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Mathematics Questions and Answers December 03, 2021

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How does the formula for the sample mean differ from the formula for population mean? Multiple choice question. For sample mean, the sum of values is divided by the number of values minus one. To calculate the sample mean, you divide by the sample number plus one. The formulas are functionally the same, but 'n' (the sample size) is used instead of

In market basket analysis, the measure of ________ indicates the percentage of times the association rule is correct. Group of answer choices support lift confidence positivity

Explain the difference between incidental and formal learning and provide an example of each by describing the needs of the child, the adaptation and explain why this adaptation would be useful.

What step might you use to code qualitative data? Take anecdotal notes Create your own code Translate data into another language Make additional notes as you review information

an introductory statistics class was asked whether they would take a second semester of statistics. 13 of the 30 students surveyed said no and the other 17 said yes. if a student from the class is selected at random what is the probability of selecting a student that said yes?

The Seneca Children's Fund (SCF) is a local charity that runs a summer camp for disadvantaged children. The fund's board of directors has been working very hard in recent years to decrease the amount of overhead expenses, a major factor in how charities are rated by independent agencies. The following data show the percentage of the money SCF has

haiii plz helpi meeee answer thiz. i wrong answer,i dont get it heheeed It Find the solution of the following linear inequalities in one variable. Express your ons Interval notation. (2points for the solution, 1point for Interval notation) 12-13) -2+3 27 Solutions - 204 1+- 15 -212-7 14 ) Interval Notation: 15-161 .5m . 75-m-9 Solution: -41m S 1-7
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Which is the first variable to be removed from the regression model? Group of answer choices Intercept Floor (sq,ft.) # of office suites Entrances Age Access

What statistical analyses did the authors use to calculate the findings in the Anthony et al . 2 0 1 0 No Interuption Zone? ( SELECT ALL THAT APPLY ) Group of answer choices Descriptives / Percentages Persons r 2 - tailed independent t - test Effect size

hey, could you explain the Issues about enforceability generally with contracts online for minors and any cases that relate please

Business statistics Do students reduce study time in classes where they achieve a higher midterm score? In a Journal of Economic Education article (Winter 2005), Gregory Krohn and Catherine O'Connor studied student effort and performance in a class over a semester. In an intermediate macroeconomics course, they found that students respond to
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Se refiere a una descripcin grfica de las actividades a realizar en relacin con el tiempo en el que se van a llevar a cabo, determinando con precisin pero presentando cierta tolerancia para efectos de imprevistos

In an English Class, the midterm exam raw scores (i.e., the values of x) form a normal distribution, with a mean of 239 and a standard deviation of 37. Which exam score corresponds to the 67th percentile?

a factory makes parts for laptop computers, including screws. the screws are required to have the right length. the length of the screws obey a normal distribution with mean u=4.25 millimeters and standard deviation o=0.022 millimeters calculate the 95th percentile of screw lengths

Suppose that we randomly sample 112 high school students to investigate an association between involvement in extracurricular activities and grades. We use the data to conduct a chi-square test of independence at the 5% level. In this results table, the observed count appears above the expected count in each cell. What can we good grades | poor

The time to complete 1 construction project for company A is exponentially distributed with a mean of 1 year. Therefore: (a) What is the probability that a project will be finished in one and half years? (b) What is the probability a project will take more than one year but less than two years? (c) If company A works on projects nonstop, what is

Si no se realiza un adecuado diagnstico de los problemas de aprendizaje y no se realiza la intervencin individualizada, es muy probable que se presente Pregunta 3Respuesta a. Fracaso en la adaptacin escolar. b. Problemas en el aprendizaje. c. Problemas de socializacin. d. Bajo rendimiento escolar

The arrivals of customers at a small shop follow a homogeneous Poisson process { N ( t ) , t 0 } with rate . Suppose that each customer spends a random amount of time, s i in the shop, with distribution F and mean E [ s i ] = s . If a new customer arrives while another customer is in the shop, the new customer is lost. Suppose that each customer

An _________ is a score in a distribution of scores that is far away from the other scores in magnitude. orthodox anomie outlier anomaly unorthodox

When a pretest-posttest research design is used, you can expect the significance calculation to be based on which of the following? Beta coefficient Change Scores Chi Square Reduction technique

The following table summarizes the distribution of students by the academic class and if they live at home or not. Live at Home Freshman 22 Sophomore 15 Junior 11 Senior 2 Do Not Live at Home Freshman 12 Sophomore 5 Junior 6 Senior 8 If a student is randomly selected fromthis class, then what is the probability that this student will be a

