8. The table depicted below lists randomly selected students' self-reported hours of studying (x) and their corresponding final grades (y). a. Find the correlation coefficient r. b. Find the critical value. c. Is there a linear correlation (i.e., can Ho be rejected)? d. Find the regression equation. X 30 37 10 18 7 15 y 93 100 75 88 72 86

Q: A factory produces sacks of flour, a sample of 14 pieces with the following weights are taken: Find…

A:

Q: Provide the appropriate Ha or Ho to the following given situation and identify if it is ONE-TAILED…

A: The question is based on a formulation of null and alt. hypo

Q: You wish to test the following claim (Ha) at a significance level of α=0.01. For the context of this…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: If two random variables X, and X, are independent, then var (X,+X,) = var (X,)+ var (X,) var (X,-…

A:

Q: Express the confidence interval 37.8 % ± 3.8 % in the form of a trilinear inequality. % <p <

A: We have to express the confidence interval from given data..

Q: 1. Increasing medical costs have created a financial crisis among insuranc companies that provide…

A: Given that - Increasing medical costs have created a financial crisis among insurance companies that…

Q: The joint probability distribution function of a discrete random variable is fx.y) = cxy for x-1, 2,…

A:

Q: II. Use the following frequency distribution to answer item numbers 15 to 18. f f f 5.9 7.9 7.1 10.5…

A: Given information: X F 6.4 2 6.5 4 6.6 3 6.7 4 6.8 2 6.9 4 7 3 7.1 2 7.2 3…

Q: A game is played by drawing 4 cards from an ordinary deck and replacing each card after it is drawn.…

A:

Q: The commercial for the new Meat Man Barbecue claims that it takes 13 minutes for assembly. A…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: used data from the Social Security records to study the average monthly benefit for a specific year…

A: Given, Sample size retired, n1= 63 Sample size disabled, n2=60 Mean benefit retired, x1=$960.50 Mean…

Q: a. SE = 0.14 with 99% confidence. Assume that p, s0.7 and P2 20.6. b. A 90% confidence interval of…

A: Given: a) SE=0.14 Confidence level=99% p1=0.7p2=0.6 b) Width of confidence interval=0.76 Confidence…

Q: Suppose the value of Young's modulus (GPa) was determined for cast plates consisting of certain…

A: a)    x deviations 116.8 1.22 115.5 -0.08 114.5 -1.08 115.2 -0.38 115.9 0.32

Q: You are purchasing 16 bagels from the bagel store and only the type of bagel matters (so bagels of…

A: A permutation of a set is defined as an arrangement of its members into a sequence or if the set is…

Q: will be prepared using i= 0.5, the lowest clas 18. The true limits or the class boundaries of the…

A: 18 From the part 17, the lowest class interval is (6.4, 6.9).

Q: Question Let X be a random variable with probability d. 25 f(x) = {3 2 <x<1 0, elsewhere %3D Then…

A: Solution

Q: Assume that 26% of students at a university wear glasses. Suppose 300 students are randomly…

A: It is given that Sample size n = 300 Population proportion p = 0.26

Q: Statisticians at top national news networks are working behind the scenes in order to declare a…

A: Please note that if multiple questions are posted, as per our guidelines we can answer the first…

Q: What is the probability that the value is less than 90​? The probability that the value is less than…

A: Solution

Q: Q3 / If the student must answer 10 of the 13 questions, provided that he answers at least 4 of the…

A: A student is to answer 10 out of 13 questions in an examination such that he must choose at least 4…

Q: Assume a two-dimensional dataset that has only the following three instances (1, 2), (3, 4), (5, 6).…

A: The covariance of a single variable is σx2=∑i=1n(xi-x¯)2n-1. The covariance of two variables is…

Q: The mean systolic blood pressune of all healthy adults is less than than 121 mm Hg Sample data: For…

A:

Q: Use the mixed congruential method to generate a sequence of 32 random numbers with Xo=8, a=9, c=13,…

A:

Q: the United States? When a simple random sample of 400 families is taken in Washington, the mean…

A: Given Data : For Sample 1 x̄1 = 46211 s1 = 12214 n1 = 400 For Sample 2 x̄2 =…

Q: How many ways can 12 prizes be distributed equally to 4 students? Inee

A: Total Prize = 12 Number of student = 4 As there are 12 prizes that needs to be divided amongst 4…

Q: _9. The mean annual income of workers who are college graduates is greater than Php 100,000 a year.

