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Mathematics Questions and Answers August 07, 2022

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How do you rewrite the following expression in terms of the given function. cotx/-1+cscx- cscx/cotx;tan x

3.3 Why the Standard Algorithms for Addition and Subtraction in Base Ten Work CA-67 SECTION 3.3 CLASS ACTIVITY 3-J X Understanding the Standard Addition Algorithm CCSS CCSS SMP3, SMP5, 2.NBT.7, 2.NBT.9 Materials Bundled toothpicks or base-ten blocks would be useful for this activity. 1. Add the numbers, using the standard paper-and-pencil method.
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In a digital communication system, the received signal is sampled at a fixed bit rate and sent to a decision device. The noiseless sampled signal X is either +5 or -5 volts which corresponds to data "1" or "0" respectively. However, in the presence of additive noise, the sampled received signal Y consists of 2 components, Y = X +N, where the noise

From a study of children between the ages of 10 and 14 living in Gaza during the Al-Aqsa Intifada in 2006.In order to be included in the study, a child must have experienced at least one traumatic event during the Intifada (such as shelling of home, being shot, losing family, witnessing killings).A variety of standardized tests were administered
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Hi I would like to check the answers and formulas for the following. I need help with 4 calculation formula to check steps 3. You decide to further your research project by hypothesizing that the true average core body temperature amidst higher ambient temperature and humidity levels for the population who do not use electric fans is different

Recall the joint distribution of bananas and apples given in HW#7. Suppose that the bananas all weigh 120 g and the apples all weigh 85 g. Then we can define W=120 X +85Y to represent the total weight of bananas and apples purchased by the customer. Note that ?X=3.05 , ?Y=1.5 , ? X 2 =2.8475 , ?Y 2=0.91 , and Cov( X ,Y )=?1.825 . a) (2) Determine
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A sample of sixteen is taken from a normal distribution, with the following ages: 7, 9, 12, 12, 18, 22, 35, 36, 42, 43, 44, 47, 55, 55, 60, 63 Use a t-distribution, to calculatea 99% confidence interval for the mean of the population. Your answer be in an interval with two decimals. [2_ . _ _ ,4_. _ _ ]. If you were to Calculate the 95 %

Use the slope-intercept form to graph the equation. y = 5/6x - 5

HW Score: 0%, 0 of 7
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Imagine that the Sample size was cut in half to 3,200, but the survey found the same value of 17.0% for the percentage of victims. a)Would the 95% confidence interval increase or decrease?By how much? b)Would the 99% confidence interval increase or decrease?By how much?

In the histogram (attached), explain why the average number is so variable over the interval. Guess what the smoother blue curve (lines and filled circles) represents. \f
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We will need to use identities to simplify and solve some trigonometric equations. is this true or false?

The average number of onions needed to make French onion soup from a population of recipes is unknown. A random sample of recipes yields a sample mean ofx=8.2 onions. Assume the sampling distribution of the mean has a standard deviation of x =2.3 onions. Use the Empirical Rule to construct a95% confidence intervalfor the true population mean

To set a schedule for a new bus route the transit authority repeatedly times the trip between two points; the time x in minutes is found to have the probability distribution shown. X202122232425 P(x).07.19.36.24.10.04 The probability that a randomly selected trip will take at least 24 minutes is about:

How do you find the % between-z and z? For example, how do I find thez-scores for which 25% of thedistribution's area lies between z and z

Suppose that you are thinking about buying a car and have narrowed down your choices to two options. The new-car option: The new car costs $25 comma 000 and can be financed with a four-year loan at 7.13%. The used-car option: A three-year old model of the same car costs $14 comma 000 and can be financed with a four-year loan at 7.52%. What is the

Find the points on the cardioid r = 1 cos at which there is a horizontal tangent line, a vertical tangent line, or a singular point.