Scenerio #1- ski resorts are interested in the mean age that children take their first ski and snowboard lessons. They ned this information to plan their ski classes optimally. Q- 1 What is the variable of this study a. The variable is the number of ski or snowboarding lessons offered at the king resort b. the variable is the age of each child

The following chart is an example of a __________. The chart shown plots each individual data point in blue for males and red for females. a. strip chart b. frequency polygon c. trellis display d. scatter chart

Table Data and Chi-Square. In a study of adverse effects of the drug VIAGRA, 1463 male subjects participated in an experiment.One group of 735 received the drug VIAGRA and a second group of 728 received a placebo.The subjects were then asked about the presence of a headache.The data for the study are given below. \f
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Upon arriving his hometown from abroad, rizal was called with a certain name for was a doctor who came from germany, what his name?

A sum of$900at12%interest compounded continuously will grow to V ( t ) =900 e 0.12 t dollars in t years. Find the rate of growth after the following amounts of time. (Round your answers to two decimal places.) (a)0 years (the time of the original deposit) dollars per year (b)5years dollars per year

A psychologist would like to examine the effects of different testing methods on the final performance of college students. One group has regular quizzes (n=4), one group has three large exams (n=4), and the third group only has a final exam (n=4). At the end of the course, the psychologist interviews each student to get a measure of the student's

MULTIPLE-CHOICE QUESTION How might business industry researchers in the automotive industry make use of inferential statistics? by tracking the change in the total value of the new car market over the past five years by predicting the demand for electric cars based on responses to a survey by grouping the total number of cars sold in the previous

We have three price points and three product colors and we have randomly assigned combinations of price points and colors to focus groups who have rated them on how likely they would be to purchase them. What is the simplest test we could use to see if there is any impact of price point, color, or their interaction? Please pick one of the below

One of the reasons that some scientific studies cannot be replicated is because statistical data associated with those studies is overly processed and misused or manipulated until a finding appears that is statistically significant. The problem is that this often leads to false positives. This treatment of the statistical data is sometimes

Dr. Wood is interested in maternal weight gain and its relationship to infant outcome. After obtaining IRB approval, she collects a convenience sample of pregnant women who have delivered in the past year and, using their prenatal records, records their total weight gain. She then looks at their delivery room medical record and records the infant

In one study, subjects with an acute condition showed improvement upon receiving a new medication. This could be a spurious resulting from... Group of answer choices restriction of the range nocebo effects inter-individual differences regression to the mean

(1) Stuart wishes to have $14,000 to buy a used car three years from now. He plans to accomplish this, through an account with a nominal interest rate of 3% compounded monthly, by depositing $300 at the end of each month during the rst year, and Q at the end of each month during the second two years. What is the smallest Q that will sufce
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Each side of a fair, six-sideddie has a certain number of dots on it,1,2,3,4,5,or6 . The die is rolled by a board game player as part of their turn. Identify the correct experiment , trial , and outcome below: Select all that apply: The experiment is identifying the number that is rolled on the die. The experiment is rolling the die. A trial is

Objetivo: Construir el Mapa Estratgico Esta actividad consiste en disear el mapa estratgico, considerando las 4 perspectivas del Cuadro de Mando Integral, Paso 1: identificar los objetivos de cada perspectiva y resumirlo en una frase que lo relacione. Paso 2: Hacer la relacin de causa y efecto. Paso 3: Organizarlos antes de diagramarlo en al Mapa

Sociologists says that 90% of married women claim that their husband's mother is the biggest bone of contention in their marriages (sex and money ar lower-rated areas of contention). Suppose eleven married women are havin coffee together one mornin. Find the following probabities. (round your answers to three decimal places). A. All of then

Sports sciensts were interested in the effects of anxiety and experience on high board diving performance. All three variablesare correlated with each other, but what correlaon test could be run if you wanted to find out the degree of 'exclusive'variance anxiety had on diving performance without the interacon of the experience variable?a.Paral

The short-film festival at the county fair draws a large crowd of moviegoers who enjoy the work of local filmmakers. Each year, attendees vote for their favorite film in several categories, including comedy, horror, and documentary. 65% of the 280 votes cast in the comedy category were for Cat-urday Night Fever .

MULTIPLE-CHOICE QUESTION According to the article, what is another name for qualitative data? O graphic data objective data categorical data

Please help with the following in the attachments Question 3 v FLAG QUESTION Which of the following can be a probability there can be more than one answer. Answers A - D A 0.1 B -0.1 C O D 2Question 7 v FLAG QUESTION . . . What is the a subset of a population called? Currently Selected : C A Population super set B Population C Sample D None of the
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1. SDSU's Fitness and Nutrition Center states that the average student spends at most $223 on food and beverage per month. You would like to test SDSU's Fitness and Nutrition Center claim at the .05 level of significance, so you randomly select 36 students get a sample mean of $240 and the population standard deviation is $48. A.What will be the
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A wireless company claims that the average of the customers cell phone bill is less than $90.00 per month. A sample of 75 customers reported that their average monthly bill is $84.25 with a standard deviation of $16.03. Test the claim at = 0.005.

3) In a recent semester at a local university, 530 students enrolled in both General Chemistry and Calculus I. Of these students, 53 received an A in general chemistry, 83 received an A in calculus, and 25 received an A in both general chemistry and calculus. Find the probability that a randomly chosen student received an A in general chemistry or
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Try different starting solutions. Can you find other solutions with the same objective value? If so, what does that mean? What do you tell your decision-maker if he/she asks if these solutions are truly optimal? Do you observe anything interesting with the solutions for parts A and B? Please comment

Read the descriptions of several variables below. Select all of the variables which are Categorical. Telephone area code for a customer. Brand of capacitor used on a component board. Amount of time spent to complete a puzzle. Antibody type for a blood donor. Weight of peaches that received a new fertilizer

11. Yuk Ping belongs to an athletics club. In javelin throwing competitions her throws are normally distributed with mean 41.0 m and standard deviation 2.0 m. (a) What is the probability of her throwing between 40 m and 46 m? (b) What distance will be exceeded by 60% of her throws? Gwen belongs to the same club. In competitions 85% of her javelin
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If a negative number is divided by another negative number, the answer will be a positive number. Group of answer choices True False

We have randomly selected 30students from Section 1 and 25 students from Sections 2 of the MSCI course at UWindsorfrom the last term.We recorded their grades A, B, C, D, or F. If we do a test on this data at5% significance level, write down the critical value

Identify a true statement about the coefficient of correlation. Multiple choice question. It expresses a relationship among more than two variables. It is interpreted by its sign and magnitude. It expresses the relationship between variables that are usually discontinuous. It signifies a nonlinear relationship between more than two variables

A _____________ is simply a table that tells us how many things were observed in a particular category. frequency pentagon cross-tabulation data matrix frequency distribution frequency polygon

27 1 p Participants read about 600 people at risk of dying from a deadly disease. Which wording led the participants to prefer Program B? If Program A is adopted 400 people will die. If Program B is adopted there is 1/3 probability that nobody will die, and 2/3 probability that 600 people will die. If Program A is adopted nobody will die. If

A local gas station waits 4 days to receive a delivery of regular gasoline to replenish its inventory. The wait period to receive inventory is known as the lead time. The demand during the lead-time period for regular gasoline, as measured in gallons, follows the normal distribution with a mean of 930 gallons and standard deviation of 140 gallons.

For a confidence level of 99% with a sample size of 18, find the critical t value. Round your answer to three decimal places.

You have a design where you have 3 levels of one blocking variable, 3 levels of another blocking variable, and 3 conditions. What is this kind of design called? Please pick one of the below answers. The correct answer is one of the following options: Two-way factorial ANOVA One-sample t-test Chi-square test of independence Randomized incomplete

un motor de ignicin por chispa, ocurre algo de enfriamiento al expandirse el gas. Esto se puede modelar usando un proceso politrpico en lugar del proceso isentrpico. Determine si el exponente politrpico utilizado en este modelo debe ser mayor o menor que el exponente isentrpico

Question 6 I need help getting answers for this question and show work of how you got the answers and separate make the formula sheet so it would be the answer the work and the formula sheet Question 6 Use the Empirical rule to solve the problem. At one College, GPA's are normally distributed with a mean of 3 and a standard deviation of 0.6. What
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The average age that young people experience sex for the first time 12 O 15 O 17 O 19