A: here use basic of hypothesis testing

Q: Find the sample variances of the data sets A and B given below. A:3, 4, 6, 7, 10 B:-20, 5, 15, 24

A: Given that  Find the sample variances of the data sets A and B given below.   A: 3, 4, 6, 7, 10…

Q: Given a normal distribution with µ = 50 and σ = 4, if you select a sample of n = 100, there is a 45%…

A:

Q: Find the range of scores for a group of students given in the following table: Categories Repetition…

A:

Q: You wish to test the following claim (Ha at a significance level of α=0.01. For the context of this…

A: Given : Ho:μd=0    Ha:μd≠0

Q: The following is a list of hospitals in Pasig City. We are interested in estimating the average…

A: Solution: The list of hospitals are given and numbered from 1 to 20.

Q: A news article that you read stated that 53% of voters prefer the Democratic candidate. You think…

A:

Q: V Use the given data bélów tỏ answer item numbers 30 to 39. Class Interval 4. 50-54 45-49 3 11 5.…

A: 33) The class interval containing the D8 class is - 39.5 -44.5

Q: The joint distribution of the random variable X and Y is given in the following table: 2 3 4 Y 1 1 1…

A:

Q: c) If the psu population totals are highly correlated with the selection probability, then an…

A: Given problem Given that   If the psu population totals are highly correlated with the selection…

Q: i have the following regression equation  Log(total deaths per million) = -3.882  + 0.934Log(total…

A: For example: The slope coefficients is given as 2 this can be interpreted as if there will be one…

Q: a) Use your graphing calculator to construct and interpret a 95% confidence interval for the mean…

A: Calculate the Sample Mean and Sample Stannard deviation using Excel

Q: 12. A manufacturing plant uses a specific bulk product. The amount of product used in one day can be…

A: Given Beta=4 X=4

Q: Find the sample variances of the data sets A and B given below. A:3, 4, 6,7, 10 B:-20, 5, 15, 24

A: Introduction From the above the question we have to find out the sample variances of the given data…

Q: Suppose that workers can be divided into two groups: hard workers and slackers. Let y be the number…

A:

Q: Adidas X Parley sports shoes are also sold through the retailers.

A: The given data is supposedly collected using a Questionnaire made using Google forms. The…

Q: A researcher looks at the mean salaries of male and female electricians and decides based on the…

A:

Q: The mean and standard deviation of the blood sugar level of randomly selected 50 patients in a…

A:

Q: how many people should you sample? 4 80 125 382 383

A: Given : Margin of error: ME = 0.05

Q: Suppose that Y1, Y2, ... , Yn constitute a random sample from the distribution: fly|0) = { ( 1/O^2 )…

A:

Q: stationery store wants to estimate the mean retail value of greeting cards that it has in its…

A:

Q: Women are recommended to consume 1770 calories per day. You suspect that the average calorie intake…

A: For the given data Perform t test for one mean

Q: 6. Events that have no outcomes in comm 7. The general addition rule for two events (formula) 8. The…

A: 6. Events that have no outcomes in common - Mutually Exclusive or Disjoint Events.

Q: For The following data, the best fit line is: X 2 Y 12 6. 10 12 7. 3 r will be - 0.987 O r will be…

A:

Q: Construction workers work a mean of 7.93 hours each weekend, with a standard deviation of 0.8 hours.…

A: Percentile :  Percentile is the number such that certain percentage of data fall below that number.…