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Mathematics Questions and Answers April 02, 2023

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Based on the performance of all individuals who tested between July 1, 2013 and June 30, 2016, the GRE Quantitative Reasoning scores are normally distributed with a mean of 152.57 and a standard deviation of 9.02. (https://www.ets.org/s/gre/pdf/gre_guide_table1a.pdf). (a) Consider all random samples of 64 test scores. What is the standard

Final Exam with numbers and answer choices removed Module # in red below The numbers given were replaced by X1, X2, X3, etc 1. Find the number of successes X1, suggested by the given statement: A computer manufacturer randomly selects X2 of its computers for quality assurance and finds that X3% of these computers are found to be defective. 2 2. In

Refer to Example 4.40. An urn contains seven red balls, seven white balls, and seven blue balls, and sample of four balls is drawn at random without replacement. Compute the probability that all of the balls in the sample are the same color. (Round your answer to four decimal places.

No. 2 week5-week7 Student Full Name:___________________________________ . Student ID:__________________________________________ . CRN No:____________________________________________ . STATISTICS (STAT-101) Branch: _____________________________________________. Total Points True/False ____/6 MCQ ____/6 Short Answer ____/18 Total ____/30 Good Luck

. Now she's going to run a correlation test to see if this association is statistically significant.The results are below: Correlations Bullying behaviors Test score Bullying behaviors Pearson Correlation 1 -.759 Sig. (2-tailed) .000 N 20 20 Test score Pearson Correlation -.759 1 Sig. (2-tailed) .000 N 20 20 Based on this information, what can the

1. World Population Growth (9 points) Year Population 1927 2 1960 3 1974 4 1987 5 1999 6 2012 7 a)Use Excel to make a scatterplot of the following data showing the world's population growth in billions. Then find the best-fit regression line and the best-fit exponential function and add these to your chart. b)Use Excel to find the correlation

4.Members of a freshmen orientation class take a time management test. Their average time management score is 82, and the standard deviation for their scores is 6. Using the formula for M , what will M be when a.the sample size is 25, b.the sample size is 36, and c.the sample size is 49?

1._____ is the branch of statistics that involves drawing conclusions about a population based on information contained in a sample taken from that population. a.Inferential statistics b.Mathematical statistics c.Descriptive statistics d.Organizational statistics e.Traditional statistics 2 As a part of his study, a researcher is interested to

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A random sample of 1414 college women and a random sample of 1919 college men were separately asked to estimate how much they spent on clothing in the last month. The accompanying table shows the data. Suppose the null hypothesis that the mean amount spent by men and the mean amount spent by women for clothing are the same could not be rejected

Data collected over an extended period of time shows that women college soccer players have a relatively high rate of concussions , often with life-changing consequences. See Stanford Star Retires and Concussions Derail Promising Careers . For collegiate women soccer players the concussion rate is .63 per 1,000 player participation hours (

If the demand function for a commodity is given by the equation:550p +q =86,000where p is the price per unit;at what price per unit is unitary elasticity achieved?Unitary elasticity is achieved when p=_____?

1.) According to the Almanac of Questionable Statistics, Vol 4 (2012), the probability of a mass squirrel uprising in any given year is 0.49 and the probability that cats and dogs will sign a peace treaty allowing them to live together peacefully in any given year is 0.25.If we presume that these two events are independent, what is the probability

One research study of illegal drug use among12- to17-year-olds reported a decrease in use(from 11.4% in1997) to 9.9 % now. Suppose a survey in a large high school revealsthat, in a random sample of 1,044 students, 93 report using illegal drugs. Use a 0.05 significance level to test theprincipal's claim that illegal drug use in her school is below

A population has m = 60 and s = 30. For a sample of n = 25 scores from this population, a sample mean of M = 55 would be considered an extreme value. True False

