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Mathematics Questions and Answers January 14, 2019

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Which of the following is not a criterion for a procedure that results in a binomial probability distribution? The procedure has a fixed number of trials. The trials must be independent. Each trial must have all outcomes classified into two categories usually referred to as "success" or "failure." The probability of success must be different in

A poultry farm sells eggs classified as large, which requires the mean weight of the individual eggs to be oz. The department of weights and measures weighs a random sample of eggs to determine if the mean weight is less than oz at a significance level of . The results of the sample are given below. -statistic = Since the -value is -value = than

All submissions must be in allowable formats: Microsoft Word (.doc, .docx), PDF, or text file (.txt). For each scenario below: State both the null ( ) and alternative ( ) hypotheses in your own words. Using the p and values, decide whether to reject or retain , and explain why. Interpret the result in context (i.e., what does the decision mean in

use the data to answer the question 5 What part of a neuron was investigated in this activity? 1 Define the term threshold as it applies to an action potential. Experiment Results Stimulus Voltage Peak Value at R1 Peak Value at R2 Action Potential (mv) (HV) (HV) 10 0 No 20 100 100 Yes 30 100 100 Yes Select 40 100 100 Yes 50 Yes quest 100 100

Soleil, a kindergarten student, was administered three letter name fluency (LNF) probes to determine how many upper- and lower-case letters she is able to identify in one minute. Soleil's scores were as follows: Week 1: 7 letters Week 2: 10 letters Week 3: 9 letters

Assume you test dry and uncemented sand specimens in direct shear and triaxial shear tests. During the triaxial test, the specimen fails when the major and minor principal stresses are 140 pounds per square inch (psi) and 40 psi, respectively. What shear strength would you expect during the direct shear test if the applied normal stress equals

Use the accompanying data table to (a) draw a normal probability plot, (b) determine the linear correlation between the observed values and the expected z-scores, (c) determine the critical value in the table of critical values of the correlation coefficient to assess the normality of the data

Elise is ready to plan the "rst step of her vacation: the destination. To "gure out where Elise should go on her vacation (Europe, South East Asia, or USA), she thought she could draw a slip of paper out of a hat. In the hat are ten pieces of paper, and on each piece of paper is the destination suggested by each of her ten friends. If Elise is to

Determine how to apply the second basic step in a statistical study in this situation. Choose the correct answer below. A. The researcher should only gather raw data from ninth dash graders that do not have cell phones. B. The researcher should only gather raw data from ninth dash graders that have cell phones. C. The researcher should gather data

use the data to answer the question 5 What part of a neuron was investigated in this activity? 1 Define the term threshold as it applies to an action potential. Experiment Results Stimulus Voltage Peak Value at R1 Peak Value at R2 Action Potential (mv) (HV) (HV) 10 0 No 20 100 100 Yes 30 100 100 Yes Select 40 100 100 Yes 50 Yes quest 100 100

To determine how unusual a group of 45 randomly selected boys from West Texas with an average birthrate of 112 ounces is, we can use the normal distribution and compare it with the mean and standard deviation given for the general population of baby boys

1. Imagine that the director of the counseling center at Valdosta State University wants to examine stress levels of students. From the student directory, she randomly chooses 100 of the 12,500 students and assesses their stress levels in a diagnostic interview. She reports that the average stress level is 10 on a scale of 1-50, a score she knows

Let d be the distance traveled (in miles) after a student has driven for t hours (not counting pit stops). Some pairs of values of t and d are shown in the following table. Complete parts a to c. t (hours) d (miles) 0 0 1 70 2 140 3 210 4 280 . . . Question content area right Part 1 a. Create a scattergram of the data. Then draw a linear model.

