In a Statistics examination, the mean score is 82 and the standard deviation is 3.5. What is the Z- score of a particular student whose score is 90? a) 2.92 b) 2.29 c) 2.19

Q: The number of goals scored by a college soccer team for a given season are 4, 9, 0, 1, 3, 12, 3, 7,…

A: The population mean is, μ=∑xN=4+9+0+1+3+12+3+7+4+5+8+212=5812=4.8333 The population mean is 4.8333.

Q: The lowest and the highest data value of a data set are 12 and 28 respectively, then the approximate…

A:

Q: What is the mean for the following scores? Scores: 4, 6, 14

A: For a set random variable X of size n, the mean is defined as x̅ = ΣX/n.

Q: the following data set represents the number of new computer accounts registered during 5…

A:

Q: Pam is planning to take a SAT Prep course. She asks 7 of her older sister's friends who used a prep…

A:

Q: 1.Find the mean and standard deviation for the data

A: Given: No. of batteries, n=10 Time (x) 397 355 415 395 352 436 327 417 276…

Q: For the set of scores 5,10,10,15,25 calulate the mean, median,mode,range variance, and standard…

A: We have given that data  5,10,10,15,25 Mean = sum of all observations/total number of observations…

Q: A sample mean has a z= -4.0 on the sampling distribution created from the population of psychology…

A:

Q: Angela polled her first grade class about their family pets. The following data lists the number of…

A:

Q: Of the 500 people who took the civil servant acceptance test in one government agency, the average…

A: We have given that  Mean=67.5 Standard deviation=5.2  Find A) P(55.6<x<61)B) P(x>65)

Q: The highway mileage (mpg) for a sample of 8 different models of a car company can be found below.…

A: The highway mileage (mpg) for a sample of 8 different models of a car company is given as:19, 23,…

Q: A statistician was exploring a set of data representing a group of 121 women.  The mean was 49 and…

A: Sample size, n = 121 Mean = 49 Variance σ2 = 9 We have to find the standard deviation.

Q: The scores and the percents of the final grade for a student in a stats class are given. What is the…

A: The student’s mean score is calculated below:

Q: Five friends were comparing the height of their dogs. The heights at the shoulders were 400mm,…

A:

Q: Given the sample data 85 85 85 85 85 85 85. Find the variance and the standard deviation of the…

A: Let X denote the sample data. The standard deviation of the data can be calculated as SD =…

Q: The following are two data sets on car dealership sales at two dealerships. Which data set has the…

A: The standard deviation formula: standard dveiation = ∑xi-x2n-1Here,Xi= sample valuesx = sample meann…

Q: Given the set of data: (77, X. 75, 79, 79, X, 76, 75, X, 76}. If the unknown data X is the mode and…

A:

Q: Find the deviations from the mean for the set of data: 26, 29, 22, 24, 24. Score 26 29 22 24 24…

A: Given Data is, 26,29,22,24,24 mean,x¯ =26+29+22+24+245=25

Q: he accompanying​ table, which describes the number of adults in groups of five who reported…

A: x p(x) xp(x) (x-xbar)^2 p(X)*(x-xbar)^2 0 0.192 0 2.027776 0.389333 1 0.367 0.367 0.179776…

Q: You recorded the time in seconds it took for 8 participants to solve a puzzle. The times were: 15.2,…

A: Given data set, 15.2, 18.8, 19.3, 19.7, 20.2, 21.8, 22.1, 29.4.

Q: Consider the data:  10, 7, 9, 13, 11, 13, 14.  (Show your work.) a)Determine the mean.…

A:

Q: find the mean if Z-score =14, st.Dev.=2.5, for a score of 8.5

A: Standard normal distribution:The standard normal distribution is a special case of normal…

Q: C2. GSS 2014 and GSS 2018 respondents were asked their opinion on whether homosexuals should have…

A: Given information: GSS 2014 and GSS 2018 respondents were asked their opinion on whether…

Q: Which statistical tool studies the relationship between two or more variables? a. Median b.…

A: Answer: Correct option is:  b. Correlation

Q: Complete the statement: Almost all the observations in any data set lie within standard deviations…

A: 68-95-99.7-rule: Let X be an observation from a normal distribution, having mean µ and standard…

Q: Which data set would you expect to have the highest standard deviation? Why? Heights (lengths) of…

A: 7. Answer: The b) Heights of all elementary school children have the highest standard deviation.

Q: d the mean and standard deviation of the number of red-headed Scots in a randomly selected group of…

A: Let X be the random variable from binomial distribution with probability of  red hair for Scottish…

Q: Which is not a measure of dispersion? a. Mean b. Standard deviation c. Variance d. Range

A: Explanation: The measure of dispersion is as follows: Standard deviation Variance Range…

Q: Consider the data: 12, 9, 11, 15, 13, 15, 16. (Show your work.) a) Determine the mean. b)…

A: To determine, Mean  Median  Standard Deviation Given data: n=7

Q: In a psychology class, 40 students have a mean score of 89.5 on a test. Then 24 more students take…

A: Given,n1=40 , x¯1=89.5n2=24 , x¯2=78.3

Q: Given the set of data: {77, X, 75, 79, 79, X, 76, 75, X, 76}. If the unknown data X is the mode and…

A: Central tendency : A central tendency (or live of central tendency) may be a typical or central…