The weight U of a man is normally distributed with mean 160 lb deviation 30lb The weight V of a woman is normally distributed with a with mean 120 lb and standard deviation 25 lb in and women are randomly selected. Let W equal U - V. what is the distribution of w? what are the mean and variance of w? what is the probability that the man is at

Identify the symbols used for each of the following: (a) sample standard deviation; (b) population standard deviation; (c) sample variance; (d) population variance. If sample data consist of weights measured in grams, what units are used for these statistics and parameters? Question content area bottom Part 1 a. The symbol for sample standard

Choose one of the scenarios (A or B) listed below and address ALL of these questions (20pts): Study design What is the rationale for the study? Purpose statement What is the research hypothesis (vs. null hypothesis)? TWO dependent variables ONE independent variable THREE groups What are the limitations/delimitations? What type of study are you

12 people are available to fill three positions in a company: sales manager, finance manager, and personnel manager. All twelve are equally competent in each area, how many different ways can the positions be filled?

At the 0.05 level of significance, a p-value of 0.035 would lead you to reject the null hypothesis

Bus and subway ridership in Washington, D.C., dur- ing the summer months is believed to be heavily tied to the number of tourists visiting the city. During the past 12 years, the following data have been obtained: \f
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Show steps on how to Perform Multiple Regression Analysis by treating Selling Price as the dependent variable and all the other variables as independent variables. \f
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9. Fully analyze the function f (x) = -2 1 x2-9' Determine all key features of f(x). (Asymptotes, Intercepts, Discontinuities) [1K, 11,3A, 1C] Find f '(x), and determine any critical values. [1K, 11, 1C] Find f "(x), and determine any critical values. [2K, 11, 1C] 10. Sketch a graph of f(x), including all key points. (Don't forget labels and
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Please help, I cannot solve this question. Thank you! In the last presidential election, before the candidates started their major campaigns, the proportions of registered voters who favored the various candidates were recorded as Republicans 34%, Democrats 43%, and Independents 23%. After the major campaign began, a random sample of 300 voters

A study was conducted on the effect of daytime running lights on cars. Researchers gathered data from a random sample of 3,248 drivers and measured quite a few variables, in addition to the explanatory variable of daytime running lights and the response variable of less accidents. According to a newspaper article summarizing the study, those cars

a) what is the point estimate for the mean difference? (to 3 decimal places) b)what is the standard error of the sample mean difference? )(to 3 decimals) c)what is margin of error for 95% confidence interval for the mean difference? (3 decimals)

There is no prior information about the proportion of Americans who support gun control in 2019. If we want to estimate 93% confidence interval for the true proportion of Americans who support gun control in 2019with a 0.18margin of error, how many randomly selected Americans must be surveyed?

Check all values that cannot be a probability: (check all that apply) Selection was . Selection was . Selection was . Selection was . Selection was . Selection was . check_box_outline_blank 0 check_box 110\% check_box -0.26 check_box_outline_blank 1 check_box \dfrac17 check_box 0.\bar8

1} In this lab, you will need to enter many statistical formula to derive answers from Excel. 2) For all graphs and charts, please label the axis and ensure proper titles are used. 3) For all tables, please ensure the correct variable namey(s) is/are used. 4) Each student MUST upload and submit only ONE lab assignment. This lab assignment will
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Rancher John wants to enclose a rectangular area beside a river. There are 320 yards of fencing available. What is the largest total area that can be enclosed?

A survey is made of sources of news for people in a metropolitan area. It is of interest whether people obtain their news from television (event T), a newspaper (event N), or radio (event R). express the following events in terms of N,R, or T in set theoretic notation. news is obtained from television but not newspapers. news is not obtained from

subject: Math solve the following questions ( handwritten / type solution only neatly and clean box final answer) thankyou! The PORTA-VAC Company is planning to develop a new cordless vacuum cleaner. They have the following activities: A. Develop product design B. Plan market research C. Prepare routing(manufacturing engineering) D. Build
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I need help with this problem that has me stuck. Never been a fan of word problems. Need to explain what the question is really asking, what pieces of information are relevant, and how to fill in the missing information. Will need to interpret the word problem to identify any missing information; translate the word problem into an equation;