Hospital Admissions A study of 31,000 hospital admissions in New York State found that 4% of the admissions led to treatment-caused injuries. One-seventh of these treatment-caused injuries resulted in death, and one-fourth were caused by negligence. Malpractice claims were filed in one out of 7.5 cases involving negligence, and payments were made

2. A researcher is interested in whether the presence of visual distractions (no distraction vs. distraction) and the level of task complexity (low vs. high) impact the number of errors made by undergraduate students during a problem-solving task. The presence of visual distractions was manipulated by having participants perform the

Ten vehicles were selected from a vintage sportscar catalog with the following data, where x is the age of the car in years and y is the price in hundreds of dollars x 6 6 6 2 2 5 4 5 1 4 y | 125 | 115 | 130 | 260 | 219 | 150 | 190 | 163 | 260 | 160 Assuming a linear regression, calculate the correlation coefficient for the price of the cars

Re hlaloete diphetogomedumo te di latelago gomme o thekge tlhaloo ya gago ka mehlala ya maleba. Hlokomela gore le ge mehlala ya gago e swanete go ba mantu, o se lebale go tweleta thwii gore ke medumo efe ye e amegago. (a) Thatafato (b) Poufato (c) Thinifato (d) Tumammogofato (20)

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 2525 subjects had a mean wake time of 101.0101.0 min. After treatment, the 2525 subjects had a mean wake time of 96.396.3 min and a standard deviation of 20.920.9 min. Assume that the 2525 sample values appear to be from a

As the statistician on the project, explain how you could conduct a study to decide if there is evidence that the rate of obesity among the clinic's patients is less than 42.4 % 42.4%. In 2017-2018, the National Health and Nutrition Examination Survey estimated that 42.4% of American adults fit the medical definition of obese.t!! Overweight and

To extend the discussion, appraise the four levels of measurement as they might be applied to some of your peers' examples. Why is it important to discern the level of measurement of your data before you select a statistical design

The President of the American Insurance Institute wants to compare the yearly costs of auto insurance offered by two leading companies. He selects a sample of 15 families, some with only a single driver, others with several teenage drivers, and pays each family a stipend to contact the two companies and ask for a price quote. To make the data

Question 1 Question 1 Question 2 Question 2 Question 3 Question 3 Question 4 Question 4 1.25 Points Question 3 Is there a significant difference between first-and second-generation Asian populations? Yes No 1.25 Points Question 2 What is the difference? -2.33 2.33 0.0198 0.07 1.25 Points Question 1 Is there a significant difference between

Identify all the measures of variability: Group of answer choices Ordinal Nominal Range Coefficient of variation Median Variance Mode Interval Mean Ratio Standard deviation

Determine how to apply the fourth basic step in a statistical study in this situation. Choose the correct answer below. A. If the researcher followed correct procedures, he or she can be confident that the sample statistic is equal to the average number of hours that ninth dash graders nbsp spend on cell phones. B. If the percentage of ninth dash

The starting salary among recent graduates of the Evian Business School has a standard deviation of $17,000. You randomly survey 40 students. Find a 68%-range of sample means that is symmetric around the mean. For example, an 80% range that is symmetric around the mean, we would have 40% values to the left of the mean, and 40% to its right. A

16 Los usuarios finales son Los consumidores finales en el canal de distribucin. Usualmente la letra C en la abreviatura B2C. Los que probablemente tengan un mayor poder de negociacin gracias a Internet Todos los anteriores

A poultry farm sells eggs classified as large, which requires the mean weight of the individual eggs to be oz. The department of weights and measures weighs a random sample of eggs to determine if the mean weight is less than oz at a significance level of . The results of the sample are given below. -statistic = Since the -value is -value = than

As described in the Collecting Data recording, which type of data collection is rarely used because it is so time intensive, but is an option if you need to carefully analyze a situation? permanent product duration recording time sampling anecdotal reports

should i use my logic or this: upper_limit = df['Income'].quantile(0.95) lower_limit = df['Income'].quantile(0.05) df['Income'] = np.where(df['Income'] > upper_limit, upper_limit, df['Income']) df['Income'] = np.where(df['Income']

The use of sampling is to lower the costs of research - doing a study of CSUN students would be very expensive if we talked/surveyed all 45,000 of them. Group of answer choices True False

As the statistician on the project, explain how you could conduct a study to decide if there is evidence that the rate of obesity among the clinic's patients is less than 42.4 % 42.4%. In 2017-2018, the National Health and Nutrition Examination Survey estimated that 42.4% of American adults fit the medical definition of obese.t!! Overweight and

