multiple choice
Transcribed Image Text:For a population with µ = 80 and o = 10, what is the z-score corresponding toX = 95? %3D а. +0.50 ОБ. +1.50 О с. +0.25 O d. +0.75
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 SX = 40. How many scores are in the population?
A: It is given that, the population mean is µ = 6 and ΣX = 40.
Q: 11. Out of 485 students, Roger equal to 'or lower than Roge 12. A group of 750 people tak« 65th…
A: percentile - score below which given percentage of scores fall
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: 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: One sample of n = 10 scores has a mean of M = 8, and a second sample of n = 5 scores had a mean of M…
A: Click to see the answer
Q: The data for the height of women is approximately bell-shaped. If a woman’s height has a z-score of…
A: Given that Z-score is -1.3
Q: A sample of n = 5 scores has a mean of X-bar = 9. What is ∑X for this sample?
A: Click to see the answer
Q: A score of 251 is how many z-scores above the mean?
A: Concept: A z-score is known as the standard score that determines how much the data point deviates…
Q: A score of 41 is how many z-scores below the mean?
A: Given information: μ=146σ=35X=41
Q: The population data has a correlation of .60. What is the probability that you will get a sample…
A: Introduction: Suppose r is the sample correlation coefficient between two variables, based on a…
Q: - What percentage of guesses fell between z-scores of -1.0 to +2.0?
A: Click to see the answer
Q: The US population is 13% African American. If you were to take a SRS of 500 Americans, below what…
A: From the given data The US population is 13% African American
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: In general,_____% of the values in a data set lie at or below the 94th percential. _______% of the…
A: Click to see the answer
Q: In a sample of n=6 scores, five of the scores are each above the mean by one point. Where is the…
A: Given information- Sample size, n = 6 We have given that five of the scores are each above the mean…
Q: In a sample of n=6 scores, five of the scores are each above the mean by one point. Where is the…
A: It is given that the sample contains six scores. Five scores are located one point above the mean…
Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…
A: For the first first , Claim is the population of adults in country C who favor building new nuclear…
Q: 3. Suppose that you randomly picked 100 iPhones and calculated the average battery life for these…
A: The objective is to guess the average battery life of 100 iPhones.
Q: A set of n=5 pairs of X and Y values has SSx=16, SSy =4 and SP=2. For these data, what is the…
A: Given sample size n = 15SSx = 16, SSy = 4 and Sp = 2.The pearson correlation coefficient is…
Q: A population has u=100 σ=20. If you select a single score from this population, on the average, how…
A: Given that u=100 σ=20. Empirical Rule: The percentage of values lies between one standard…
Q: A set of n= 5 pairs of X and Y values has SSx = 16, SSy = 4 and SP = 2. For these data, what is the…
A: It is given that, SSx is 16, SSy is 4, and SP = 2.
Q: A set of n = 5 pairs of X and Y values has SSX = 16, SSY = 4 and SP = 2. For these data, what is the…
A: Click to see the answer
Q: A set of n=5 pairs of X and Y values has SSx = 16, SSy = 4 and SP = 2. For these data, what is the…
A: It is given that, SSx is 16, SSy is 4, and SP = 2.
Q: How many Biology students’ records need to be sampled to estimate the percentage who earn "A"s to…
A: The proportion is not provided therefore in worst case it can be assume as (p) 0.5. Margin of error…
Q: The percentage of scores falling below a z-score of .65
A: Click to see the answer
Q: In a sample of n=6 scores, five of those scores are each above the mean by one point. Where is the…
A: The formula for mean is given as: X¯=1n∑Xi We are given that: n=6X1=X2=X3=X4=X6=X¯+1
Q: Briefly, for a normally distributed variable, how do you obtain the percentage of all possible…
A: Consider, X1 and X2 be the random variables that follow the normal distribution with mean (µ) and…
Q: Briefly, for a normally distributed variable, how do you obtain the percentage of all possible…
A: The procedure for obtaining the percentage of all the possible observations that lie within the…
Q: Briefly, for a normally distributed variable, how do you obtain the percentage of all possible…
A: Standard normal distribution: The standard normal distribution is a special case of normal…
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: Is a value of r=0.75 from a sample of 100 more significant than a value of r=0.30 from a sample of…
A: Click to see the answer
Q: If you calculated a correlation coefficient to be 1.06, what conclusions can you draw?
A: Here is Given r = 1.06 which is correlation coefficient between the variables.
Q: A study reported a correlation between height and weight r = .5, p < 0.05. What is the proportion of…
A: Here correlation between height and weight is r = 0.5 and p<0.05
Q: How many levels are in each factor of a 2 x 2 ANOVA? 2. 4. 8. can not determine
A: How many levels are in each factor of a 2 x 2 ANOVA? 2. 4. 8. can not determine Explanation: Here,…
Q: Which scatter plot shown has a correlation coefficient, r, closest to -0.5?
A: Two graphs are given. We need to determine scatter plot shown has a correlation coefficient, r,…
Q: Which scatter plot shown has a correlation coefficient, r, closest to -0.5?
A: Click to see the answer
Q: Personal wealth tends to increase with age as older individuals have had more opportunities to earn…
A: Here, the explanatory variable is total wealth (in dollars) and age (years) is the response…
Q: Personal wealth tends to increase with age as older individuals have had more opportunities to earn…
A: (1). Determine the estimated total personal wealth when a person is 50 years old: Multiple linear…
Q: Personal wealth tends to increase with age as older individuals have had more opportunities to earn…
A: (d). Determine there is a significant relationship between wealth and age at the 10% level of…
Q: Personal wealth tends to increase with age as older individuals have had more opportunities to earn…
A: Click to see the answer
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