3. The following is the average daily maximum temperature and average daily minimum temperature for Los Angeles. Make a double line graph. - two lines Month Max Temp (F) Min Temp (F) Jan 68 Feb 49 70 March 50 70 52 April 73 54 May 75 58 June 80 61 July 84 65 Aug 85 66 Sept 83 65 Oct 79 60 Nov 73 53 Dec 69 49 month 4. The following is the
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subject: statistics solve the following questions ( handwritten solution only neatly and clean box final answer) thank you! Solve the following problems. Show your complete solution. No solution means wrong. I. A recent study of 200 nurses found that of 125 female nurses, 56 had bachelor's degrees; and of 75 male nurses, 34 had bachelor's degrees.
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A company decides to offer a monetary incentive for employees who log a specified number of hours spent exercising in an attempt to improve employee health. The average health score (higher = better) of the 45 employees who logged enough hours was 89. The mean health score for all employees was 85, with a standard deviation of 6.1. 12) Is this a

Have you ever wondered about the likelihood of an event occurring? Whether it's the odds of your favorite football team winning on Sunday or how much you pay for car insurance, probability concepts can play a role in making those determinations. Respond to the following questions Consider a situation that you might need to use your understanding

I don't understand what he want me to do? In your initial post, describe the extent to which your chosen final project research article employs graphical representations of the data. For example, what types of graphs are included? If graphs are not included, identify places in which a graph would be helpful to support the communication of ideas.

Program R function that inputs a data frame and outputs a list with the following components: The number of observations in the data frame. The number of variables in the data frame. A vector of the variable names in the data frame. A list object named "column_data," where each list item appears in alphabetical order and is a list object with the

How do I identify the sample space after drawing a tree diagram in determining the number of outcomes?

What is the definition of instantaneous angular acceleration? Multiple choice question. The rate of change of the angular displacement The rate of change of the linear velocity The rate of change of the angular velocity

Use the six data items listed below to solve problem 2-5 3, 6, 2, 1, 7, 3 2. Find the mean. 3. Find the median. 4. Find the midrange. 5. Find the standard deviation

[15 total pl:(s)] A two-way analysis of variance model with interaction was fit. Factor A had 3 levels, Factor B had 3 levels, and there were 3 replicates for each combination of Factors A and B. The sum of squares for interaction (SSAB) was 20 and the sum of squares for error (SSE) was 72. (a) In the population, what is the model that you are
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If a page is ripped from a 6-page book, it is page 6; then another page is ripped and it is page 2. What is the probability that both of these events occur?

Help solve all parts The data from a simple random sample with 25 observations was used to construct the plots given below. The normal probability plot that was constructed has a correlation coefficient of 0.948. Judge whether a t-interval could be constructed using the data in the sample. Click here to view the normal probability_plot and the
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Hello, GOOD FOLKS! 1)Please interpret both PRE-LEAN AND POST-LEAN CHARTS.Please compare and contrast these probability plots. 2)Does the PRE-LEAN PROBABILITY PLOT SHOW NORMALITY?DOES IT HAVE A NORMAL DISTRIBUTION?PLEASE EXPLAIN 3)Does the POST-LEAN PROBABILITY PLOT SHOW NORMALITY?DOES IT HAVE A NORMAL DISTRIBUTION?PLEASE EXPLAIN 4)WHICH
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Please answer the following questions. Z table not provided can be looked up. Let the random variable Z have a standard normal distribution. Use the Z-table to find each of the following. Give your answer in decimal form, precise to at least three decimal places. (a) P(Z -1.34) = (c) P(0.13
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28. If a researcher would like to determine the effect of height on weight, then height is called a (an) ........ variable. (A) dependent (B) outcome (C) confounding (D) independent
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3) A positive NPV means that the investment will provide added value because the projected return exceeds the A) modied internal rate of return B) discount rate C) accounting rate of return Di adiusted present value
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A study was done to look at the relationship between number of movies people watch at the theater each year and the number of books that they read each year. The results of the survey are shown below. Movies 4 0 6 0 2 5 10 2 10 10 3 Books 10 8 10 13 10 10 6 10 7 3 12 a. Find the correlation coefficient:r= Round to 2 decimal places. b. The null and