Is the eect of age on earnings dierent for high school graduates than for college graduates? Specify and estimate a regression that you can use to answer this question. " --what's my stata command here

Last year an elementary school committed to recycling paper as opposed to throwing papers in the garbage. They tracked the number of full bags brought to the recycling bin each month and represented the data on the line graph below. The number of papers in the school to be disposed of after use remained constant each month Which of the following

Use Garbage.xls file which consists of data from 60 fictional homes on UFred St. It includes variables regarding the household size, the pounds of each type of garbage disposed in a week, the total weight of their garbage each week, and whether or not the household recycles. ASSIGNED PROBLEM 3: First compute the mean total weight and standard

what does the standard deviation here tell you about the test scores Student Scores 10 10 10 10 10 10 10 9 DO 00 00 00 40|40 10 6 2 8.26 MEAN 10 mode 9 median 1.967573386 Standard deviation

The formula for the chi-squared test statistics can be interpreted plainly as

List and explain 4 things an evaluator should look out for when using a survey or questionnaire to collect data

Identify all the measures of variability: Group of answer choices Ordinal Nominal Range Coefficient of variation Median Variance Mode Interval Mean Ratio Standard deviation

sing the modeling dataset, visually display the data in an appropriate graph and comment on anything that may be of note. In particular, are the assumptions needed for fitting the simple linear model met

To extend the discussion, appraise the four levels of measurement as they might be applied to some of your peers' examples. Why is it important to discern the level of measurement of your data before you select a statistical design

what does the standard deviation here tell you about the test scores Student Scores 10 10 10 10 10 10 10 9 DO 00 00 00 40|40 10 6 2 8.26 MEAN 10 mode 9 median 1.967573386 Standard deviation

Multiple Choice 1 point Employee Deta t @ The Edit View Insert Forms Duns Tools Adsare Hep : Listellenis Average of Days Scheduled to Work Total Days Day's Last Name First Name in March Days Missed Work Work worked Deva Christion 10 Frock 17 Total Days What formulas calculate Brian Sanchez's total days worked and average of days worked in columns

1. Imagine that the director of the counseling center at Valdosta State University wants to examine stress levels of students. From the student directory, she randomly chooses 100 of the 12,500 students and assesses their stress levels in a diagnostic interview. She reports that the average stress level is 10 on a scale of 1-50, a score she knows

Consider the results from Column (3). What is the shape of the effect of boxes on ln(time), holding overall delivery weight fixed

Are there any additional variables that would help you understand Iuiga's situation better? [Hint: you do not need to do any numerical analysis here, simply provide an explanation of the variables and how they might provide deeper insights into Iuiga's performance]

Let d be the distance traveled (in miles) after a student has driven for t hours (not counting pit stops). Some pairs of values of t and d are shown in the following table. Complete parts a to c. t (hours) d (miles) 0 0 1 70 2 140 3 210 4 280 . . . Question content area right Part 1 a. Create a scattergram of the data. Then draw a linear model.

The use of sampling is to lower the costs of research - doing a study of CSUN students would be very expensive if we talked/surveyed all 45,000 of them. Group of answer choices True False

An alpha of 1.0 in exponential smoothing will generate the same forecast that a naive forecast would yield. Group of answer choices True False

Determine whether the events E and F are independent or dependent. Justify your answer. Question content area bottom Part 1 (a) E: A person having a high GPA. F: The same person being a heavy reader of assigned course materials. A. E and F are dependent because having a high GPA has no effect on the probability of a person being a heavy reader of

Question 1 Question 1 Question 2 Question 2 Question 3 Question 3 Question 4 Question 4 1.25 Points Question 3 Is there a significant difference between first-and second-generation Asian populations? Yes No 1.25 Points Question 2 What is the difference? -2.33 2.33 0.0198 0.07 1.25 Points Question 1 Is there a significant difference between

The time spent working out at the gym per month follows a normal distribution with a mean wait time of 55 hours and standard deviation 2.5 hours. 3. (5) What is the probability that a person selected at random will work out between 52 and 60 hours in a month? 4. (5) The 8% of people who work out the longest in a month spend at least how much time