How old are college students? The national age distributions for college students are shown below. The Western Association of Mountain Colleges took a random sample of 212 students and obtained the sample distribution listed second. Is the sample age distribution for the Western Association of Mountain Colleges a good fit to the national

The following data were collected as part of a study of coffee consumption among undergraduate students. The following reflect cups per day consumed:5 3 1 2 0 4 3 1 2 2 0Generate atwo-sided95% confidence interval for the mean number of cups of coffee consumed. a. (-1.43, 5.61) b. (1.99, 2.19) c. (1.00, 3.18) d. (1.05, 3.13) e. (1.03, 3.15)

What is the simple interest charged on a 2 month loan of $7,600 is $114. What is the rate whole amount using % sign? What expression represents the balance after 7 years at an interest rate of 5% compounded annually for the principal of $1000? A loan of $50,000 at 7% is due in 16 months. Find the present value of the loan if the time value of

let the random variable x represent the number of girls in a family of three children. construct a table describing the probability distribution, then find the mean and standard deciation

What are the advantages and disadvantages of withdrawing groundwater? Describe the problem of groundwater depletion in the world and in the United States, especially in the Ogallala aquifer. Describe ways to prevent or slow groundwater depletion. What is a dam? What is a reservoir? What are the advantages and disadvantages of large dams and

For a standardized normal distribution, calculate the following probabilities: a. P(z <1.5) b. P(z > 0.85) c. P(-1.28

Some researchers wish to compare how students at two different schools perform on an IT test. They randomly select 40 students from each school and obtain their test scores. They pair the first score from school A with the first school from school B, the second score from school A with the second school from school B and so on. They then perform a

An ancient Greek was said to have lived one-fourth of his life as a boy, one-fifth as a youth, one third as a man, and spent the last 13 years as an elderly gent.How old was he when he died? A. 25 years B. 31 years old C. 44 years old D. 60 years old E. 57 years old F. 29 years old G. 51 years old H. 78 years old I. 70 years old J. 90 years old

On average, 3 percent of all persons who are given a breathalyzer test by the state police pass the test (blood alcohol under 0.08 percent). Suppose that 400 breathalyzer tests are given. (a) What is the expected number who pass the test? (Round your answer to the nearest whole number.) Expected number 12 (b) What is the approximate Poisson

A new company is in the process of evaluating its customer service. The company offers two types of sales: (1) Internet sales and (2) store sales. The marketing research manager believes that the Internet sales are more than 10 percent higher than store sales. The null hypothesis would be: P Internet - P Store 0.10 P Internet - P Store >0.10 P

Leavus Jeans company sells watches all over the US. The jeans are assembled in a plant with two lines. Historical data shows that each pair of jeans coming off line I, independently of the others, is free of defects with a probability of .98. The similar probability for line II is .99. Each line produces 500 pairs of jeans per hour. The manager of

Question 13: Statistics (Scatter plots & Correlation) *Please assist in providing the most accurate and confident answer to this question The following data show the fat intake (x) mg. and cholesterol (y) mg. for 10 males ages 24-29. A dietician would like to establish a strong positive linear correlation between the variables. x: 28 | 32 | 35 |

In a poll,597of 1007adults surveyed said they wanted to lose weight. a. What percentage of the sample wanted to lose weight? b. Find a 95% confidence interval for the proportion of people in the population who wanted to lose weight. c. Would a 99% confidence interval be wider or narrower?

Three loaded dice and five fair dice are in a bag. 3dice are picked from the bag without replacement. a. Write the probability distribution for the number of loaded dice in the sample. b. What is the expected value for the number of loaded dice in the sample?

Use SAS for analysis. Assignment Detail..... I have selected Mayonnaise as the product category for analysis and Metropolitan Chicago as the market. The data set provides information on weekly unit sales and marketing activity for the two leading national brands of ketchup (Hellman's and Kraft). In order to keep things tractable, I've restricted

Compute the 90% confidence interval for population mean based on the following sample data: 8, 11, 12, 16, 20, 27, 31, 35.

question 29 Life tests performed on a sample of 13 batteries of a new model indicated: (1) an average life of 75 months, and (2) a standard deviation of 5 months.Other battery models, produced by similar processes, have normally distributed life spans.The 98% confidence interval for the population mean life of the new model is _________.