if we use the research question what is the relationship between the employees engagement and there happiness describe how the research question could be addressed with multiple regression with two predictor variables. Describe the predictor variables ( X 1 , X 2 ), the outcome variable ( Y ), and the associated measurement scales. Articulate the

2) Suppose temperatures and monthly ice cream sales were measured for 100 randomly sel: cities. Which variable is the explanatory variable and which one is the response? A) Temperature is the explanatory variable and ice cream sales is the response because temperature could explain the amount of ice cream sales. B) Temperature is the explanatory
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A game has an expected value to you of $400. It costs $400 to play, but if you win you receive $100,000 (including your $400 bet), for a net gain of $99,600. What is the probability of winning? Type adecimal.

May you please help me understand ? Suppose that 80% of all STA2023 students pass the first test in the course.If a random sample of 60 students from STA2023 is taken, what is the probability that 75% or fewer passed the first STA2023 test?Write the probability statement and sketch the curve. What do I need to do in order to solve this ? Thank you.

For random samples of size 16 from a population with mean, = 48, the mean of the sampling distribution of x is _____

1. The two types of coping with stress: a. ___________________________ b. ___________________________ 2. Three stages of the General Adaptation Syndrome a. ___________________________ b. __________________________ c. ___________________________ 3. Three major parts of the HPA axis a. ___________________________ b. ___________________________ c.

An observational study of teams fishing for the red spiny lobster in a certain body of water was conducted and the results published in a science magazine. One of the variables of interest was the average distance separating trapscalled "trap spacing"deployed by the same team of fishermen. Trap spacing measurements(in meters) for a sample of seven

Solve the problem. A stretch of railroad is 234 m long and rises 140 m in elevation. What is the angle of incline to the nearest tenth of a degree? Select one: a. 32.30 b. 39.10 c. 30.90 d, 36.70
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Let x be a discrete random variable with the following probability mass function: pr(X=x)={1/20(x+1),x=1,2,3,4,5 0,elsewhere Compute; 1.E[3x 4 -2x 3 +9] 2.var(x) 3.Determine the cumulative distribution of function x.

Officials in a small town are preparing the annual budget for their community. As one component of this preparation, they want to estimate the proportion of their constituents that file fraudulent tax returns. Due to cost and time constraints they decide to only sample a representative subset of taxpayers and scrutinize their tax returns. 1 The

A data set includes 108 108 body temperatures of healthy adult humans having a mean of 98.3 98.3degrees F and a standard deviation of 0.69 0.69degrees F. Construct a 99 99% confidence interval estimate of the mean body temperature of all healthy humans. What does the sample suggest about the use of 98.6degrees F as the mean bodytemperature?

Suppose you own shares of a company's stock. Over the past ten trading days, its mean selling price has been $14.89. For the history of the company, the average price of the stock has been $10.43 (with sx= $5.60).You wonder if the mean selling price for the next 10 days can be expected to get much higher.Should you wait to see, or should you sell

Zesty Pizza claims that their mean delivery time is 30 minutes. Because you had to wait so long for your pizza, you decide to test whether the average delivery time is longer than 30 minutes. A random sample of 15 deliveries had a mean delivery time of x = 33.5 minutes. You should declare statistical significance only if there is a small

Extra credit opportunity [1.0%] Use data for historical Atlantic Basin Storm Count Atlantic Basin storm.xlsxDownload Atlantic Basin storm.xlsx Average it per decade Plot it (i.e. make a graph) Write a few sentences comparing the records and whether the numbers are increasing with time You have until June 7 at 11:59 pm (Friday) on Week 10

