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Mathematics Questions and Answers May 19, 2023

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A 34% decrease resulted in 21 business in the downtown are. What was the number of businesses before the decrease

Section B: Mechanics Whenever a numerical value of g is required, take g = 9.8 m s. 7. A block of mass m kg is projected down a line of greatest slope on a rough plane. The plane makes an angle of e to the horizontal, where tan o = 1 24 The block moves down the plane with a constant acceleration of - By modelling the block as a particle, find the
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A situation that I would be very interested in seeing a statistical relationship would be between the age and the mileage of used cars. The two numeric values being compared would be the age (measured in years) and the mileage (measured in miles)

An agency has an RPO of two hours and an RTO of 30 minutes. The agency suffers a disaster and starts restoring data at noon. By what time can the agency expect to be up and running? Question 22 options: 2:30 p.m. 2:00 p.m. 12:30 p.m. None of these

Suppose that in a random selection of 100 colored candies, 27% of them are blue. The candy company claims that the percentage of blue candies is equal to 25%. Use a 0.10 significance level to test that claim.

For her survey, Professor Fritz chose 100 student names out of a hat containing the names of all the students at the college. Is this a random sample? Multiple choice question. No Yes

The function g is defined piecewise on the set of real numbers. This means that the rule for g depends on the value of x. 1 -X + 8 if x
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The New Zealand Heart Foundation plans to install a free blood pressure testing booth in Aotea Centre. Previous experience indicates that, on average, people arrive every six minutes with a standard deviation of two minutes. Blood pressure measurements take five minutes on average with a standard deviation of four minutes as the variety of people

A doctor wants to know which of two medications for strep throat is the most effective. They do a t-test on how quickly strep throat clears up, and get a p value of 0.82. But they look at their data and see that the means are really far apart one medication cured strep throat in 3 days, and the other in about 6. What else should they look at

To completely describe a normally distributed population you would need to know the population mean, the population variance and the standard error of the mean. True or False

1. Cats are the best pet. 2. They have loveable personalities. 3. They are more independent than dogs. 4. And you don't have to housetrain them. Claim 1 is the conclusion O Claim 2 is the conclusion O Claim 3 is the conclusion Claim 4 is the conclusion

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The standard deviation for stress scores for group A is 15. The standard deviation for stress scores for group B is 30 (much higher than group A). What is true about the shape of the distribution of scores a. the curve for group A will appear more normal, less flat than the curve for group B b. the curve for group B will appear more normal, less

The following table represents undergraduate students at a local university. One student is chosen at random. Give your answer as a decimal out to at least 4 places. Freshman Sophomore Junior Senior Total Live On Campus 2556 3445 2648 4603 13252 Live Off Campus 1040 4210 4223 1686 11159 Total 3596 7655 6871 6289 24411 a) Find the probability that

If b=0.00434, se=0.02409, HR=1.004, 95%CI is 0.958, 1.053. What happens when you increase by 10 and your new HR=1.044, how do I calculate the 95%CI?

A lottery has a payout distribution of $0, $50, $100, and $1000 with probabilities 0.9, 0.05, 0.04, and 0.01 respectively. Calculate the standard deviation of the lottery payout

Joana assiste preocupada a consulta porque est sozinha e s vezes fica deprimida, ela diz que a situao em sua casa est ficando cada vez mais difcil. Joana uma mulher de 70 anos de idade, mora com seu marido de 75 anos

3. (Arithmetic-geometric mean inequality ) Given real a, b > 0, show that vab
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When deciding which measure of variability to use, it can be crucial to take into account both the organization of the data being studied and the particular objectives of the research at hand. Within statistics, selecting the right measure of variability is essential for accurately analyzing and understanding data collected from our studies. Key

_________blank is a statistical method that is an extension of multiple regression and helps researchers determine whether there are meaningful relationships between the variables shown in the structural model. Multiple Choice Covariation Confirmatory composite analysis Analysis of variance The Pearson correlation Partial least squares

Which of the following describes whether the claim applies to all members of the group or a certain subset? Multiple choice question. Quality Quantity Major Minor

The following table is of profit, revenue, and number of employees of 10 companies. Profit US $ billion Revenue/employee No. of Employees US$ Exxon 11.9 96,190 122800 Royal Dutch 7.5 74,283 105000 British Petroleum 4.4 70,856 56450 Petrofina SA 2.7 67,392 69063 Texao In 2.8 92,108 29315 Elf Aquitaine 0.97 11,461 83800 ENI 3.6 37,416 80173 Chevron
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i mean the prototype that i need is that like the sketch or an anime of an international student being loneliness

