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Mathematics Questions and Answers May 26, 2023

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An experiment consists of 8 independent trials where the probability of success on each trial is 3/8 Find the probability of obtaining the following. Round answers to the nearest ten-thousandth. 24. At most 1 success. a. 0.8650 b.0.9944 c.0.0506 d. 0.7480 e.0.1350

The National Muffler Company claims they will change your muffler in less than 30 minutes. An investigative reporter for WTOL Channel 11 monitored 30 consecutive muffler changes at the National outlet on Liberty Street. The number of minutes to perform changes is reported below: \f
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13. To the left of z = - 1.39
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A poll of 1070 teens ages 13 to 17 finds that 750 have received personal messages online fromsomeone they don't know. 1.Find the sample proportion who have received a personal message online from someone they don't know. 2.Find the margin of error. 3. What is the confidence interval? 4.Writea 95% confidence statement:

Standard-Of-Care Experimental Treatment Treatment Total (Truvada) (Cabotegravir) HIV infections 52 39 13 Participants 4,494 2,250 2,244
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DATA SET: ID Age Activity level Pet Ownership Sleep Resting HR Post Workout HR 1 50 or older Active Cat 5.0 65 128 2 50 or older Active Dog 9.0 57 140 3 50 or older Active Dog 7.0 53 94 4 50 or older Active Dog 9.5 58 126 5 50 or older Active Cat 6.0 74 142 6 50 or older Active Dog 10.0 48 121 7 50 or older Active Dog 6.0 66 125 8 50 or older

(Normal Distribution) The distribution of weekly incomes of PSWsfollows the normal distribution, with a mean of $1,000 and a standard deviation of $100. What is the probability of selecting a PSW whose income is less than $790?Express your answer to the nearest whole percent.Do not enter the percent sign.Sample input:34 (for 34%chance).

Jenni earned an 86 on her statistics final and an 88 on her chemistry final. In the statistics class the mean was 75 with standard deviation 8. In the chemistry class the mean was 70 with standard deviation 11. Convert her two test scores to standardized scores and use them to explain which of her grades was higher with respect to the rest of the

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1.Part 1: For a fixed sample size: as the number of independent variables in a regression model increases, the power of the regression ___ a)increases b)decreases Part 2: When a potential confounding variable is found to affect the -coefficient estimate for the variable of interest in a regression model and is therefore added to the model, the

Exponential Function Attributes and Notes What are the vertical asymptote (VA) and horizontal asymptote (HA) of the function, f(x)=25^(x+2)+7

In general, it is easy to identify the trend component of a time series by using: a. exponential smoothing b. moving averages c. regression analysis d. seasonally adjusted time series

Two statistics students wanted to know if including additional information in a survey question would change the distribution of responses. To find out, they randomly selected 30 teenagers and asked them one of the following two questions. Fifteen of the teenagers were randomly assigned to answer Question A, and the other 15 students were assigned

Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 154 adult males, the mean pulse rate is 70.1 bpm and the standard deviation is 11.1 bpm. Find the value of the test statistic.

write an Analysis paragraph: Analyze the data. Look for patterns, trends, or anomalies in the excel document. There are 5 students with IEPs, which is 10% of the students. Include how great inflation for them could impact the predictive outcome and correlation data because they have accomodations

How much water drank per day (cups) How much exercise per day (min) 8 20 4 0 10 15 9 45 5 0 6 30 Is there a correlation between how much water people drink and how much exercise they do? Use a hypothesis test to test this relationship. Complete all 4 steps.

Design a 3- or 4-question survey to collect data related to the evaluation questions for a drug program

Write the pdf in one-parameter exponential family form. Give an example where such a response variable might occur. Identify the canonical link function. Give the mean and variance of the resulting dependent variables. a) Gamma r() exp(-Ay) [10 marks] hi Negative binomial
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In an experiment that follows principles of representative design, it is a. acceptable to observe what students are doing during the experiment. b. not acceptable to observe what students are doing during the experiment. c. "acceptable to observe the research participants, but not the social context in which the experiment is being conducted." d.