A study is made by the recording industry in the United States of the number of music CDs owned by senior citizens and young adults. The information is reported below. Seniors 28 35 41 48 52 81 97 98 98 99 118 132 133 140 145 147 153 158 162 174 177 180 180 187 188 Young Adults 81 107 113 147 147 175 183 192 202 209 233 251 254 266 283 284 284 316

6. Consider H0: = 45 versus H1: < 45. A random sample of 25 observations produced a sample mean of 41.8. Using = .025 and the population is known to be normally distributed with = 6. What is the value of z? Round to two decimal places. Would you reject the null hypothesis? Reject Ho Do not reject Ho

3 week 9-week 11 Student Full Name:___________________________________ . Student ID:__________________________________________ . CRN No:____________________________________________ . Branch: _____________________________________________. Total Points True/False ____/6 Short Answer ____/18 Total ____/30 STATISTICS MCQ ____/6 (STAT-101) Good Luck

PSY 07202: Statistics in Psychology Assignment 11: SPSS Assignment 2 This assignment is designed to give you practice choosing the appropriate test statistic based on experimental design. You will gain practice calculating the test statistics using SPSS for different research questions that involve comparing means using t-tests. You will need to

1 2 3 4 Directions: View "Calculating Chi-square in SPSS." Open SPSS and perform the following: Enter the data from the table below. Obtain an output (as in the tutorials). In the output document highlight the cross-tabulation table. Submit the highlighted output and narrative explanation to your instructor. Drug Quit Topiramate yes Topiramate no

We have created a 95% confidence interval forwith the result (10, 15). What decision will we make if we testH 0 := 16 versusH 1 :16 at= 0.10? RejectH 0 in favor ofH 1 . AcceptH 0 in favor ofH 1 . Fail to rejectH 0 in favor ofH 1 . We cannot tell what our decision will be from the information given.

The following data represent the weights (in grams) of a simple random sample of a candy. 0.920.92 0.900.90 0.900.90 0.930.93 0.920.92 0.860.86 0.930.93 0.860.86 0.800.80 0.890.89 Open in StatCrunch + Copy to Clipboard + Open in Excel + Determine the shape of the distribution of weights of the candies by drawing a frequency histogram and computing

Suppose P(A|B) = P(A), P(A and B) = .36, and P(A) =.9 .What is P(B) ? a. 0.004 b. 0.04 c. 0.4

A researcher would like to determine if there is a strong negative linear relationship between two variables. The alternate hypothesis is..

explain how well the person work the problem 2.The Metropolitan Bus Company claims that the mean waiting time for a bus during rush hour is less than 5 minutes. A random sample of 20 waiting times has a mean of 3.7 minutes with a standard deviation of 2.1 minutes. At = 0.01, test the bus companys claim. Assume the distribution is normally

What is the approximateminimumpercentage of data inanyfrequency distribution that lies within 3 standard deviations of its mean? a. 75% b. 89% c. 99.7%

To compute a confidence intervalfor the mean, population standard deviation unknown, n = 25, and = 0.10, enter the critical value with 3 decimal places

Compare the mean and standard deviation for the Coin variable (question 2) with those of the mean and standard deviation for the binomial distribution that was calculated by hand in question 5. Explain how they are related in a short paragraph of several complete sentences. Question 2. mean is 3.882 and the SD is 1.629 Calculate (by hand) the mean

Suppose that you and two friends go to arestaurant, which last month filled approximately 90.9% of the orders correctly. What is the probability that at least two of the three orders will be filledcorrectly?