Determine the number of significant digits in the given approximate numbers. 1.802 Question content area bottom Part 1 The number of significant digits in 1.802 is enter your response here

Scenario A. Mr. Gonzalez is a 2nd grade teacher and he is interested in studying whether using Minecraft assignments that encourage students to write computer code will influence students' interest in writing computer code. He compares interest in coding in his own class to the interest in the other 2nd grade classroom, which did not get the new

In the context of science, a statement that describes or explains a relationship between or among variables is called: A hypothesis A corollary A deduction A theory

Given P(A)= 0.3 and P(B)= 0.4 If P(A and B) = 0.1 compute P(A or B) if A and B are independent. (2pts) Question 2 - Given P(A)= 0.3 and P(B)= 0.4 If P(A and B) = 0.1 compute P(A or B) if A and B are independent. 0.6 0.5 0.7 0.15 0.25

True/False: When using the normal approximation, we can assume that the test statistic T is normally distributed

The IQ scores for a random sample of subjects with low lead levels in their blood and another random Low Lead Level #1 71 93.03461 15.59777 sample of subjects with high lead levels in their blood were collected. The statistics are summarized in the High Lead Level #2 21 87 27173 8.55961 accompanying table. Assume that the two samples are
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National norms are obtained by testing _____. Multiple choice question. a select sample of people representative of a particular racial/ethnic background a large number of people representative of different variables of interest a select sample of people representative of any one part of the country a large number of people representative of the

What is one measure of the accuracy of a forecasting model? the mean absolute error the seasonal index the linear trend the smoothing constant

Question 2 You are proctoring a test for class A and decide to measure the length of time it takes each person to finish. These times are given below. # Run this cell times.A = c(44.84, 44.17, 38.2, 45.2, 38.83, 47.38, 42.36, 38.1, 36.51, 35.1, 35.52, 33.43, 44.86, 43.49, 39.85) Part A) Calculate the 95% confidence interval for on, the true
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Population c. 95 gears that were sampled Parameter d. 2.89 inches Statistics 2. Following data corresponds to arrival time of students to class in reference to the start time(negatives are those who arrive early): 1.6 2.8 0.3 1.2 -4.3 2.8 2.4 3.2 -1.7 -0.7 0.2 -7.7 2.3 -0.7 2.4 -0.1 -1.4 -1.8 -0.6 2.9 4.6 -0.2 -2.9 2.5 a. Construct a 5-class
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The National Cable and Telecommunications Association recently reported that the mean number of HDTVs per household in the United States Is 2.30 with a standard deviation of 1.474 sets. A sample of 100 homes in Boise, Idaho, revealed the following sample information. Number of Number of HDTVS Households 27 28 18 10 5 or more 10 Total 100 ASpicture
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A linear revenue function is R = 38.75x. (a) What is the slope m? m= (b) What is the marginal revenue MR? MR = What does the marginal revenue mean? O If the number of units sold is increased by this amount, the revenue decreases by $1. O Each additional unit sold decreases the revenue by this many dollars. O If the number of units sold is
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Forty-five men and women were asked their preference for ice cream flavors. Below are the responses, given in a two way table. Men Women Total Chocolate 10 15 25 Vanilla 7 6 13 Cookies n Cream 3 4 7 Total 20 25 45 1. What is the proportion of women who prefer Chocolate? Round your answer to two decimal places. 2. What is the proportion of

Solve the following optimization problems. (a) min 2 =f(:t]= z3+3x4subject to 36R. (13) min 2 = f(x) = 133' subject to z E R
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When calculating the standard deviation, what must be done in order to obtain an unbiased estimate? Group of answer choices subtract 1 from X add 1 to X subtract 1 from n add 1 to n Flag question: Question 32 Question 321 pts Standard deviation is a measure of how much individual scores differ from the ______. Group of answer choices mean expected

A particular diamond mine 77% of the diamonds fail to qualify as gemstone grade a random sample of 112 is analyzed. fine the probability that more than 81% of the sample diamonds fail to qualify. show with steps

How can I estimate the hazard rates and HR if group 1 has a median survival of 12 months, group 2 median survival is 18 months, accural time of 24 months, followup time of 24 months, 2 sided test with alpha of 0.05 and even allocation?

