A population of N = 5 has a mean of u = 22. One score is removed from the population The new mean is now H = 25. What is the value of the score that was removed?

Q: The mean of 5 observations is 4.4 and the variance is 8.24. If three of the five observations are…

A: Given: Number of observations (n) = 5 Mean x¯=4.4 Variance (s2) = 8.24 The three observations are 1,…

Q: A sample of n = 9 scores has a mean of M = 20. One of the scores is changed and the new mean is…

A: The formula of the mean : Mean= sum of observationsnumber of observationssum of observations = meanM…

Q: A sample has a mean of 30 and s=8 would a score of x=36 be considered a central score or an extreme…

A: The z-score for x=36 when mean of 30 and standard deviation of 8 is, z=x-Means=36-308=68=0.75 It is…

Q: A social worker is interested in examining how people who have higher levels of psychological…

A: Given:   X1 X2   12 7   10 4   11 6   7 4   9 6   7 2   5 1   8 5 Mean=M 8.63…

Q: In a one-tail test, the p-value is found to be equal to 0.0026. If the test had been two-tailed, the…

A:

Q: if we take someone’s temperature through the ear, it will be usually a bit higher than his or her…

A: From the provided information, Mean (µ) = 98.7oF Standard deviation (σ) = 0.7oF Let X be a random…

Q: A sample of n=5 scores has a mean of x=9. what is Ex for this sample?

A: Mean = 9 n = 5

Q: A population with a mean of µ= 8 has EX=40. How many scores are in the population

A:

Q: A student scored 70 on a physics exam where the class mean is 80 and a SD of 9. He scored 60 on a…

A:

Q: Mean of 100 items is found to be 30. If at the time of calculation two items are wrongly taken as 32…

A:

Q: The results above were obtained because the sample means are close together. To construct the data…

A: The data shows the three treatments with each 4 data values.

Q: A sample of n=8 scores has a mean of M=7. If one score is changed from X =20 to X =4, what is the…

A: Consider the first 7 scores is x1, x2, x3, x4, x5, x6, x7 and the 8th score is, x8=20. The formula…

Q: 29. Based on what you found in #26, what is the proportion of variability in X that can be explained…

A: The coefficient of determination which is sometimes called R squared is the measure of variability…

Q: that the mean score of these 53 students is 147.9. Is this significantly different from the national…

A: Given: Sample size, n = 53 Mean,  Population mean,  standard deviation,

Q: A score that is 3 points lower than the sample mean has a z-score of z = -0.25, and a score of X =…

A: Given information: Case-1: z = -0.25  Score (X) = u-3  Sample mean (u) = u  Case-2: z = -0.75  X =…

Q: The mean of a data set is 12.5 cm, and the variance is 4.0 cm. What is the z-score of 9.5?

A: Mean = 12.5 Variance = 4.0  Raw score = 9.5

Q: Suppose the correlation, r, between two variables x and y is -0.44. What would you predict about a y…

A: The correlation, r between two variables x and y is provided as – 0.44. Since, the regression line…

Q: A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey,…

A: A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey,…

Q: The student government took a poll on a policy they would like to suggest to the dean. The…

A: Given that,

Q: The results above were obtained because the sample means are close together. To construct the data…

A: Data of three treatments is given as:   Treatment A Treatment B Treatment C 10 13 17…

Q: A company that produces cranberries knows that about 7% of its cranberries are bruised in the baggin…

A: alpha = 0.01 p-value = 0.004   Decision Rule: If p-value ≤ α, then reject the null hypothesis.

Q: Samuel Morse determined that the percentage of a's in the English language in the 1800s was 8%. A…

A: Denote p as the true proportion of a’s in modern newspaper. It is reported that proportion of a’s in…

Q: Suppose that Max is a climate change scientist and butterfly enthusiast. In Max's locale, the mean…

A: The distribution is normal and the population standard deviation is unknown so the t distribution…

Q: A researcher would like to know if IQ scores are related to age. Using 10 high school students, he…

A: We have given that  A random sample of size 10 of high school students. Computed r is 0.58 and level…

Q: What does RR of 0.35 tells you

A: In general: If the risk ratio is 1 (or close to 1), it suggests no difference or little difference…

Q: A sample of 9 freshmen takes a reading comprehension test and their scores are a mean of 10 and…

A: Consider that μ defines the population mean score.

Q: A population of N= 10 scores has a mean ofµ=6. After one score is removed, the mean is found to be…

A:

Q: A sample of  n= 5  scores has a mean of 12 . If one new score with a value of  x=18 is added to the…

A: Given information- Sample size, n = 5 Sample mean = 12 Since we know that-

Q: A social worker is interested in examining how people who have higher levels of psychological…

A: Solution The sample contains the paired data and the dependent sample.

Q: In a class exam, student A obtained a score, 70, He found that 65 % of the class students had scores…

A: Given that student A obtained a score 70  65 % of the class students had scores of 70 or lower.

Q: A sample of 30 distance scores measured in yards has a mean of 7, a variance of 16, and a standard…

A: Given statistics:Consider the variable x represents the distance scores in yards.The given…

Q: The athletic director at a large university compared the proportions of freshmen (1st year students)…

A: The hypothesis is, Null hypothesis: H0: There is no difference between proportions of freshmen and…

Q: Rick took a test that is known to produce normally distributed grades with a mean of 72 and a SD of…

A:

Q: NCAE shows that the average score of the students is 80 and sd is 15. What is the percentile rank of…

A: Given :     Mean (μ)=80Standard deviation (σ) = 15x=84

Q: A sample of n observations has a sample mean of �̅x= 100 and variance of σ2 =100. If a new…

A:

Q: Suppose the correlation between height and weight for adults is +0.80. What proportion (or percent)…

A: From the given information,The correlation between weight and height for adults is 0.80

Q: A population of N=5 scores has a mean of μ=8. After one score is removed, the mean is found to be…

A: We have to find given missing score.

Q: Suppose you are conducting a paired t test to determine whether or not caffeine has an effect on…

A: d = B- A

Q: The American Heart Association is about to conduct an anti-smoking campaign and wants to know the…

A:

Q: In general,_____% of the values in a data set lie at or below the 94th percential. _______% of the…

A:

Q: A sample of n = 5 scores has a mean of M = 12. If one person with a score of X = 8 is added to the…

A: Given n = 5 mean = 12

Q: After three exams Denny has a mean score of 74 with only one exam remaining in the class what is the…

A: It is given that after three exams, Denny has a mean score of 74. To find: minimum score Denny has…

Q: In a sample ofn = 6 scores, five of the scores are och above the mean by one point. Where is the…

A: Consider that the mean is x and the sixth observation is y.

Q: Pat took three exams. In Mathematics, her grade was 75, the mean was 90, and the standard deviation…

A: From the provided information, In mathematics, mean (µ) = 90 Standard deviation (σ) = 15 Pat grade…

Q: If you look at the differences between the means, once with 10 participants and one mean with 20…

A: Effect of sample size increase on significant of result.

Q: . NCAE shows that the average score of the students is 80 and sd is 15.  What is

A: From the given information, μ=80σ=15

Q: The Law of Large Numbers states that as the number of observations in a sample increases, the mean…

A: Here we have given the multiple choice question about the law of large numbers. The Law of Large…

Q: Suppose the relationship between Y and X is given by: Y = 30 - 25X + error  What is the expected…

A: Given : Y = 30 - 25X + error

Q: A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey,…

A: Given information- Sample size n = 9 Mean Md = 14 SS = 1152 So,

Q: A sample of n = 5 scores has a mean of M = 8. if one new score with a value of X = 2 is added to the…

A: