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Estimate the correlation coefficiant for each scatterplot. Choose from the following: -0.98,-0.85,-0.42,0.42,0.85,0.98 \f\f
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UMUC Stat Club must appoint a president, a vice president, and a treasurer. There are 12 qualified candidates. How many different ways can the officers be appointed?

On each trial of an experiment, a subject is presented with a constant soft noise, which is interrupted at some unpredictable time by a noticeably louder sound. The time it takes for the subject to react to this louder sound is recorded. The following list contains the reaction times (in milliseconds) for the 18 trials of this experiment: 296,

8 (50pts) Due 10/27 1. (This is also the Sweetening cola example in topic 8): calculating power. The cola maker wants to test at the 5% significance level the following hypotheses: H0: = 0 versus Ha: > 0 Ten taste scores were used for the significance test. The distribution of taste scores is assumed to be roughly Normal with standard deviation =

will need experience in markov chains. please try to solve as soon as possible. 4 Bobs. in a. Straw Imagine that Wan Fung is drinking milk tea and he has a very short straw: it has enough room to t two boba (see Figure 1). Figure 1: A straw with one boba currently inside. The straw only has enough room to t two boba. Here is a formal description
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1.If we randomly select a sample of n30 (large sample) measurement from a population (with mean =m and standard deviation =s ) of any shape: (Hint: refer to the power point notes; and to Fig. 7.5 in the text) a.What is the shape of the sampling distribution of sample mean? b. What is the mean of the sampling distribution? c. What is the standard

9 Which of the following is NOT a component of a linear programming model? Functional constraint Non negativity constraint Optimal constraint Decision variable None of the above QUESTION 7 A manager should know the following things about linear programming: The details of how linear programming models are solved The technical details of how to

when calculating the average for a set of data with extrem scores (e.g., household income), which measure of central tendency would be most appropriate? Mean Median Mode standard Deviation

A research study wishes to examine the proportion of hypertensive individuals among three different groups of exercises; marathon runners, yoga, and crossfit. Of the 78 marathon runners, 14 are hypertensive. Of the 63 yoga practitioners, 6 are hypertensive. And there are 16 hypertensive subjects among the 54 CrossFit athletes. What is the computed

The manager of the Regal Beverage Company must decide whether or not to market a new soft drink flavor. The new drink's success depends heavily on consumer reaction to it. An initial decision analysis based on the available data reveals that the expected monetary value of marketing the new drink is -$200,000. The E MV of buying perfect information

5. Determine the power for the following test of hypothesis. H 0 : = 950 vs. H1 : 950,giventhat = 1,000, = 0.10, = 200, and n = 25. A. 0.6535 B. 0.4938 C. 0.3465 D. 0.5062

A NP researcher randomly sampled 100 women aged 50-65 years and measured their minutes of exercise in the past week, BMI, and depression. Depression was measured using a Likert type scale consisting of 20 items. The summation score ranged from 20 to 100 and the higher the score, the higher the level of depression. The correlation coefficients

Johnny is designing a rectangular poster to contain 16 inches^2 of printing with a 4 inch margin at the top and bottom and a 4 inch margin at each side. What overall dimensions will minimize the amount of paper used?

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Complete Problems 5.5, 5.9, 5.15, 5.21, and 5.25 5.15, 5.21, and 5.25 5.5 The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200 minutes, with the following results: a. Compute the expected number of arrivals per minute. b. Compute the standard deviation. 5.15 Past

PLEASE HELP!! STAT 308 Homework #6 1. According to the US Bureau of Labor Statistics publication News, self-employed persons with home-based businesses work a mean of 23 hours per week at home with a standard deviation of 10 hours. Identify the population and variable. For samples of size 100, find the mean and standard deviation of all possible

Statistics Investigative Task 4 SAT Performance In this Task you will investigate four questions about students' SAT scores at one high school. 1. What is the mean SAT-Math score at this high school? 2. How do these students' SAT Math scores stack up against the rest of the state? 3. Is there a significant difference between Verbal and Math scores