When using forward linear predictor (FLP) and backward linear predictor (BLP) to estimate samples in WSS random processes, which of the following properties of FLP and BLP will be identical? the phases the MMSE powers the filter coefficients none of the above

You make the following set of 9 measurements of the distance travelled by an object. What is the best estimate of the mean distance travelled with the standard deviation of the mean? 10.0 cm 11.0 cm 13.0 cm 13.5 cm 18.0 cm 12.0 cm 14.0 cm 10.5 cm 6.0 cm Group of answer choices

Anecdotes can be just as valid as evidence as statistics, even though statistics tend to have a better reputation as objective fact. But every statistic is really a form of anecdote; every statistic tells a tale in shorthand." - Ken Lindblom (Stony Brook University) As you read

The Mantel Haenszel Chi-Sq Test is used to adjust for potential confounding. It tests the null hypothesis of independence between two categorical variables using data from a population subdivided into L classes: it is, therefore, a test for use with a 22L contingency table. If a Mentel Haenzel Chi-sq test was conducted on Survival at 5 years (yes

d) (8 pts.) Investigate the relationship between resilience and severity of depressive symptoms. i. Create a plot illustrating the relationship between resilience and depressive symptoms. Describe what you see. ii. Conduct a formal analysis of the relationship between resilience and depressive symp- toms. Summarize your findings. You may proceed

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Q14. Suppose A and B are defined as follows. \f
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sample re-phrase this discussion: Ms. Tam gained valuable insight about Shirley's language proficiency via the English-language evaluation. With a raw score of 41, a standard score of 86, a percentile rank of 18, and an age equivalent of 4.6 years, Shirley's auditory comprehension implies that she may have some difficulty understanding spoken

\fQUESTION 15 QUESTION 13 - If precipitation falls from a cloud 1 km thick with a low base, what is the probability that it will be drizzle? What is the probability that it will be rain? Drizzle 82%; Rain 18% O Rain 88%; Drizzle 12% Drizzle 88%; Rain 12% Drizzle 78%; Rain 22%
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What are the averaged y and x values for the fifth observation, respectively

Create equivalent Expressions: 1. Show that '' is definable in terms of 'A' and '.' by creating an expression logically equivalent to (PQ) that uses no other connectives than 'A' and '.'. 2. Show that 'v' is definable in terms of 'A' and ':' by creating an expression logically equivalent to (PvQ) that uses no other connectives than 'A' and '
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Researchers must choose either qualitative methods or quantitative methodsthey cannot use both in the same study true or false

Job Hourly Annual Title Rate Wages 1. Cook, fast food $6.54 2. Cook, institution $8.38 3. Cook, restaurant $8.52 4. Cook, short order $7.14 5. Food attendant $6.70 6. Dishwasher $6.78 7. Home health aide $9.04 8. Nursing aide $8.59 9. Pharmacy aide $9.14 10. Veterinary assistant $8.03 11. Medical assistant $10.48 12. Dental assistant $11.60 13.
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The Interquartile Range (IQR) represents which of the following? A. the middle 25% of the distribution B. the upper 25% of the distribution C. the lower25% of the distribution D. captures the range of data, excluding the lowest 25% and the highest 25%

Explain the difference between the two primary types of data (Quantitative and Qualitative). List what types of studies lend themselves to each of these types of data. Which type of data do you prefer to work with, and why?

Although Joan found that a cell phone ring affected test scores, she also discovered that over half of the students in the control (no ring) condition wore earplugs while taking the test. This fact calls into question the ______

Consider imported goods that have a Duty Paid Value (DPV) of $1,375.60 CAD. If the duty rate is 7.5%, and GST applies, what is the amount of Field #42 of the B3? $123.80 $103.17 $178.82 $73.94 $68.78

Exhibit 1 ALUMNI GIVING Descriptions of Variables Variable Description ID An identifier running from 1 to 123 (schools are listed in alphabetical order) School Name of the school SFR Student-to-faculty ratio LT20 Percentage of classes with fewer than 20 students GT50 Percentage of classes with greater than 50 students GRAD Average six-year

Choose one of the following scenarios and explain your detailed process for solving. In addition to your solution, include in your post a response to the thought question posed. When replying to your peers this week, please reply to a student(s) who chose a different scenario than you selected. Options (Choose 1): Scenario 1: Hosting a lunch can

The value of using a longitudinal cohort design is that it provides which of the following? Group of answer choices The ability to select a defined population before any members of that population are exposed to the variable being studied A framework for the researcher to perform data collection over an extended period of time Increased power of