Use Garbage.xls file which consists of data from 60 fictional homes on UFred St. It includes variables regarding the household size, the pounds of each type of garbage disposed in a week, the total weight of their garbage each week, and whether or not the household recycles. ASSIGNED PROBLEM 3: First compute the mean total weight and standard

Provide a comparison of one-sample, paired-samples, and independent-samples t-test s within the context of quantitative business research. In the comparison, do the following: Describe the research example related to "some small business leaders in Essex County lack effective strategies for integrating digital technology, resulting in increased

1. analysis of using the Centre-of-Gravity Technique: Determine the Centre-of-Gravity of the 7 customer locations (for question 1, you can disregard the 5 potential distribution center sites). For weights, use the number of containers provided in the Excel file. Use Excel for the analysis (you can start with Excel Exhibit S7.2, and modify it to

what does these graphs show? FRED - Market Yield on U.S. Treasury Securities at 10-Year Constant Maturity, Quoted on an Investment Basis 5 3 Percent N Me 2017-07 2018-01 2018-07 2019-01 2019-07 2020-01 2020-07 2021-01 2021-07 2022-01 2022-07 2023-01 2023-07 2024-01 Source: Board of Governors of the Federal Reserve System (US) via FRED@

You write each digit of your student number, including repeated digits, on a snippet of paper (therefore, you have 9 snippets). Then you put all the snippets in a bag. Consider the experiment in which you randomly pick up 9 snippets from the bag, one at a time, reintroducing the snippet in the bag right after each extraction. 1. [1 pt.] What is

Twenty students each score a mark of 15 out of a maximum of 40 marks in a test. What is the mean score? Oa. 30 Ob. 20 Oc. 15 O d. 22.5

Last year an elementary school committed to recycling paper as opposed to throwing papers in the garbage. They tracked the number of full bags brought to the recycling bin each month and represented the data on the line graph below. The number of papers in the school to be disposed of after use remained constant each month Which of the following

2. A researcher is interested in whether the presence of visual distractions (no distraction vs. distraction) and the level of task complexity (low vs. high) impact the number of errors made by undergraduate students during a problem-solving task. The presence of visual distractions was manipulated by having participants perform the

Define the terms population, sample, population parameter, and sample statistics as they apply to statistical studies. Question content area bottom Part 1 The population is the complete set of people or things being studied, set of people or things from which the data are obtained, a sample is the set of people or things from which the data are

A batter who had failed to get a hit in seven consecutive times at bat then hits a game-winning home run. When talking to reporters afterward, he says he was very confident that last time at bat because he knew he was "due for a hit." Comment on his reasoning. Question content area bottom Part 1 Choose the correct interpretation below. A. If at

Match the plot with a possible description of the sample. 60 70 80 90 100 A dot plot has a horizontal axis labeled from 60 to 100 in increments of 1. Columns of dots are plotted over horizontal coordinates with heights as follows, where the horizontal coordinate is listed first and the number of dots in the column is listed second: 62 comma 1 ; 64

This is data table 1 Mass of Crushed 0.5 Antacid (g) Concentration of 1.0 HCI (M) Volume HCI (ml) 5.0 Concentration of 1.0 NaOH (M) Initial NaOH 8.8 Volume (mL) Final NaOH 6.4 Volume (mL) Total Volume of 2.4 NaOH Used

Information on the type of industry is provided for a sample of 50 Fortune 500companies.Industry TypeFrequencyBanking7Consumer Products13Electronics10Retail18

t stat An alpyeeteninnanment agency was assigned the task of evaluating reimbursement for office visits to physicians paid by governme edical insurance. The audit was conducted on a sample of 80 reimbursements, with the following results: In 10 of the office visits, there was an incorrect amount of reimbursement. * The amount of reimbursement was

The starting salary among recent graduates of the Evian Business School has a standard deviation of $17,000. You randomly survey 40 students. Find a 68%-range of sample means that is symmetric around the mean. For example, an 80% range that is symmetric around the mean, we would have 40% values to the left of the mean, and 40% to its right. A

What is the purpose of HCAHPS surveys? Please be thorough. Why are these valuable tools and how might results be used