The practical range of T-scores is 20 to 80. True False

The next four questions refer to the following information: Two methods, A and B, are available for teaching a certain industrial skill. There is a 95% chance of successfully learning the skill if method A is used, and an 80% chance of success if method B is used. However, method A is substantially more expensive and is therefore used only 25% of

based on the information below, find the (valid) number (N) and percentage or proportion (the valid percent value divided by 100) for one nominal or one ordinal variable. additional find the c.i = Ps + Z PU ( 1 - PU ) N Better for man to work, woman tend home Frequency Percent Valid Percent Cumulative Percent Valid STRONGLY AGREE 55 3.8 5.6 5.6

(1 point) A $65000 oil detector is lowered under the sea to detect oil fields, and it becomes detached from the ship. If the instrument is not found within 36 hours, it will crack under the pressure of the sea. It is assumed that a SCUBA diver will find it with probability 0.74, but it costs $ 600 to hire each diver. a)How many SCUBA divers should
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Probability sampling is required when researchers want to Blank______ on the basis of the results of their surveys. Multiple choice question. increase the confidence intervals make precise statements about a specific population increase the response rates of the surveys eliminate any instance of social desirability response sets

Julia se siente mal y tiene que (ir) ir al consultorio. El mdico (querer) quiere que Julia (estar) est a dieta especial por tres semanas. Julia (preferir) prefiere que el mdico le (dar) d otro remedio porque Julia no (desear) desea dejar de comer carne de res. El mdico dice que (ser) es ms sano comer pescado y pollo. El mdico recomienda que ella

how would i create a simple bar chart to reflect harassment ratings

You want to quote a statistic that reflects how accurately you can predict the income of students once they graduate based on the number of enrolled students at the school. Which of the following would be the best choice?

based on the information below, find the (valid) number (N) and percentage or proportion (the valid percent value divided by 100) for one nominal or one ordinal variable. additional find the c.i = Ps + Z PU ( 1 - PU )/N Statistics Abortion if woman wants for any reason N Valid 947 Missing 516 Abortion if woman wants for any reason Frequency

2. Question 2 What should you consider when designing charts and graphs in Tableau? 1 point Include all data, relevant or not, for a deeper understanding of patterns and trends Focus on relevant data and avoid using data that is unrelated to your KPIs Use a wide variety of colors to enhance the data Use one chart type for consistency

what are the df for determining the critical value of t

In a game show, a participant is asked ten multiple-choice questions. Each question has five possible answers with only one of these answers being correct. A participant wins a prize if they correctly answer seven or more of the questions. Assuming that the answer to each question is independent from each other, answer the following: a) What is

The variable of gender is on a _____ scale of measurement and would be a _____? A. nominal//grouping variable, B. ordinal//factor, C. ratio/interval//dependent list, D. cannot be determined

You have conducted a test and have this information: p = .03 and a = .05, what is the probability that you will make a Type 1 error? If you want to decrease the chance of making a Type 1 error what should you change? You have conducted a test to measure the effectiveness of two different text books.Your results were statistically significant that

Which of the following indicates a strong positive correlation? Group of answer choices .93 -.81 .45 0

A random sample of5,643physicians in Colorado showed that3,251provided at least some charity care (i.e., treated poor people at no cost).(a)Let p represent the proportion of all Colorado physicians who provide some charity care. Find a point estimate for p . (Round your answer to four decimal places.) (b)Find a 99% confidence interval for p .

Question Set 1: Completing an ANOVA Source Table Complete the ANOVA source table below by filling in the green cells. Show all of your work below the table using the equation editor as needed. Copy+paste the F distribution from Minitab Express that you used to find the p value. [20 points] \f\f\f\f\f
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The BBC Company is forecasting demand to fluctuate over the next four periods. If the beginning inventory level is 120 units and the company wants a pure level output plan, what level of production is required to avoid back orders during any period and to keep ending inventory for period 4 at a minimum? The forecast is: Period 1-1900; Period

what is you conclusion on the data between number of police increase and number of homicides increase

1 I:::s:leo\"l"v';?g d.ata represent the continuous random ch is the precipitation totals for the month of September in 21 different towns in Alaska. Use 6 classes and construct a frequency histogram of this data. Explain the resulting probability distribution characteristic ( symmetric , skewed left, skewed right ). Use this histogram as the
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Find the domain and range \f
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its a strange one because F_1(x) = sqrt(1-2x_1x_2) and its derivative is not real form x_0={1,1}