Replace the 18 in the data set by 188 and again use the defining formula to compute the sample standard deviation

Question below: Summary statistics for the concentration time Summary StatiStics for TimeConc: "TimeConc" are given for both genders. Group by: Gender Gender n Mean Std. dev. MedianQ1Q3IQR . , Female 53440.30321913592434 37.5 32 45 13 variable Tlmeconc between males and Male a) Compare the measures of center for the 58043.61896627.441028 39 33 43
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The following graph shows typical height for a girl at each age from 2 to 20 years. At what age do girls generally stop their rapid height growth? 14 6 10 20

One of the main purposes of this video (because it's taught in Spanish 2 in the textbook) was for you to notice how the date is formed in Spanish. Which is correct? (You can go back and listen if needed.) El Da de las Madres es de diez el mayo. El Da de las Madres es el mayo de diez. El Da de las Madres es el diez de mayo. El Da de las Madres es

Use the dot method to add the numbers below. If the number needs a dot, put a dot (period) to the right of the number. Otherwise leave it blank. Show all work using the correct method on your handwritten work/answer sheet. 4 9 1 1 7 4 5 2 9 + ________

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Are the factors that contribute to a person's wellbeing, ( ie: Friendship and social life, job or primary activity, and health and physical condition), Independent of a person's marital status. See the chart. Marital status single married Widowed/divorced totals Factors contribution to a person's wellbeing. Friendship and social life 41 49 42 132

This is an example of: Group of answer choices Geometric shapes Contour lines Figure-ground reversal Stippling

Aretha wanted to gather data about the cost of local bowling leagues in her area. She plotted the data and determined that the consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. Identify and interpret the y-intercept in this model. The y-intercept is 20. This is the cost per month. The y-intercept is 20.

Researchers built a model to explore the relationship between a possum's total body length (in cm) and their skull width (in mm). They collected data from 104 possums in Australia and New Guinea. Why should we suspect that the possum with a body length of 84 cm and a skull width of 68.6 cm is an outlier? Select all correct answers; there may be

Who pays the transportation charges buyer or seller if the terms are as follows; expand on reasons for your decision: FOB Factory, FOB consolidator, FOB store, FOB destination, FOB Factory prepaid.

please answer neatly and throughly (1 point) The function f(x) = 8x2 (1-9x)2 is represented as a power series f (x) = n=0 Find the first few coefficients in the power series. C2 C3 = C4 = C5 Find the radius of convergence R of the series. R =
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The accompanying table shows the maximum weights (in kilograms) for which one repetition of a half squat can be performed and the jump heights (in centimeters) for 12 international soccer players. Complete parts (a) through (d) below. Maximum weight, x Jump Height, y 190 61 180 58 150 55 175 60 180 55 175 64 155 53 155 52 160 50 180 58 195 59 210

PLEASE SHOW THE WORKING. THANK YOU !! Exercise 4-55 Algo Christine has always been weak in mathematics. Based on her performance prior to the final exam in Calculus, there is a 48% chance that she will fail the course if she does not have a tutor. With a tutor, her probability of failing decreases to 18%. There is only a 58% chance that she will
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A population of values has a normal distribution with = 144 =144 and = 34 =34 . You intend to draw a random sample of sizen = 18 n=18 . Find the probability that a single randomly selected value is less than 154.4. P ( X < 154.4) = Find the probability that a sample of sizen = 18 n=18 is randomly selected with a mean less than 154.4.

