If there were 760 students in Jamal’s class, approximately how many students scored higher than Jamal on the quiz if Jamal had a z-score of 1.41?

Q: Then, the relative frequency of the class 22 – 34 is -

A: # Given frequency tabulated data  then to find relative frequency of class(22-34)??

Q: Find the raw score which corresponds to z=1.6?

A:

Q: For a population with μ = 80 and σ = 10,what is the X value corresponding to z = -0.50?

A: Given information Mean (µ) = 80 Standard Deviation(σ) = 10 Z = -0.50 Z-score is given by the…

Q: For a population with  σ = 8,  X=13 and a z-score = 2.21, find the value of µ

A:

Q: The indicated IQ score, x, is

A: Let X represents the distribution of IQ scores. Given that X~N(mean= 100, SD= 15), then Z = (X -…

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

A:

Q: The degrees of freedom are directly related to

A: Let, X1,X2,...,Xn be the samples from normal distribution. Let, S2 be the sample variance.  We know…

Q: the mean = 146, and s =  35 Question #3 A percentage of female students with scores between 41 and…

A: From the provided information, Mean (x̅) = 146 Standard deviation (s) = 35

Q: Three-fourth of the students in the class have an average lQ of 120 and the rest have an average IQ…

A:

Q: e) From the analysis of students' marks, Mr Adam decided to do one-to-one consultation with his…

A: According to the information given in the problem we proceed as follows,

Q: For a population with u = 34 and o = 8, what is the X value corresponding to z = -0.50?

A: We have given that.   X~N( μ , ?^2 )   μ =34 , ? =8      Z-score =( x - μ )/?   Z= -0.50

Q: What is the relationship between Za and Zb? b

A:

Q: For a population with μ = 40 and σ = 7, find the z-score for each of the following X values. (Note:…

A: The Z-score for an X value of 45 is, Thus, the Z-score for an X value of 45 is 0.714.

Q: A random sample of 1000 households was taken and the dollar amount spent monthly on internet service…

A: Given, A random sample of 1000 households was taken and the dollar amount spent monthly on internet…

Q: On a psychology exam with a µ = 76 and σ = 12,  Tom scores at the mean,  Mary had a score of X =…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: For a population with u= 100 and o =20, find the X value that corresponds to the following z- Score=…

A:

Q: Which of the following best describes the picture?

A: Intro.: The given plot is interaction plot. The interaction between two factors defined as the…

Q: What would be the frequency for the class 27 - 30?

A: In the given data, the observation lies between 27-30 is 27,28,29,30.

Q: What is the relationship between q and p?

A: Given that -

Q: Below is the gr-

A:

Q: On a psychology exam withµ= 76 and o = 12, Tom scored 9 points below the mean, Mary had a score of X…

A: From the provided information, Mean (µ) = 76 Standard deviation (σ) = 12 X~N (76, 12)

Q: Compute for the x-scores of the following: z = -0.45, μ = 78.30, and σ = 16

A:

Q: If the Pearson coefficient of skewness for a data set is 1.945, what can be concluded about the data…

A: GIVEN:  Pearson coefficient of skewnes for a data is Sk=1.945  Then data is  1): right skewed  2):…

Q: The numbers of customers entering each of two stores every hour were recorded. The results are…

A: Given that  We solve this problem by using five number summary concept.

Q: On a psychology exam with µ = 76 and o = 12, Tom scored 9 points below the mean (M), Mary %3D had a…

A: Given, On a psychology exam with μ =76 and σ=12, Tom scored 9 points below the mean(M), Mary had a…

Q: A report indicated that two-thirds of all patients on a given day had a CBC. How many out of every…

A: Solution: We are given:A report indicated that two-thirds of all patients on a given day had a CBC.

Q: Suppose X ∼N (-4,1. Between what xx values does 99.72% of the data lie?

A: Given: X ∼N (-4,1 ) To find: Between what xx values does 99.72% of the data lie?

Q: For question #4, write your answer exactly as it appears. 4) It has been known that 18% of victims…

A:

Q: A statistics student surveyed a sample of 36 high school students and asked, "How many days in the…

A: Given information: The data represents the values of number of days in the past week who have…

Q: Given the mean of a certain data set as 155, what will be its new mean if all the data points were…

A: Remark: We know that, The mean (average) of a data set is found by adding all numbers in the data…

Q: The predicted college GPA for a high school GPA of 3.8 and a college board score of 500 is (Round to…

A: The equation of the college GPA is y^=0.16+0.51x1+0.002x2. The variable x1 is defined as the high…

Q: The managers of a brokerage firm are interested in finding out if the number of new clients a broker…

A: Solution-: We have following data: Let, X=New clients and Y=Sales Broker X Y 1 27 5.32 2 11…

Q: The following data gives the profits of a firm (in lakh dollars). Interpolate the missing figures.…

A: Given the data of the profits of a firm (in lakh dollars). We need to interpolate the missing term.

Q: If a psychologist summarized data for a variable in a frequency table but finds that there are so…

A: Given: If a psychologist summarized data for a variable in a frequency table but finds that there…

Q: If there were 500 students in Jamal’s class, approximately how many students scored higher than…

A:

Q: The scores on an Algebra mean of 82. If Kendall scored 67 with

A: Given, Mean= 82 Score obtained= 67 z-score= -2.5

Q: If the mean depth Of a lake is 1.4m, it means that.........

A: it simply mean

Q: In a class in which the final course grade depends entirely on the average of four equally weighted…

A:

Q: Plot the following six points: (- 2, 2) (1, 5) (– 5, – 1) (1, 0) (4, - 4) (0, – 3)

A: The direction on the graph of x-axis and y-axis is given below. The origin is (0,0). The horizontal…

Q: In a survey of 3063 adults aged 57 through 85 years, it was found that 80.8% of them used at least…

A: Number of adults surveyed, n = 3063 And proportion of them used at least one prescription…

Q: What is the value of SS for this sample?

A: Given: n = 4  Σ X = 4 Σ X 2 = 32 The formula to calculate the SS is as follows:

Q: If N = 150, (A) = 93, (B) = 112, (C) = 80, (BC) = 20 and (Ay) = 43, find the greatest and the least…

A:

Q: A man surveyed a sample of 36 high school students and asked, "How many days in the past week have…

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

Q: A set of n = 10 pairs of scores has ΣX = 20, ΣY = 30, and ΣXY = 74. What is the value of SP for…

A: It is given that ΣX = 20, ΣY = 30, and ΣXY = 74.

Q: The scores of five students in an English class following if x represents a score.

A: Given, Let x be the score x= 78, 80, 97, 91, 63

Q: Do you find any inconsistency in the data given below: N= 1,000, (AB) = 483, (Ay) = 378, (BY) = 226…

A: Given that, N = 1000, (Aβ) = 483, (Aϒ) = 378, (Bϒ) = 226, (A) = 525, (B) = 312, (C) = 470 and (ABC)…

Q: The scores on the Wechsler Adult Intelligence Scale are approximately Normal, with ?=100μ=100 and…

A: Given dataMean = 100Standard deviation = 15Probability of scoring less than 130 is given by

Q: Find the z score for test scores of 70 _____ and 90 ______.

A: The z-score of a sample data is Here, mean is 70.3 and standard deviation is 13.5.

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.