The data in the accompanying table are from The Chronicleof Higher Education. Entries in the table are thenumber of people enrolled in college in2011per100,000people for39countries.For example,in the United States,there were6585college students for every100,000people in the country. Use StatKey to construct a histogram.Describing the
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A bank is attempting to determine where its assets should be invested during the current year. At present, $500,000 is available for investment in bonds, home loans, auto loans, and personal loans. The annual rate of returns are shown in the table below. Investment Annual Rate of Return Bonds 10 % Home Loans 16 % Auto Loans 13 % Personal Loans 20

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Fail to Reject the Null Hypothesis Reject the Null Hypothesis Type 1 =false positive, Power=true negative, type 2=false negative. Im looking for the answer for a true positive. Is it a type 1 or type 2

The random sample shown below was selected from a normal distribution. 9 , 5 , 7 , 3 , 3 , 9 Copy to Clipboard + Open in Excel + Complete parts a and b. a. Construct a 90 % confidence interval for the population mean mu.

If a particular result is statistically significant at the 0.20 level, must it also be statistically significant at the 0.05 level? Why or whynot?

The number of hardware failures X of a computer system in a week ranges from zero to six. The number of hardware failures observed over a year revealed that 9 of the 52 weeks had no failure 14 of the 52 weeks had 1 failure 13 of the 52 weeks had 2 failures 9 of the 52 weeks had 3 failures 4 of the 52 weeks had 4 failures 2 of the 52 weeks had 5

TABLE 1014 The amount of time required to reach a customer service representative has a huge impact on customer satisfaction. Below is the Excel output from a study to see whether there is evidence of a difference in the mean amounts of time required to reach a customer service representative between two hotels. Assume that the population

Hi. Could you please help me these questions. Thanks Question 1 An item was purchased while on sale, with a net price of $714.40 and discount amount of $209.90. Calculate the following. a. Calculate the list price of the item. Round to the nearest cent b. Calculate the discount rate. Round to two decimal places Question 2 A restaurant purchased a

An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars over domestic. Suppose a sample of 484 new car buyers is drawn. Of those sampled, 174 preferred foreign over domestic cars. Using the data, estimate the proportion of new car buyers who prefer foreign cars. Enter your answer as a fraction or a decimal

Ichabod runs a clothing storein London.He recently purchased1,000 dress shirts that had a manufacturer's list price or $45 per shirt.On each shirt there was a trade discount of 10%, 8% and 6% from the manufacturer.Ichabod's store has operating expenses that are 35% of the selling price and the rate of markup is 60% of the selling price. What was

Fail to reject the null Reject the Null Hypothesis hypothesis xxxxxx Type 1 True positive False Positive Type II Power False Negative True Negative Not sure, which a true positive is either a type 1 or type 2 error. I need help with the XXXX portion of this question.

The response time in miliseconds was determined for three difference types of circuits that could be used in an automotive valve shutoff mechanism. The results from a completely randomized experiment are shown in the following table: Circuit Type 1 2 3 9 20 6 12 21 5 Response Time 10 8 23 17 8 16 15 30 7 (a) Test the hypothesis that the three

Find the values of x such that the given series would converge. (1 pt) Find all the values of x such that the given series would converge. E (-1)"x" n=1 11" (n2 + 4) The series is convergent from x = , left end included (enter Y or N): to * = , right end included (enter Y or N)
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A population of N = 10 scores has a standard deviation of s = 2. What is the value of SS, the sum of the squared deviations, for this population? 40 20 4 2

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mean for Attitude Toward Internet 5.4 median for Attitude Toward Internet 5.5 Would you report "the mean" or "the median" or both "the mean and median" in a research report for Attitude Toward Internet? Present a statement that presents one or both of the averages for Attitude Toward Internet.

