A student must have an average​ (the mean) on five tests that is greater than or equal to​ 80% but less than​ 90% to receive a final grade of B.​ Devon's grades on the first four tests were 76​%, 61​%, 90​%, and 77​%. What range of grades on the fifth test would give him a B in the​ course? (Assume that​ 100% is the highest grade​ possible.)

Q: The midpoint of any set of observed values is a. None O b. Mean O c. Geometric mean O d. Mode

A: We have to find correct answer from given option

Q: Use the table below to answer this quesiton:   Leukemia  No leukemia  Exposed to benzene…

A: Risk of something is the odds of it taking place. The absolute risk of something happening is the…

Q: Calculate the absolute and relative errors in the expression: 2a – 3bc +, if the measurement of a =…

A:

Q: In South Australia (SA), the median hourly earnings for male em- ployees rose from $32.23 in 2019 to…

A:

Q: Find the number of students from the following who scored marks not more than 45. Marks range 30-40…

A: Given Information: Marks  frequency 30-40 35 40-50 48 50-60 70 60-70 40 70-80 22…

Q: The mean and S.D. of income of 50 men are Rs. 3200 and Rs. 525 respectively The same for 40 women…

A: Formula for S.D for combined group: σ12=n1(σ12+d12)+n2(σ22+d22)n1+n2          Combined mean is,…

Q: 2. For the frequency tables, find the mean. You will need to create several Frequency A B # Vehicles…

A: Given data : Vehicles frequency 0 3 1 6 2 7 3 9 4 6 5 4   GPA Frequency 0.01…

Q: The following are the marks obtained by 50 students in statistics. Marks Number of Students 10 marks…

A:

Q: The town of Butler, Nebraska, decided to give a teacher-competency exam and defined the passing…

A: Given Information:  The raw test scores ranged from 0 to 100. Nebraska, decided to give a…

Q: eart attack or stroke within one year, and of the ticagrelor patients, 565 suffered a heart attack…

A:

Q: Larry is a 62% free-throw shooter, that is to say that anytime Larry attempts a free-throw, there is…

A: Given data, p=62% =0.62 n=70   Mean=?

Q: How did you come to the conclusion for the relative frequencies numbers being 0.5, 0.10, etc?

A:

Q: Calculate the arithmetic mean from the following Cata : Value Frequency 0-4 328 5-9 350 10-19 720…

A: We have given that the data into grouped frequency distribution. Here we have 8 classes.

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

A: The mean of a data can be obtained as follows:

Q: What is the range of Joey’s first 14 quiz grades? What is the range of Joey’s quiz grades after his…

A: a) Range of first 14 quiz Lowest value=74 Highest value=98   Range=Highest value-Lowest Value…

Q: For certain table which has only been partly reproduced, mean was found to be seltelvab as 1.46. No.…

A: Given data isMean = 1.46 No. of Accidents(x) 0 1 2 3 4 5   Frequency(f) 46 f1 f2 25 10 5 N=200…

Q: The students grades in four subjects are as follows d=[80 70 90 87 81 85 76 82 80 87 77 84] compute…

A:

Q: Calculate the mean (all the three types) from the following data and comment on your solutions.…

A: Mean is the measure of central tendency. There are three types of mean. They are arithmetic mean,…

Q: What is the of the mean 0. P(X=x) 0.15 0.20 0.15 0.50 3.

A:

Q: A student receives the following grades, with an A worth 4 points, a B worth 3 points, a C worth 2…

A: A student receives the following grades: A worth 4 pointsB worth 3 pointsC worth 2 pointsD worth 1…

Q: What percentage of scores fall between the following z scores: -1 to +1; -1 to +2; and -1 to +3?

