Statistics Question

Q: is Bivariate normal distributions an assumption for the Pearson Correlation ?

A: If we suspect  linear relationship between two variables, then for  a given set of data, we can eval...

Q: The random variable x is the number of occurrences of an event over an interval of ten minutes. It c...

A: The random variable x defines the number of occurrences of an event over an interval of ten minutes.

Q: Describe about the Error Variability?

A: The element of variability is produced by factors, such as measurement imprecision, and is not attri...

Q: Statistics Question

A: (a) State the hypotheses. That is, the professional hockey players and professional baseball player...

Q: Here are some data compiled by a sports goods store.Indicates whether the following conclusions are ...

A: As it is known that mean is affected by the multiplication, division , addition and subtraction of o...

Q: A nurse is interested in the amount of time patients spend exercising per day. According to a recent...

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Q: answer the following question. test the hypothesis at 5% level of significance

A: The appropriate Null and Alternative Hypotheses are given below:   Null hypothesis:   H0: µ1=µ2.   T...

Q: Define the term relationship as a perfect positive cross-correlation?

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Q: The weights for newborn babies is approximately normally distributed with a mean of 5.8 pounds and a...

A: From the provided information, Mean (µ) = 5.8 pounds Standard deviation (σ) = 1.3 pounds Let X be a ...

Q: The average U.S. daily internet use at home is two hours and twenty minutes. A sample of 64 homes in...

A: Let X be the usage of internet in Soddy - Daisy Given:  Sample size (n) = 64 Sample mean = = 1 hr 50...

Q: Use the t-distribution table to find the critical value(s) for the indicated alternative hypotheses,...

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Q: The height of a building is: Discrete, Continuous, or neither Discrete nor Continuous?

A: Introduction: Discrete random variable: A variable that takes some distinct values and maintain some...

Q: Describe about the Level of Significance or p -Value?

A: Level of significance: The significance level is a value used as a criterion for deciding how small ...

Q: Explain how to find the Standard Error of Estimate.

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Q: About 6.9% of Americans suffer from diabetes. This exercise examines the percentage of people in sam...

A: In the probability and statistics theory, the normal distribution is used in theorem called Central ...

Q: A grocery store owner wants to know if rainfall is positively related to how much money his store ea...

A: Here the grocery store owner wants to know if rainfall is positively related to how much money his s...

Q: Suppose that from the past experience a professor knows that the test score of a student taking his ...

A: Concept of sampling distribution of sample mean: Let a particular characteristic of a population is ...

Q: Allied Corporation wants to increase the productivity of its line workers. Four different programs h...

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

Q: What is the formula for STANDARDIZED EFFECT SIZE, COHEN’S d (TWO INDEPENDENT SAMPLES)?

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Q: A special diet is intended to reduce the cholesterol of patients at risk of heart disease. If the di...

A: Null and alternate hypotheses: The investigator is interested to test whether the average cholestero...

Q: Use the t-distribution table to find the critical value(s) for the indicated alternative hypotheses,...

A: Given Information  two sample t test, the alternative hypothesis is shown  below: Ha: µ1≠ µ2 So, thi...

Q: On average, five birds hit the Washington Monument and are killed each week. Bill Garcy, an official...

A: Five birds hit the Washington Monument and are killed on average, each week. Funds will be allocated...

Q: What is the expression for PROPORTION OF EXPLAINED VARIANCE, η2 (ONE-FACTOR ANOVA)?

A: The proportion of explained variance is known as the coefficient of determination. It is the ratio o...

Q: You conduct a survey to find out whether one person talking on a cell phone during a romantic date b...

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

Q: QUESTION 3:   In a manufactory, there are two types of spoilages. It is found that 5% of spoilages a...

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will an...

Q: is it true that The assumption of linearity is met if the relationship is curvilinear ?

A: One draws a residual scatter plot and the y values. On the vertical y axis, the y values are taken, ...

Q: The mean height of an adult giraffe is 17 feet. Suppose that the distribution is normally distribute...

A: Hi! Thanks for posting the question. Since there are more than three sub-part questions, we will ans...

Q: The percent moisture content in a puffed cereal where samples are taken from two different “guns” sh...

A: From the provided information, The sample variances all both data set Gun I and Gun II can be obtain...

Q: The latest nationwide political poll indicates that for Amaricans who are randomly selected, the pro...

A: From the provided information, The probability that they are liberal is 0.30 that is probability of ...

Q: You want to buy a washing machine, and a salesperson tells you that the mean repair costs for Model ...

A: Introduction: Denote μ1, μ2 as the true mean repair costs for washing machines of Model A and Model ...

Q: Bill Borde, top advertising executive for Grapevine Concepts, has just launched a publicity campaign...

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

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed wit...

A: Consider X be a random variable which follows normal distribution indicates the distance of fly ball...

Q: Statistics Question

A: The appropriate Null and Alternative Hypotheses are given below:   Null hypothesis:   H0: µ1=µ2.   T...

Q: n= 40 x= 25 I need help with #2 & #3

A: Solution : Given that, n=40                    x= 25 Let x be a random variable  the number that wer...

Q: A rowing team consists of four rowers who weight 152, 156, 160, and 164 pounds. Find all possible ra...

A: The possible random samples of four rowers of size 2 without replacement is, Possible Sample Su...

Q: The result for a Pearson’s r between students’ anxiety and their achievement was, r(90) = - .75, p =...

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Q: Test scores of 30 students are given below.  55 70 80 85 90 100 55 75 80 85 90 100 60 75 85 85 90 10...

A: The given data set is: 55 70 80 85 90 100 55 75 80 85 90 100 60 75...

Q: 30% of the dogs in a town are pets. If a sampling distribution of sample size 20 is normally distrib...

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Q: an online poll asked: "do believe the Loch Ness monster exist?" among 21,520 responses 62% were yes....

A: Denote p as the true proportion of the respondents who said that they believed in the existence of L...

Q: What is the Sum of Squares Formulas for Population?

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Q: The manager of a Spiffy Lube auto lubrication shop is trying to revise his policy on ordering grease...

A: Let X be the number of grease cartridges used per week and it follows normal distribution  The avera...

Q: What is the key property of Standard Error of Estimate?

A: Introduction: The standard error is a measure of dispersion, based on the sampling distribution of a...

Q: What is formula for STANDARD DEVIATION FOR SAMPLE?

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Q: A real estate agency says that the mean home sales price in City A is the same as in City B. The mea...

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Q: If I'm trying to find the correlation between A and B using a statistical test, should I consider th...

A: Correlation:   Correlation gives the information about strength of the association and direction of ...

Q: In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation...

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Q: The following is data for the first and second Quiz scores for 8 students in a class. First Quiz ...

A: The best line that fits the data well is the least square regression line. For a data of the form (x...

Q: How to interpret scatterplots Positive, Negative, or little or No Relationship?

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Q: Use the linear congruential generator to obtain asequence of 10 random numbers, given that a 17, c 4...

A: From provided information, a=17, c=43, m=100, X0=31 Linear congruential generator is an algorithm us...