Audiences process ______ percent of all information we receive through our sense of sight. Group of answer choices 25 50 less than 50 more than 80

statistics quetions Q.1 Find the quartile deviation, co-efficient of quartile deviation, mean-deviation of mean and median also find co-efficient of mean-deviation for mean and median. Groups 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 18-20 Frequency| 18 24 47 80 102 66 40 21 15 Hence draw a cumulative frequency graph and use this to find the median
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To calculate the conversion factor needed to adjust the recipe for Chicken Liver Pate from 12 portions to 50 portions, we will use the following formula: \text{Conversion Factor} = \frac{\text{Desired Portions}}{\text{Current Portions}}Conversion Factor= Current Portions Desired Portions Given: Current recipe yields: 12 portions Desired portions:

can you explain to me the question by steps There are 43 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a random variable with an expected value of 5 min and a standard deviation of 4 min. (Round your answers to four
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Cake flour tends to have a slightly lower percentage of gluten than many other wheat based flours and of dog or often come making of cakes, with some experts recommending less than an average will provide the lowest amount of gluten in its cake flour . He finds 4 different providers that he wishes to compare ("Finest Flour", "Cromulent Cakes",
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QUESTION 6. (20 points). If the discrete random variable = has a Poisson distribution with 3 parameters, what is the Variance of the random variable = ( + 1) exp ()? ( () ^ ).

I need help solving the following problem: Use the Comparison Test to determine whether the series converges or diverges: \f
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2. Population Means - Independent Samples Nightingale shoes is interested to know who is spending more on their brand: women or men. They surveyed the first 300 people who entered their store. They found that 96 men on average spent $69 with a standard deviation of $14. On the other hand, 204 women spent $73 with a standard deviation of $34. Test
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20. A manufacturing company uses sheet metal and a press to cut out washers. The sheet metal is 16 inch thick. The washers have outer diameter 1 inch and inner diameter - inch. The sheet has length 8 yards and width 3 yards,. a) Determine how many washers can be cut from one sheet. b) Calculate the volume of material not used. Include the material

Use point-by-point plotting to sketch the graph of the function. f(x)=-5-x 3 \f
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Use the sample data and confidence level given below to complete parts?(a) through?(d). Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n = 1033 and x = 541 who said "yes." Use a 99% confidence level. Click
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1. [12 marks] Single-period multi-state model. Consider a single-period market model M = (B. S) on a finite sample space ? = (w1, waug}. We assume that the money market account B equals Bo = 1 and B1 = 4 and the stock price S = (So, S,) satisfies So = 2.5 and S1 = (18, 10, 2). The real-world probability Pis such that P(cy) = p; > 0 for i = 1, 2,3.
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A 97 percent confidence interval will be more precise than a 93 percent confidence interval, all other things remaining the same. True or False?

It has been reported that 48% of people text and drive. A random sample of 60 drivers is drawn. Find the propabability that the proportion of people in the sample who text and drive is less than 0.499. write only a number as you answer. Round 4 decimal places.

38) A good regression model has the fewest number of explanatory variables providing an adequate interpretation of the dependent variable. A. TRUE B. FALSE
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In a z-score formula, as it is used in a hypothesis test, explain what is measured by M- in the numerator? Explain what is measured by the standard error in the denominator.

6) A computer network manager wants to test the reliability of some new and expensive fiber- optic Ethernet cables that the computer department just received. The computer department received 1 boxes containing 10 cables each. The manager does not have the time to test every cable in each box. The manager will choose one box at random and test 2
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12) What key things should you look for when examining the potential linear association betw variables? A) A noticeable positive or negative trend on the scatterplot. B) A noticeable overall linear shape on the scatterplot. C) The vertical spread of the points on the scatterplot which indicate the strength of an association. D) All of these
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Q2. Let X 1, X 2 be a random sample from exponential distribution (sample of n observation) f(x 1 ; 1 ) = (1/ 1 ) e -(x 1 / 1) ,x 1 >0. f(x 2 ; 2 ) = (1/ 2 ) e -(x2/ 2) ,x 2 >0. Test the hypothesis for H 0 : 1 = 2 (=) vs H 1 : 1 2 . (a). Show that the test statistic can be expressed as a function of . (b). Show that distribution of T does not

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