El Frijol Oaxaqueo" brand beans have a ber content that is normally distributed with a mean of 23 grams per can with a standard deviation of 8 grams. The FDA will randomly draw 8 cans and test them for ber content. If the beans contain more than 29 grams they are considered to be grade B since the beans are coarse and have an unpleasant

Use the SLOPE and INTERCEPT functions to compute the slope and y-intercept for the linear trendlines in the first scatterplot in the learning aid for each of the three institution types. Format to 2 decimal places

As the statistician on the project, explain how you could conduct a study to decide if there is evidence that the rate of obesity among the clinic's patients is less than 42.4 % 42.4%. In 2017-2018, the National Health and Nutrition Examination Survey estimated that 42.4% of American adults fit the medical definition of obese.t!! Overweight and

how a case study design could be used to answer your research hypothesis PUA 5304

sing the modeling dataset, visually display the data in an appropriate graph and comment on anything that may be of note. In particular, are the assumptions needed for fitting the simple linear model met

Use the SLOPE and INTERCEPT functions to compute the slope and y-intercept for the linear trendlines in the first scatterplot in the learning aid for each of the three institution types. Format to 2 decimal places

Use the accompanying data table to (a) draw a normal probability plot, (b) determine the linear correlation between the observed values and the expected z-scores, (c) determine the critical value in the table of critical values of the correlation coefficient to assess the normality of the data

You should use a weighted mean instead of a regular arithmetic mean when some values are more important or represent larger groups (Gravetter et al., 2021). The arithmetic mean treats all values equally, but the weighted mean adjusts for differences in importance or sample size. For example, if a researcher wants to find the average test score for

Compare and contrast cluster sampling and stratified sampling. Offer two points of comparison and two points of contrast.

Change the following equation of a line into slope-intercept form. y-4=4x

The warden of Tipton Correctional Facility would like to determine how safe correctional staff feel when working within the facility. In order to address this topic, the warden decides he would like to take a random sample of employees and he begins by gathering a list of all correctional staff currently employed in the facility. Next, the warden

t stat An alpyeeteninnanment agency was assigned the task of evaluating reimbursement for office visits to physicians paid by governme edical insurance. The audit was conducted on a sample of 80 reimbursements, with the following results: In 10 of the office visits, there was an incorrect amount of reimbursement. * The amount of reimbursement was

A batter who had failed to get a hit in seven consecutive times at bat then hits a game-winning home run. When talking to reporters afterward, he says he was very confident that last time at bat because he knew he was "due for a hit." Comment on his reasoning. Question content area bottom Part 1 Choose the correct interpretation below. A. If at

what does these graphs show? FRED - Market Yield on U.S. Treasury Securities at 10-Year Constant Maturity, Quoted on an Investment Basis 5 3 Percent N Me 2017-07 2018-01 2018-07 2019-01 2019-07 2020-01 2020-07 2021-01 2021-07 2022-01 2022-07 2023-01 2023-07 2024-01 Source: Board of Governors of the Federal Reserve System (US) via FRED@

#BRAND ggplot(Laptops, aes(x = Brand, y = Price, size = Price)) + geom_smooth(method = lm, se = FALSE) + geom_point() ggtitle("Price vs Brand (Dot Size Indicates Price)") ggplot(Laptops, aes(x = Brand, y = Price, size = Price, color = Brand)) + geom_point(alpha = 0.6) + geom_smooth(method = "lm", se = FALSE) #PROCESSOR ggplot(Laptops,

Think of the outcome variable as an individual's answer to the survey question "Are you in favor of allowing a local gambling casino to be built in our city?" Would the researcher's comparison between those who won more than $50 and less than $50 reveal a true causal effect, or be contaminated by selection bias

A state's Department of Education reports that 12% of the high school students in that state attend private high schools. The State University wonders if the percentage is the same in their applicant pool. Admissions officers plan to check a random sample of the over 10,000 applications on file to estimate the percentage of students applying for