In Asch's Line study, people were more likely to agree with the group when _____. Question 8 options: a) they were confident about the answer. b) they were deeply invested in being correct. c) they were asked first. d) they were asked last

A university offers 34 major degrees. There are 17 full-time majors in STEM, 6 part-time majors in STEM, 8 full-time majors in humanities, and 3 part-time majors in humanities. I am going to choose a random major to attend in this university. What is the probability it is in humanities, given that it is part-time

Cierta compaa de seguros hall que alrededor de uno de cada mil cheques son girados con fondos insuficientes. Adicionalmente 1 de cada mil es girado con fondos insuficientes y estn posfechados. La misma compaa tambin determin que alrededor de uno de cada 100 cheques girados con fondos suficientes estn posfechados. Si se recibe un cheque posfechado,

Is it "unusual" to get a 12 when a pair of dice is rolled?

Assume that adults have IQ scores that are normally distributed, with a mean of 102 and a standard deviation of 16. Find the probability that a randomly selected individual has an IQ between 81 and 109. Choose the correct value: Choose one 10 points 0.5647 0.5749 0.5747 0.5649

A classroom of 20 students has an average test grade of 78 points. Two new students were admitted to the class, and after these students took the test, the average of the class was 75 points. What was the score of the last student to take the test if the first newly admitted student scored 45 points

The table shown to the right summarizes the outcomes of a study that students carried out to determine whether humanities students had a higher mean GPA than science students. Identify both of Mean GPA the variables, and state whether they are numerical or categorical. If numerical, state whether they are continuous or discrete. Science rim

Which of the following is considered to be a company town? Question 41 options: a) Riverside, Illinois b) Forest Hill, Illinois c) Forest Gardens, NY d) Pullman, Illinois

A sample of n = 20 scores has a mean of M = 32 and a standard deviation of s = 6. In this sample, what is the z -score corresponding to X = 28?

The sum of the deviation scores used in the calculation of the variance and standard deviation will always be which number

Q1.An election poll for the state of Maryland is conducted to determine which of three potential candidates for governor the registered voters prefer.A researcher randomly selects 350 registered voters from across the state and asks which candidate they would choose.Using the definitions provided in the text, state the individual, variable,

Need some help A modified roulette wheel has 36 slots. One slot is 0, another is 00, and the others are numbered 1 through 34, respectively. You are placing a bet that the outcome is an even number. (In roulette, 0 and 00 are neither odd nor even.) . What are the actual odds against winning? The actual odds against winning are
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Use finalize_workflow() and fit() to fit your chosen model to the entire training set. Lastly, use augment() to assess the performance of your chosen model on your testing set. Compare your model's testing ROC AUC to its average ROC AUC across folds.Lastly, use augment() to assess the performance of your chosen model on your testing set. Compare

I need the DOI (digital object identifier) and sources to access the following references: (My university library does not access to these journal articles but I still want to use them for my qualitative study on cancer patients' experiences undergoing chemotherapy. Research Project: Literature Review Template Name: Ronald Dean Clarke Jr. Citation

G. If your SAT score put you into the 16* percentile, how many standard deviations away from the mean was your score
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Explain the differences between the singletest, the independenttest, and the paired samplestest. State the assumptions of each one and compare how they are different. Most importantly, how are the variables different (the amount and type of variables) between the three tests? Provide a real-world example of when you would use a single t-test, the

For the density function in Exercise 7-3, find the median and x .80 \f
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Find the area in square units to the nearest thousands of the standard normal distribution of the left z=-1.49 in square units

A researcher studying the relationship between maternal age and length of breastfeeding in a sample of 75 primiparas found a correlation of .19, which was not statistically significant at the .05 level. What was the estimated power of the statistical test? 0.40 Conversely, what was the risk that a Type II error was committed? 0.60 If .19 is a good

