Imagine a researcher wants to determine whether parents differ from each other in their fondness for their children. The research asks each parent of 50 couples to each indicate how warm they feel toward one of their children. Would she use a single sample, dependent samples, or independent samples t test to analyze her data? Explain your answer.

Q: The placement test for a college has scores that are normally distributedwith μ= 400 and σ= 75. If…

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Q: Out of 300 students in the school, 225 passed an exam. What would be the mean of the sampling…

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Q: In a large data set, the 49th percentile is 523 and the 71st percentile is 675.  About what…

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Q: what is the appropriate statistical analysis to determine whether males and females differ?

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Q: In one​ city, 24​% of adults smoke. In groups of size 140 of​ adults, what is the variance of the…

A: Givenp=0.24n=140x~Binomial(n=140,p=0.24)P(X=x)=(nx)×px×(1-p)n-x      ; x=0,1,2...,n

Q: One sample has n = 6 and M = 10. A second sample has n = 4 scores with M = 15. If the two samples…

A: Combined mean = n1x1¯+n2x2¯n1+n2

Q: What  statistical test( from the data)  should be used to check whether people choose each type of…

A: Chi-square goodness of fit test: The Chi-square goodness of fit test is used to test whether or not…

Q: Could two samples have the same range but different means? Explain.

A: Yes, Two samples have the same range but different means.

Q: A sample selected from a population gave a sample proportion equal to 0.60.

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Q: Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the…

A: From the given information, The sample size is 100 viewers. Among 100 viewers, 36% indicated that…

Q: You take a random sample of size 25 students and find the 5 who understand this lecture. With 99%…

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Q: A researcher is studying changes in the student body at her university and has selected a random…

A: (a) (b) (c)

Q: A manufacturer of golf equipment wishes to estimate the number of left-handed golfers. How large a…

A: Given,          Sample proportion  P∧=0.09          Margin of Error∈=0.04          and…

Q: Explain the Formulas for a sample comparable to the ones for a population?

A: If the data includes all the possible values, then it is called population. Whereas, the sample data…

Q: Based on the sample, predict the number of adults in Palm City whose main source of news is…

A: In sample, number of adults whose main source of news is newspaper, X = 54 Sample size n =…

Q: Are these samples independent or paired?

A: When the two observations are taken on same individual then the samples are said to be paired.

Q: In this investigation, you learn how to decide if a value of x2 is statistically significant. How…

A: Here we have been provided with two samples falling into various categories. We will use Chi-Square…

Q: Suppose the scatter diagram of a random sample of data pairs (?, ?) shows no linear relationship…

A: The coordinates (?, ?) be (x, y)

Q: An opaque jar contains 300 marbles, all either green or purple. Calista pulls out 10 marbles without…

A: # Given: no of marble in jar N=300  Sample of size n=10 drawn  No of purple marble in sample =2…

Q: Suppose that in a large class at a major university, the instructor announces that the average grade…

A: Given information- We have given the average grade on an exam = 72 Since we know that from the…

Q: estimate the sample size

A: An estimate of sample size: The appropriate sample size for estimating the mean of a variable from…

Q: Suppose multiple samples of size nn are drawn from a population with a mean of 50. The mean is…

A: Population mean =50

Q: According to the Law of Large Numbers what effect will increasing the sample size have on the sample…

A: It is given that the sample size increases.

Q: State one possible advantage of using paired samples instead of independent samples.

A: Provide the possible advantage of using paired samples instead of using independent…

Q: To study the mean blood pressure of all people in her state, Christine samples the population by…

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Q: Explain how you will ensure that data samples are of adequate size and are population when you…

A: It is asked to explain how you will ensure that data samples are of adequate size and are…

Q: group of children are surveyed about their favorite snacks . The results of the survey are shown…

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Q: How to decide one or Two Samples?

A: t-test:  (i) In the t-test, the sample size of 30 is large enough (n < 30) (ii) Samples are taken…

Q: What will happen to the sample size if the percentage error becomes lower? Can you explain to me how…

A: From the given information we want to find solution.

Q: Blank are more representative of a population, but blank are easier to obtain

A: The sample is a set of units that is obtained from a population, which represents the population.…

Q: In a paired samples t test, explain the logic of difference scores (why do you need to find them to…

A: PAIRED T-TEST: The paired t test is also defined as dependent- t test.  This test is used to test…

Q: In spss, what test can you do to compare the score of variables?

A: As per the question we have to compare the score of variables if we have 2 independent samples, we…

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: The value of p0 is 0.52 and the sample size n is 800.

Q: Pick a sample problem where despite correlation, causation cannot be reasonable argument.

A: Let us take an example of sales of umbrella and sales of raincoats. Sale of raincoats Sale of…

Q: (a) Among the next 210 customers, what are the mean and variance of the number who pay with a debit…

A: Consider the events A, B and C that represents the customers who pay with a credit card, debit card,…

Q: In a paired samples t test, explain the logic of difference scores (why do you need to find them to…

A: Paired t test:The paired t test is also defined as dependent- t test. It is used to test the mean…

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

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Q: Your Statistics instructor wants to determine whether students who have previously taken an online…

A: The response variable is also known as the dependent variable.

Q: A population with a mean of 8 has a sum of 40. How many scores are in the population?

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Q: A telecommunications company knows that 90% of their customers own smart phones. Ten customers are…

A: Let "X" be the customers who own smartphones. The variance of the binomial distribution is given by

Q: If a person’s z score equals 1.61, what percentage of the observations are more extreme?

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Q: The fuel efficiency, in miles per gallon, of 10 small utility trucks was measured. The results are…

A: Given the values 22, 25, 23, 27, 15, 24, 24, 32, 23, 22, 25, 22. We need to find the variance of…

Q: If a survey of a movie shows that 50% of all people who like the movie, enjoyed the official movie…

A: Introduction: Population of interest: The population of interest includes all the individuals of…

Q: We would like to know if Intel’s stock and Southwest Airlines’ stock have similar rates of return.…

A: Given :  We would like to know if Intel’s stock and Southwest Airlines’ stock have similar rates of…

Q: Compose the score values for 3 samples that have the same mean and median, but differ in the amount…

A: Part 1   2, 4, 6 3, 4, 5 4, 4, 4     Explanation: Part 1   There are many different conceivable…

Q: A random sample of 40 students from each grade level was surveyed regarding their preference for a…

A: I have given an answer in step 2.

Q: Imagine a study comparing two groups:  undergrad vs. graduate students in terms of stress level. You…

A: It is provided that we have two independent groups and we have to compare them  in terms of stress…