Identify the population parameter in the given study. Choose the correct answer below. A. the total number of all adults B. the average change in the levels of cholesterol (in mg/dL), 4.4, of the adults in the study after receiving the garlic treatment C. the average change in the levels of cholesterol (in mg/dL) of all adults after receiving the

use the data to answer the question 5 What part of a neuron was investigated in this activity? 1 Define the term threshold as it applies to an action potential. Experiment Results Stimulus Voltage Peak Value at R1 Peak Value at R2 Action Potential (mv) (HV) (HV) 10 0 No 20 100 100 Yes 30 100 100 Yes Select 40 100 100 Yes 50 Yes quest 100 100

Una segun corresponda Relaciona cada item con una opcion: Teoria de la probabilidad Estadistica inductive o inferencial Estadistica deductive o descriptive Opciones: # Sirve para deducir importantes conclusiones acerca de un Se ocupa solamente de describir y analizar un conjunto dado conjunto de datos a partir del analisis de los mismos. de datos,

The starting salary among recent graduates of the Evian Business School has a standard deviation of $17,000. You randomly survey 40 students. Find a 68%-range of sample means that is symmetric around the mean. For example, an 80% range that is symmetric around the mean, we would have 40% values to the left of the mean, and 40% to its right. A

Which of the following is not a criterion for a procedure that results in a binomial probability distribution? The procedure has a fixed number of trials. The trials must be independent. Each trial must have all outcomes classified into two categories usually referred to as "success" or "failure." The probability of success must be different in

The time spent working out at the gym per month follows a normal distribution with a mean wait time of 55 hours and standard deviation 2.5 hours. 3. (5) What is the probability that a person selected at random will work out between 52 and 60 hours in a month? 4. (5) The 8% of people who work out the longest in a month spend at least how much time

can we work on this problem Use Lagrange multipliers to find the maximum area S of a rectangle inscribed in the ellipse + = 1 9 49 (-x, y) (x, y) (-X, -y) (x, -y) (Give your answer as a whole or exact number.) S =

Identify the population parameter in the given study. Choose the correct answer below. A. the total number of all adults B. the average change in the levels of cholesterol (in mg/dL), 4.4, of the adults in the study after receiving the garlic treatment C. the average change in the levels of cholesterol (in mg/dL) of all adults after receiving the

The following frequency histogram represents the IQ scores of a random sample of seventh-grade students. IQs are measured to the nearest whole number. The frequency of each class is labeled above each rectangle. Use the histogram to answers parts (a) through (g). 200 students class width is 10 classes and their frequencies 60-69, 1; 70-79, 4;

Use Garbage.xls file which consists of data from 60 fictional homes on UFred St. It includes variables regarding the household size, the pounds of each type of garbage disposed in a week, the total weight of their garbage each week, and whether or not the household recycles. ASSIGNED PROBLEM 3: First compute the mean total weight and standard

16 Los usuarios finales son Los consumidores finales en el canal de distribucin. Usualmente la letra C en la abreviatura B2C. Los que probablemente tengan un mayor poder de negociacin gracias a Internet Todos los anteriores

Make a line graph from the class data showing the different average urine production rates by the beverages consumed (Hint: each beverage is a data series) as a function of time on the X axis. (2 point) Make a line graph from the class data of average urine specific gravity by the beverages consumed as a function of time on the X axis. (2 point)

sing the modeling dataset, visually display the data in an appropriate graph and comment on anything that may be of note. In particular, are the assumptions needed for fitting the simple linear model met

Question 1 Question 1 Question 2 Question 2 Question 3 Question 3 Question 4 Question 4 1.25 Points Question 3 Is there a significant difference between first-and second-generation Asian populations? Yes No 1.25 Points Question 2 What is the difference? -2.33 2.33 0.0198 0.07 1.25 Points Question 1 Is there a significant difference between

A state's Department of Education reports that 12% of the high school students in that state attend private high schools. The State University wonders if the percentage is the same in their applicant pool. Admissions officers plan to check a random sample of the over 10,000 applications on file to estimate the percentage of students applying for

Suppose you are presented with an opportunity to choose between Option A and Option B, described below. We will call this "GAME I". Option A Spin a wheel, and if you land on "Win" you get $100, and if you land on "Lose" you get $0. The probability you land on "Win" is p = .50 so the probability you land on "Lose" is 1-p = .50 Option B I simply

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