The length (in km) of a random sample of New Zealand (NZ) rivers that travel to the Pacific Ocean and the lengths (in km) of a random sample of New Zealand rivers that travel to the Tasman Sea are given in the table below. Do the data provide enough evidence to show on average that the rivers that travel to the Pacific Ocean are longer than the
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STAT 200 Week 4 Homework Problems 6.1.2 The commuter trains on the Red Line for the Regional Transit Authority (RTA) in Cleveland, OH, have a waiting time during peak rush hour periods of eight minutes ("2012 annual report," 2012). x = waiting time during peak hours Find the height of this uniform distribution. Find the probability of waiting

MUESLIVII V ( 1 PUIly Match the Symbol with the correct phrase. Reduced 6 1.
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Find the interval of convergence for each of the following power series. \f
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In an experiment that follows principles of representative design, it is acceptable to observe what students are doing during the experiment. not acceptable to observe what students are doing during the experiment. "acceptable to observe the research participants, but not the social context in which the experiment is being conducted." not

James takes two data points from the weight and feed cost data set to calculate a slope, or average rate of change. A hamster weighs 3 pounds and costs $3.50 per week to feed, while a Chihuahua weighs 4.8 pounds and costs $6.20 per week to feed. Using weight as the explanatory variable, what is the slope of the line between these two points?

What is a solution to minimizing errors when doing multiple statistical comparisons? A. Change the p-value threshold B. Making more stringent requirements for rejecting the null hypothesis C. Conducting an even number of multiple comparisons D. Making a Bonferroni correction

Which of the following is true about two sample t-tests? select all that apply A. It does not use null distributions to estimate a p-value B. It compares 2 populations C. It is useful when comparing the effects of two treatments

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According to the Gilbert textbook, which of the following is true concerning the rule that asserts that people need 10 years and 10,000 hours of deliberate practice in order to become an expert. Group of answer choices Recent research confirms that the rule is correct. Most people need significantly more than 10,000 hours in order to become an

need help on this one Refer to the accompanying scatterplot. Examine the pattern of all 10 points and subjectively determine whether there appears to be a strong correlation between x and y. Click here to view a table of critical values for the correlation coefficient. 10- 10 Do the data points appear to have a strong linear correlation? O No O Yes
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A newspaper poll of 300 people stated that 53% were in favor of a recycling program. It also said that 70 %of the men and 40% of the women polled favored the program. How many men favored the recycling program

At a particular restaurant the mean time for a customer to wait for a table is 16.3 minutes with standard deviation 5.8 minutes a) if a sample of 45 customers is considered what is the probability that their mean wait time x is between 15 and 18 minutes? b) Why can we the CLT for this question?

stion Code: P^(31310) Evaluation Status : Incorrect!!! Given f(x)=2x^(3)+7x^(2)-5x-4 and that -4 is a zero of f(x), which of the following is a factor of f(x) ? Only Typing answer Not a picture

Describe how a normal or Poisson distribution was used in the scenario in the article. Explain why a normal or Poisson distribution was used over the other type of distribution. Reflect on how you can personally use this information in your everyday life, and explain the impact it has on your perspectives.

The closing stock price of Amazon.com, Inc. for the past 9 days is shown: 86, 88, 87, 86, 85, 90, 93, 82, 89 To find in detail Mean, standard deviation, median, IQR, Mode and Range . this is all I want to find as it is part of question. kindly help me out. Thanks!

Contrast the tabular and graphical methods used for qualitative and quantitative data. Summary of qualitative data Summary of quantitative data Contingency table Graphical representation of data histogram frequency distribution bar graph Pie chart Histogram Ogive Contrast the tabular and graphical methods used for qualitative and quantitative

A window has the shape of a semi-circle placed on top of a rectangle. Express the areaof the window in terms of the width

What is the sample variance and standard deviation to 18,12,2,8,10

A sample of 20 F-1 Drivers clock an average speed of 355 kmph with a sample standard deviation of 25 kmph. Calculate a 99% confidence interval, assuming that the population is normally distributed. What is the upper bound of the interval (round your answer to two decimal places)

Please show me step by step. I worked on A- C but stuck on D question. x(games played) 4 5 6 7 Frequency 19 11 21 23 (d) How do i Compute the standard deviation of the random variable x. x= __________ games