1) Given the following period data which of the following would be the correct Mean Absolute Deviation (MAD)? Period 1 the demand is 141, the forecast is 138, the absolute value of the error term is 3, the absolute value of the error term squared is 9 and the absolute percentage error is 0.0213; Period 2 the demand is 138, the forecast is 139, the

What is an example,using the pharmaceutical industry, for testing a hypothesis either using one-way ANOVA or two-way ANOVA both in English version and mathematically, i.e. Ho and Ha along with appropriate population parameter? At what level of sigwould Iperform the test?Suppose if you have rejected your hypothesis, then of these three methods,

County Alpine Andrews Angelina Appling Arapahoe Atlantic Austin Bailey Ballard Bastrop Baylor Bee Belmont Benewah Benton Borden Bosque Bowie Brazoria Brazos Brewster Briscoe Brooks Brown Burleson Butler Caldwell Calhoun Callahan Calumet Camp Carson Casey Castro Charles Cherry Chilton Clinton Cochise Coke Coleman Collin Collins Colorado Median

Find the quotient and remainder using long division. x 3 x 1 x 2 x3-x-1x-2

When comparing if to conduct a z-statistic or a t-statistic test, which condition must be met to conduct a test for the difference in two samples means using a z-statistic? A. Samples are dependent b. Populations must be normal c. Data must be at least of nominal scale d. Standard deviations of two populations must be known.

On average, 55 percent of U.S. beer drinkers order light beer. (a) What is the probability that none of the next eight customers who order beer will order light beer? (Round your answer to 4 decimal places.) Probability (b) What is the probability that one of the next eight customers who order beer will order light beer? (Round your answer to 4

1A(n) _____ is a number that summarizes some aspect of the sample data. a.residual b.statistic c.sample d.population e.parameter 2 Consider the data: {2, 5, 0, 8, 8, 1, 3, 4, 3, 4, 8, 8, 0}. Identify the data with the maximum frequency. a.2 b.0 c.8 d.1 e.3 3 _____ is a collection of methods for collecting, displaying, analyzing, and drawing

1. Use the following data to answer Questions 1a and 1b. Total no. of problems correct (out of a possible 20) Attitude toward test taking (out of a possible 100) 17 94 13 73 12 59 15 80 16 93 14 85 16 66 16 79 18 77 19 91 a. Use SPSS and paste your output in this worksheet. b. Construct a scatterplot for these 10 values. Based on the scatterplot,

A random sample with n = 20 scores has df = 19. True False

It is known that 25% of 11-year-old children have no decayed, missing, or filled (DMF) teeth. In a sample of 10 children, find the probability that all 10 have DMF teeth It is known that 25% of 11-year-old children have no decayed, missing, or filled (DMF) teeth. In a sample of 10 children, find the probability that exactly 3 have no DMF teeth. I

You are employed as a statistician for a company that makes household products, which are sold by part-time salespersons who work during their spare time. The company has four salespersons employed in a small town. Let us denote these salespersons by A, B, C, and D. The sales records (in dollars) for the past 6 weeks for these four salespersons

1.) Res Ipsa Loquitur Is Latin For? A.) Buyer Beware B.) The Judge Is In Charge C.) The Jury Is In Charge D.) The Thing Has Been Decided

Find the P-value for the hypothesis test with the standardized test statistic z = 1.43, Right-tailed test, and level of significance = 0.05. Decide whether to reject H0 or fail to reject H0. A.0.0764; reject H0 B.0.1528; fail to reject H0 C.0.1528; reject H0 D.0.0764; Fail to reject H0

The red blood cell counts (in 10 5 cells per microliter) of a healthy adult measured on 6 days are as follows: 54, 50, 55, 53, 48, 52

One of the topics in week 3 is on probability. Prompt Discuss the benefits of probability techniques in your career. Computer Science-probable times for employees to be on the internet.

For the following data calculate the range, the inter-quartile range, and mean absolute deviation. 5 3 9 2 0 1 4

MSE provides an estimate for the standard deviation of the regression errors, . T/F?