What is the answer to the question 3) According to the National Highway Traffic Safety Administration, 85% of all U.S. drivers use their seat belts. Assume this percentage represents the true population proportion of all U.S. drivers. If a random sample of 900 U.S. drivers is selected, then: a) State the mean and standard error of the SAMPLING
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Find the particular solution of the differential equation that satisfies the initial condition(s). f" (x) = 3x , f'(-1) = -2 f(2) = 8 f ( x ) =Find the particular solution of the differential equation that satisfies the initial condition(s). f"(x) = sin(x), f'(0) = 9, f(0) = 1 f( x ) :An evergreen nursery usually sells a certain shrub after 5
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Wind turbines are notorious bird killers. In the name of green energy, a study was conducted to reduce harm to these flying beasts. It is thought that blade color can either attract or detract insects, in turn attracting or detracting birds and bats. The study was conducted to determine if blade color influenced fatality counts. Four different

. Recently, the stock market took big swings up and down. A survey of993adult investors asked how often they tracked their portfolio. The table shows the investor responses. What is the probability that an adult investor tracks his or her portfolio daily? Express your answer as a simplified fraction and as a decimal rounded to three decimal places.

a) Write negation, converse, inverse and contrapositive of a given universal conditional statement <3 2 <9 b) The statement written in part a, a true or a false statement? If true or false, give reason?

The following data represent the monthly phoneuse, inminutes, of a customer enrolled in a fraud prevention program for the past 20 months. The phone company decides to use the upper fence as the cutoff point for the number of minutes at which the customer should be contacted. What is the cutoffpoint? 414 508 316 494 437 324 406 317 392 447 374 540

Suppose that the creatine kinase levels among healthy males are normally distributed with a standard deviation of22 units/L. Research shows that exactly5 % of the healthy males have a creatine kinase level above152 units/L. What is the mean creatine kinase level in healthy males? Carry your intermediate computations to at least four decimal

The team is allowed to substitute a player even if the ball is still in play. Select one: O True O False Check

z score for One research study of illegal drug use among 12- to 17-year-olds reported a decrease in use (from 11.4% in 1997) to 9.8% now. Suppose a survey in a large high school reveals that, in a random sample of 1,050 students, 99 report using illegal drugs. Use a 0.05 significance level to test the principal's claim that illegal drug use in her

paraphrase: Small sample sizes can provide more in-depth information. On the other hand, large sample sizes can deliver results faster and in a more generalized capacity. However, what is considered a large sample size? It is 100? 200? Instead, paying attention to 15 or 30 participants can provide new

Which of the following is correct? Which of the following is correct regarding inferential statistics? O A. When using the sample mean as an estimate for the population mean, one is using inferential statistics O B. The main focus of inferential statistics is to summarize and display data. O c. Users of inferential statistics are only concerned
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what happened if MSE on the log transformation is lower than on the original one

An example of ineligibility testing would be __________________

Which of the following statistics methods refers to the use of historical data to calculate the probability of certain outcomes? Responses empirical probability empirical probability descriptive statistics descriptive statistics correlation correlation regression regression

Question 4: From a sample of 50 individuals in the US, the average weekly food cost was found to be $54.59 with a standard deviation of $3.46. You are presented a confidence level of (53.3296, 55.8504) for the average weekly food cost for an individual in the US. What is the confidence level of this confidence interval? Show your work
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FBA Sam et al., Updated 2022 Page 10 of 39 Planning Checklist Learner's Name: ______________________________ Date/Time: _____________________________ Observer(s): ________________________________________________________________________________ Target Goal/Behavior/Skill (short): _______________________________________________________ Directions:

Could you help giving me explanations on this problem ? Thank you. A study was conducted to determine the correlation between gender and the most favorite avor of ice cream, with the following result: Vanilla Chocolate Strawberry Mint Male 101 26 35 22 Female 116 12 75 13 (a) ' - Compute the constant Q for the contingency table test. (b). Is We
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The time it takes to assemble an electronic component is normally distributed with a mean of 17.2 minutes and a standard deviation of 3.1 minutes. (a) The probability is 95% that it will take at least how long to assemble a component? (b) What is the probability that it will take at least 16 minutes to assemble a component?

Causal relationships are potentially useful for which component of time series models

Translate: "the quotient of eight more than n and seventeen"
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7. Suppose annual snowfall in Big Bear City is normally distributed with mean average of 58 inches (u = 58) and standard deviation of 10 inches (6 = 10). What's the probability that a randomly selected year has more than 70 inches of snowfall? P(x 2 70) (6 pts) -1E99

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