Consider a study testing the hypothesis that, on average, individuals who take a new drug will remember more words in a recall memory test than those given a placebo. The following scores, which measure the number of words remembered, are provided for individuals in each group. Drug Group: 7, 9, 8, 9, 8 Placebo Group: 5, 7, 6, 8, 9, 7 Assume that

flood certified adjusters are required to attend approved NFIP certification presentations true or false (is-1104)

Show work 13. Find the z-score corresponding to X = 105 and the X value corresponding to z = +0.40 for each of the following populations. a. U = 100 and o = 12 SHOW ANSWER b. u = 100 and 0 = 4 SHOW ANSWER C. J = 80 and o = 14 SHOW ANSWER d. p = 80 and q = 6 SHOW
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A group of 3 students is to be chosen from a 29-member class to represent the class on the student council. How many ways can this be done?

A researcher tested the relationship between gender and support for assisted suicide ("death with dignity") and found a Cramer's V of 0.45. This relationship is A. strong. B. weak. C. positive. D. significant but not important.

The A-B-A-B design a. avoids the problem of ending an experiment with withdrawal or reversal of the treatment. b. eliminates the possibility that an observed treatment effect will be dependent on the particular baseline conditions included in the experiment. c. has lower internal validity than the A-B-A design. d. all of the above.

If the volume of a certain pyramid isx and another pyramid is made which is4 times larger (that is, all the linear dimensions have been increased by a factor of4), what is the volume of the new pyramid (in terms ofx)?

There are 24 employees at a company. How many ways are there to select 5 employees for a group project?

Assume the average steps taken by college students was exactly 7,568 and the median steps take was 8,432. Using this mean and median, we know what about the distribution of these scores? There is a negative skew There is a positive skew There is relative skew There is not enough information to answer this

5 options: Tin collects data from a random sample of 52 psychology honours thesis students to find out if taking a theatre course improves their public speaking skills. Typically, thesis students get a mean grade of =7.8 ( = 3) for their thesis proposal presentations. Tin's sample of students who took the theatre course, however, get a mean grade

Self-Service Checkout Sales Employee Operated Checkout Sales Mean 36,709.11 46,995.93 Variance 56,334,320.66 398,979,967.20 Observations 180.00 180.00 Pooled Variance 227,657,134.93 Degrees of Freedom 358.00 Standard Deviation 7,505.62 19,974.48 18,152.81 Hypothesized Mean Difference -10,286.82 T Stat -6.47 Is there a difference between the sales

9. A survey was conducted regarding the new policy on lunch time in a certain corporate. Forty-six out of one hundred people who participated in this survey support the new policy. Estimate the standard error of the estimated proportion of employees in the corporate supporting the new policy (round off to second decimal place).

Expand the following using the binomial theorem of Pascal's Triangle. a. (x + y) 5 b. (3x + y) 3 c. (5x 2y) 5

A researcher records the sound (in decibels) during a series of lessons taught by a substitute teacher at a local elementary school. In his study, he found that the sound was 806 (MSD) decibels. Assuming the data are normally distributed, which of the following is an appropriate conclusion? (Sample mean=M=80, and Standard deviation=SD=6) A) 68% of

Hey I'm having a hard time with this question, thanks for helping There is nothing missing actually, that why i needed help. Thanks Suppose you flip a coin three times. For every head, you receive two points, and for every tail, you lose one point. a) Develop the sampling distribution for the mean number of points you receive from flipping a coin

A bag contains 7 green marbles, 5 red marbles, 4 blue marbles. If one marble is drawn from the bag and not replaced, what is the probability of drawing a green marble then a blue marble?

There are n balls in a box, three of which are red. Suppose that three balls are randomly drawn without replacement and two of them are red. If the probability of this occurring is 15/56, calculate n.