In a directional alternative hypothesis, ______. a) the two groups are equal on the dependent variable b) one group scores higher or lower on the dependent variable than the other c) the two groups do not differ on the dependent variable d) the two groups' scores on the dependent variable are not equal

2. Which statistical measurement is affected by outliers the most? Range Mean Mode Median

2. This regression model examines whether there is a linear relationship between one predictor variable and the outcome variable. A) Logistic regression model B) Multiple linear regression C) Simple linear regression D) Multiple logistic regression

What is the independent variable of : Online graduate students spend more time with their families than traditional graduate students

An urban economist is curious if the distribution in where Oregon residents live is different today than it was in 1990. She observes that today there are approximately 3,109 thousand residents in NW Oregon, 902 thousand residents in SW Oregon, 244 thousand in Central Oregon, and 102 thousand in Eastern Oregon. She knows that in 1990 the breakdown

Which category of diagnostic analytics techniques is DuPont analysis? Multiple choice question. Finding anomalies/outliers Drill-down analytics

give me a reference to my discussion post Mutually Exclusive Scenario: In a JDM car meet where there's a (Best Vintage JDM Car) competition and a (Best Modified JDM Car) competition, A car cannot win both competitions simultaneously. If it's a vintage car it shouldn't be modified and so it's only qualified for Best Vintage JDM Car title, same way

Consider the line 3,; = am + b in R2. Show that the point (x, y} = (331bp 311) is the closest point on the line to the origin. Hint: Let (I, y) be an arbitrary point on the line and minimize the squared distance from this point to the origin over all choices of x and y
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Roles are stated or unstated group expectations about how members should behave. Group of answer choices True False

a) Listed below are the average SAT scores for 21 schools in the Washington, D.C. school district. Find the five-number summary and construct the Box and Whisker plot. 1260 1120 1090 1270 990 980 1080 1090 1120 1310 780 820 1110 910 1120 1050 990 1300 1040 970 1010

3. For Pearson's correlation, if X increases Y increases, and when X decreases Y you don't know. Pearson's r should be close to which of the below value? R=0 R=1 R=-1 None of the above

Jeff sees online that 41 % of first-time brides in the United States are younger than their partner. If Jeff surveys a randomly select sample of 100 brides and finds that 52 of the brides are younger than their partner, what is the test statistic? Complete the formula for the z -statistic. z = p p SE p = , p = , and SE = (rounded to four decimal

Question 1 This question is a continuation of Question 1 where we ran SPSS on a data set to answer the research question:Will you conclude that a larger house corresponds to a higher selling price?Use a 5% level of significance. (The variable for selling price was split into two categories:"above the mean selling price (1) or not (0)".The variable

9. A co-ed soccer team has 9 women and 7 men on its roster. 6 players play on the field at one time. 2] a) What is the probability the starting lineup will have 3 men and 3 women on it? (3] b) What is the probability the starting lineup will have at least 5 men on it? [2] c) What is the expected number of women on the team? 10. A speed trap on the
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This table organizes 160 rivers with lengths over 1000 km by continent and length categories. Africa Asia Australia Eurasia Europe North America South America Total Less than 2000km 11 19 2 19 6 22 19 98 2000-3000km 4 6 0 9 1 6 10 36 More than 3000km 3 7 1 5 0 5 5 26 Total 18 32 3 33 7 33 34 160 What is the percentage of rivers with a length in

The distance traveled by students to school is normally distributed with an average distance of 5.85 km and a standard deviation of 1.25. The middle half of the traveled distances are between ______________ Question 17 options: a) 5.01 and 6.69 km b) 5.00 and 6.16 km c) 5.54 and 7.75 km d) None of the options e) 5.23 and 6.48 km

Government publications and official statistics are often seen as reliable and more trustworthy than other documentation such as a diary. What would not be a consideration when using government statistics? a. How complicated they are: can they be easily read and understood? b. What variables were included in the data used to produce the

Select all of the following that are NOT a question(s) to ask yourself when evaluating the testing of the null hypothesis? A. Is it appropriate to test the null hypothesis that two groups are drawn from the same population? B. Is it important to consider the design of the experiment? C. Is it important to consider the number and reliability of

In a dice game, you win $10 if you roll a 6, $5 if you roll a 4 or 5, and $0 if you roll a 1, 2, or 3. Calculate the variance of your winnings