A: a) -1 to +1 = P(-1<z<1) = P(Z<1)-P(Z<-1)  =0.8413-0.1587 =0.6826 =68.26%

Q: the claim that the average grade of the students is LESS THAN 90. Use 5% level of significance. 91…

A: Given : significance level,  α = 0.05

Q: A company conducted a survey to see whether its new toothpaste was more popular with children or…

A:

Q: The arithmetic mean of the following data (22, 25, 19, 28, 20, 17,30) is 24 O 25 O 23 O to leave O…

A: As per company guidelines I solved only the First questions. Thank you Given data: 22, 25, 19, 28,…

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

A:

Q: On a certain exam, Tony corrected 10 papers and found the mean for his group to be 75. Alice…

A: Given: Tony corrected 10 papers and mean for his group is 75 and Alice corrected the remaining 20…

Q: 14. Estimate y; from the following data : 81 and explain why the value obtained is different from…

A: Given that : X and yx  values are given here by using these value we find missing value of yx  at x…

Q: Given x = 0, 1, 2, 3, 4, 5 how is the mean 1.5? Shouldn't the mean of x be 2.5?

A: Measures of Central Tendency: A measure of central tendency represents the central value or typical…

Q: 2. A student gets the following grades in his seven subjects: 87 for Calculus, 82 for Physics, 79…

A: We have given the following data.

Q: d. Give a 95% interval estimate of the number of fatal accidents per 1000 licenses in a city where…

A: Solution:  Given information: n= 42  Sample size  MSE= 0.3473  Mean square  error  The degree of…

Q: Given that the mean number of centuries scored per player is 1.95, find the value of k.

A:

Q: From the following table, estimate the number of students who ob- tained marks between 40 and 45:…

A: We Solve the given problem using Newton's forward interpolation method.

Q: Given that there are 30 students in a class taking an exam. The average for Past years is μ0=86, σ=…

A: It is given that the population standard deviation is 7 and the true mean is 87.7. Also, the test…

Q: f a score’s relative frequency is 0.27, what is its percent in the distributio

A: From the given information, the relation frequency is 0.27. The percentage corresponding with…

Q: Suppose the mean of Z is 2. What is the mean of Y if a = 1.22 and Y=aZ?  (Use two decimal places,…

A: Suppose the mean of Z is 2. What is the mean of Y if a = 1.22 and Y=aZ? (Use two decimal places, ex:…

Q: Which of the following statements are true? I. In a data-set that is symmetric, the mean is…

A: Here's the explanation is as follows; In a symmetrical distribution, the mean and the median are the…

Q: answer this with solution:   The mean monthly salary of 26 male employees is 35,500 while that of…

A:

Q: The number of goals for each of a hockey player's seasons is given in the following figure. Find the…

A: Given : Goals : Mean = ∑0Xin Mean = 90020 Mean = 45 Median :  arrange the data in ascending order :…

Q: A survey of 700 non fatal accidents showed that 287 involved defective equipment.  Find a point…

A: Given

Q: The Mean of the following student marks equals to 25 mark Frequency 0-10 20-20 8 20-30 30-40 40-50…

A:

Q: µ = 9 has Σ X = 54. How many scores are in the populatio

A: Given that   A population with mean (μ) = 9 Summation of data values  Σ X = 54   We know that Mean =…

Q: Joey's first 14 quiz grades in a marking period were as follows: 86 84 91 75 78 80 74 87 76 96 82 90…

A: Measure of central tendency measures the central or average value of a dataset. Measured of…

Q: To two decimal places, what is the mean of these scores: 10, 15, 17, 17, 2 O 14.50

A: It is an important part of statistics. It is widely used.

Q: From the data given below, find the number of items n. r= +0.5, Ery = 120, o, = 8, Ex = 90 where x…

A:

Q: Geometric Mean GM = VXi. x, • ... = ly X;) - Antily (# E

A:

Q: Which of the following would be an unacceptable level for a Type 2 error in a study?     .80…

A: We have to choose Which of the following would be an unacceptable level for a Type 2 error in a…

Q: What is the formula of a mean

A: we have to writte the fomula of a mean

Q: The students in Ms. Yuri's class reported the number of hours they watched television last week.…

A:

Q: 20. Fred was told by his teacher that the mean final mark of all the students in his class was…

A: Frequency distribution can be either grouped or ungrouped.

Statements and Logic

Logic is the analysis of general patterns of thoughts without regard to any specific sense of context.