The average amount of a beverage in randomly selected 16-ounce beverage can is 16.18 ounces with a standard deviation of 0.4ounces. If a random sample of sixty-five 16-ounce beverage cans are selected, what is the probability that the mean of this sample is less than 16.1ounces of beverage? Answer: (round to 4 decimal places)

Find the percent of the area in the region (z| > 1.05. % (Round to two decimal places as needed.)
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A study of the ages of motorcyclists killed in crashes involves the random selection of 162 drivers with a mean of 33.92 years. Assuming that =11.6 years, construct and interpret a 90% confidence interval estimate of the mean age of all motorcyclists killed in crashes. What is the 90% confidence interval for the population mean ? < < (Round to two

X1, X2, X3, X4, X5, X1X2 AND X1X3 effects are studied at two levels to maximize Y. a)Analyze data using repsonse tables. plot main and interaction effects. b) Construct the appropriate math model using the response table

Given the following estimates of peak flow from an ensemble of 10 temporal patterns, what is the design flow? Q = 83.1 75.8 56.2 41.5 86.9 55.9 94.5 81.1 56.3 44.8

In the 2015 AFC championship game, there was a charge the New England Patriots underinflated their footballs for an advantage. The balls should be inflated to between 12.5 and 13.5 pounds per square inch. The accompanying data consists of eleven of the twenty-two measurements on the Patriots' footballs. Complete parts a and b. 11.10 11.00 10.85
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find the volume of the solid formed by rotating the graphs of y=sin x, y=cos x, x=0 and x=pi/4 about the x-axis

Find the area of the parallelogram determined by the vectors v and w where v=2i+3k and w=2j3k AREA =

A students earned grades of A, C, A, A, and B those courses had these corresponding numbers of credit hours: 2, 5, 3, 2, 3. The grading system assigns quality points to letter grades as follows: A =4, B= 3, C=2, D=1, and F=0 Computer the grade pint average ( and round the result to two decimal plac

Find the equations of the two tangent lines to the graph of f that pass through the indicated point. f(x)=8x-x^2 Find the equations of the two tangent lines to the graph of f that pass through the indicated point. f(x) - 8x - x2 18 16 10 line with positive slope, y = X line with negative slope, y
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Set theory homework Score: 0 of 1 pt 2.1.41 Express the following set in set-builder notation B = (2. 3. 4, 5 6. 7 8 9] Choose the correct set O A. B = [x | xEN and 2
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A researcher records the following number of bird calls made during an experimental session with robins: 7.20.6 (MSD). Assuming these data are normally distributed, what is the probability that robins made more than 9 bird calls during this experimental session? (The sample mean is M=7.2 and SD=standard deviation=0.6) A) .9987 B) .4987 C) .0013 D)

Why is rotation applied during principal component analysis or factor analysis? Group of answer choices To make factor solution easier to interpret To make eigenvalues larger To make communalities larger To improve sphericity and sampling adequacy

What is a variable that is not among the explanatory or response variables in a study and yet may influence the interpretation of relationships among those variables? What is a variable that is not among the explanatory or response variables in a study and yet may influence the interpretation of relationships among those variables? outlier

Use the following sample and test that the population mean for rolling a single die is 3.5. mean:3.24 median: 3 mode: 4 variance: 2.3494 standard deviation:1.5328

Dear tutor, the answer should be clear. Thank you!!! Question 4. Let1,2, and3be independent lifetimes of memory chips. Suppose that eachhas the normal distribution with mean 300 hours and standard deviation 10 hours. Compute the probability that at least one of the three chips lasts at least 290 hours.

Consider a single-server queueing system that can hold a maximum of two customers excluding those being served. The server serves customers only in batches of two, and the service time (for a batch) has an exponential distribution with a mean of 1 unit of time. T

A casino offers a new gamble. A savvy gambler, after carefully evaluating the game, concludes that the earnings and respective probabilities are as follows: Outcome Probability -11 dollars 0.3 5 dollars 0.6 9 dollars 0.1 For assignment 3, you should know that its expected value is 0.6 dollars. suppose you have to pay 1 dollar to play that gamble.

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A logistic function is a function of the formA1+Bect , whereA,B,c are constants. Given the logistic function s(t)=151+Be4t, calculate the constantB iff(0)=2 .

Diameter |Strength 4.2 51 4.4 54 4.6 69 4.8 81 5.0 75 5.2 79 5.4 89 5.6 101 5.8 98 6.0 102
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