Anova: Single Factor SUMMARY Groups Diastolic_2_Grp_1 Diastolic_2_Grp2 Diastolic_2_Grp3 Count 23 27 29 ANOVA Source of Variation Between Groups Within Groups SS 1.633924 909.2522 Total 910.8861 Sum 2363 2783 2988 df Average Variance 102.7391 11.3834 103.0741 14.14815 103.0345 10.39163 MS F F crit 2 0.816962 0.068286 3.116982 76 11.96384 78

Use Excel to find the following central tendency indicators for the following data (no need to type the data, just double click) Mean= FormulaUsed : Mode= Formula used: Minimum= Formula used= Maximum= Formula used= Range= Formula used=

12) cos(xy) = 1 + sin y. Find dy/dx by implicit differentiation. Please show all steps. 25) y sin 2x = x cos 2y, (pi/2, pi/4). Use implicit differentiation to find an equation of the tangent line to the curve at the given point. Please show all steps. 51) y = sin -1 (2x + 1). Find the derivative of the function. Simplify where possible. Please

### Functions you will need for Homework Data

Suppose that the number of times a college student changes their major follows aPoisson distribution with a mean of 1. What is the probability that a student will change their major exactly 1 time(s)? (a) 0.367879441171442 (b) 0.651819161757163 (c) 0.190727664702865 (d) 0.632120558828558

Suppose that the probability that a new medication will cause a bad side effect is 0.03. If this medication is given to 150 people, what is the probability that exactly three of them will experience a bad side effect

Anderson Area Hospital administration have recently received an internal audit report indicating that 15% of all patient bills contain an error of one form or another. After spending considerable effort to improve the hospital's billing process, the administrators are convinced that things have improved. They believe that the new error rate is

A researcher is interested in studying the relationship between the socioeconomic status of a community and the crime rate in that community.Here is the data he is working with: Please find and put the expected frequencies for the table below in the spaces provided. Please round to a whole number. Question 3 A researcher is interested in studying
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In general, ifaandbare two of the values thatxcan assume, thenP(a)=0andP(b)=0 What can we deduce from this further?

A candidate for political office wants to determine if there is a difference in his popularity between men and women.To test the claim of this difference, he conducts a survey of voters.The sample contains 250 men and 250 women, of which 44% of the men and 52% of the women favor his candidacy.Do these values indicate a difference in popularity?Use

1.(4points) In January 2001, the price for a whole fresh chicken was 1.99 per kilogram.In September 2014, the price for the same chicken was $5.49.(Round thefinal answers to 1 decimal place.) (a) Use the January 2001 price as the base period and 100 as the base value todevelop a simple index. (b) Bywhat percentage has the cost of chicken increased

Discuss briefly What are Taguchi's main contributions to the field of quality management?What makes his contributions unique compared to those of other quality gurus (e.g., Deming, Juran, etc.)?In what ways are his contributions consistent with the philosophies of other quality gurus?

1 1. A plan for an executive travelers club has been developed by an airline on the premise that 5 percent of its current customers would qualify for membership. A random sample of 500 customers yielded 40 who would qualify. a. Using this data, test at level .01 the null hypothesis that the company's premise is correct against the alternative that

1 Z-Test Three Rivers Bank J. P. Getty QNT 275 I5 January 3, 2017 Dr. Stephen Loro Table of Contents I. Introduction 3 Research Problem 3 Purpose of Study 3 Research Question 3 Null and Alternative Hypothesis 3 Alpha Level of Significance 3 Variable Definitions3 Limitations 4 II. Review of Related Literature 4 Background 4 III. Methodology 4

When the p-value is very large, we may conclude that Select one or more: a. the alternative hypothesis has been proven to be falseb. the null hypothesis is plausiblec. there is evidence for the null hypothesisd. the null hypothesis has been proven to be truee. there is evidence against the alternative hypothesisf. there is little to no evidence

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