A container contains 45 green tokens, 15 blue tokens, and 3 red tokens. Two tokens are randomly selected without replacement. Compute P(FiE). E - you select a green token first F the second token is non green P(Fi E) = (Simplify your answer. Type an integer or a fraction.)
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The Robin Hood Bank has noticed a decline in daily deposits. The average daily deposit has been running at 109 million with an average range of 15 million over the past year. The deposits for the past six days have been 110, 102, 96, 87, 115, and 106 million. a. What are the CL, UCL, and LCL for the and R charts based on a sample size of six days
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In English: Obtain the buffering factor, settlement time, peak time, lifting time and percentage of exceedance of the following transfer functions subject to a unit step entry En espaol: Obtenga el factor de amortiguamiento, tiempo de asentamiento, tiempo pico, tiempo de levantamiento y porcentaje de sobrepaso de las siguientes funciones de
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are two group and 3 group models examples of statistical modeling

One reason that we cannot establish causality from correlational research is that we cannot determine which variable is the cause and which variable is the effect. What is this problem known as? Reverse Causality Problem Third Variable Problem Causal Bias Problem of Causation

Data analytics relies upon: Question 8Select one: a. OLBP b. OLTP c. OLAP d. OLTP

Once in the GSS Data Explorer, choose at least two questions about attitudes, opinions, or behaviors about the topic you chose for your quantitative project. These variables are the dependent variables in your analysis. a. In a WORD document or directly in CANVAS. Describe these dependent variables How are the questions worded? Which years are you

Write the events as the set of outcomes. On a spinner with 4 equal sections, which are labeled yellow, red, green, and blue,We obtain yellow exactly twice in 3 spins

In the Results section for a study, comparing a sample of scores to a population value, we would include the ______. Group of answer choices type of statistical test computed, computed value of the test, its df and significance level, effect size, and practical significance descriptive statistics of our measurement, type of statistical test

If all factors remain the same, a(n) _______________ will narrow our interval estimate. Question 23 options: a) increase in margin of error b) increase in confidence level c) None of the options d) decrease in sample size e) decrease in confidence level

- Question 1 Convert the decimal fraction below to a decimal number. 1 point 24 100 as a decimal = NumberQuestion 10 Find the sum of the fractions below. If necessary, answer as an improper fraction in lowest terms. 1|Joint 3 14: 7+ 15 \"\"1 - Question 11 Round the number below to the nearest ten thousandths 1 point 9.51101 Answer = NumberQuestion
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Which of the following is true about one-way between subjects ANOVAs in SPSS? Group of answer choices You need to put your IV in the Grouping Variables box The descriptive statistics are given to you as a default. You can only get a means graph by using Chart Builder You can select from a number of different post hoc test options

What is the empirical rule? Group of answer choices only empirical data can be analyzed using statistics the 68% / 95% / 99.7% rule the 95.00% rule the larger the sample size the more the distribution approaches a normal distribution

Which of the following is TRUE about a two-factor analysis of variance? It conducts one hypothesis test and produces one F-ratio. It conducts two hypothesis tests and produces two F-ratios. It conducts three hypothesis tests and produces three F-ratios. None of the above are correct

Due to further evaluation of End of year test scores. It was determined Phonics instruction was lacking in Wonders 2017 curriculum. Word knowledge routines were developed to meet this gap

Complete the entries marked by the ANOVA table which has between and within rows and columns df, SS, MS, and F. We know that SS between is 89.036 and df between is (4-1) = 3 and df within is (48-4) = 44. In other words, find MS between, SS within, MS within, and F

Numerical Analysis Let (In) be a sequence in R where an + r ER and for all n E N. Show (Cn converges superlinearly to x if and only if Cn+1 - x lim = 0
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http://gss.norc.or.g/get-the-data/spssLink for the full 2018 GSS data Come up with a simple theory. Then state the null and the research hypotheses, and then use the regression analysis to test your hypotheses. In this project you will have to choose the following 4 variables: 1. One dependent and two independent variables measured at the
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Evaluate 1 11 14 10 6 24 A 4 1/2 B 3 17/24 C 3 3/8 D 4 5/9
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Write a question that compares two groups on an outcome. You may also use the DB to seek help for assignment #6

Opt-in Group: 55 total - 23 donors = 32 non-donors. Opt-out Group: 50 total - 41 donors = 9 non-donors. Neutral Group: 56 total - 44 donors = 12 non-donors. Sum the Totals for Each Row and Column: Total Organ Donors: 23 (Opt-in) + 41 (Opt-out) + 44 (Neutral) = 108. Total Not Organ Donors: 32 (Opt-in) + 9 (Opt-out) + 12 (Neutral) = 53. Total

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