A Type II error occurs when a treatment actually does have an effect on the scores but the effect was not large enough to reject the null hypothesis. True False

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5.01What proportion of a normal curve lies below a z score of - 2.1?

Need help with choosing which hypothesis test to use and finding H0 H1 df and critical value Males and females differ in whether or not they regularly eat breakfast the breakdown of students into faculty in psyc 204 is not uniform students invest more hours in sleep each night than they do in stats all week study hours depend on quiz scores
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Annual domestic sales and advertising of Lydia E. Pinkham Medicine Compa Exported from datamarket.com Date exported On DataMarket License Provider Source URL Units 2014-10-26 21:26 https://datamarket.com/data/set/22t7/annual-domestic-sales-and-advertising-of-lydia-e-pinkham-med Unknown; please assume a restricted license (all rights reserved);

Player Canine Gourmet Super Breath dog treats are sold in boxes labeled with a net weight of 15 ounces (425 grams) per box. Each box contains 10 individual 1.5-ounce packets. To reduce the chances of shorting the customer, product design specifications call for the packet-filling process average to be set at 43.5 grams so that the average net

Use the rules of logarithms to contract the following expression into a single logarithm (if necessary), then solve forx. Round the answer to three decimal places. ln(8)+ln(x)= 9.56

DATA ANALYSIS AND APPLICATION Data Analysis and Application < Your Name > Capella University 1 DATA ANALYSIS AND APPLICATION 2 [Introduction.] Use this file for all assignments that require the DAA Template. Although the statistical tests will change from week to week, the basic organization and structure of the DAA remains the same. According to

An instructional video on pitching claims that after undergoing the training on the video, players will be able to throw strikes on at least 60% of their pitches. TO test this claim, 20 little leaguers throw 50 pitches each before and after undergoing the training. THe table records the number of strikes out of 50 that each player threw. use a

Week 3 ANOVA Three Questions Remember to show how you got your results in the appropriate cells. For questions using functions, show the input range when asked. Group name: G1 G2 G3 G4 G5 G6 1 One interesting question is are the average compa-ratios equal across salary ranges of 10K each. Salary Intervals: 22-29 30-39 40-49 50-59 60-69 70-79 While

Homework help: Please answer all questions. A study used self-administered mail questionnaires to gather data on height and weight in order to calculate a measure of obesity. Which of the following types of problems were likely avoided by this method of data collection, and why? Interviewer bias Exposure misclassification Confounding Selection

1. Crop researchers plant 15 plots with a new variety of corn. The yields in bushels per acre are: 138.0 139.1 113.0 132.5 140.7 109.7 118.9 134.8 109.6 127.3 115.6 130.4 130.2 111.7 105.5 Assume thatbushels per acre. a) Find the 90% confidence interval for the mean yield for this variety of corn. b) Find the 95% confidence interval. c) Find the

If we have 95% confidence interval for the mean birth weight of infants born to mothers who smoke (6.3 lbs, 7.2 lbs), that means that the probability that the true mean birth weight for all infants born to mothers who smoke is between 6.3 pounds and 7.2 pounds.

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13. In a study designed to test the effectiveness of acupuncture for treating migraine, 100 patients were randomly selected and treated with acupuncture. After one-month treatment, the number of migraine attacks for the group had a mean of 2 and standard deviation of 1.5. Construct a 95% confidence interval estimate of the mean number of migraine

1)Please Discuss data analysis and the validity and reliability of data in the following proposed research study. Research Question Does reducing the barriers to pre-exposure prophylaxis increase the efficacy of the drug leading to a decrease in HIV rates? Data Analysis A survey and STD panel will be administered upon study consent to record

PUBH 6034 Module 3 Assignment: Air Quality Standards Worksheet_A Student Name: Use at least your Textbook and the EPA NAAQS Table/website https://www.epa.gov/criteria-air-pollutants/naaqs-table to answer the following questions. Your responses should show a solid graduate level summary supported with in-text citations and references listed in APA

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