100 students took an exam, the maximum score for which was 90.   From the graph, what was the lower quartile score?

Q: a. A student performance in certain exam was 10/100, later he got a 98/100, discuss which is better…

A: Range is better than mean to reflect his performance because the mean of the two scores will not…

Q: A survey of 78 men found that 10 have a social media account. Another survey of 51 women found that…

A: Given Information: Women: Sample size (n1) = 51 Out of which X1 = 26 have a social media account.…

Q: Find the percentile, rounded to the nearest percent, for Shaylen's score.

A: Concept: Percentiles are statistical measures that define the percentage of data points lying…

Q: What percent of students had an IQ of at least 120​?

A: From the given histogram, the frequency table can be observed as shown below:

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

A:

Q: Insurance companies are interested in knowing the percent of all drivers who always buckle up before…

A: According to the given information in this question We need to find the minimum number you would…

Q: Based on the above table, you want to create a vlookup table. What would be the range of values that…

A: Given Type of donut  number purchased Chocolate cream filled 7 Strawberry 5 Kale frosted 9…

Q: Almost all U.S. light-rail systems use electric cars that run on tracks built at street level. The…

A: Simple linear regression model: A simple linear regression model is given as y^ = b0 + bx + e…

Q: How many performers earned exactly 3 stars? (be careful - compare the question wording to the scale…

A: The graph displays number of stars on x-axis and percentage of performers on y-axis. Total number of…

Q: After six biology test, Ruben has a mean score of 77. What score does Ruben need on the next test to…

A:

Q: Vhat percent of the population obtains scores of 410 or less? What is the minimum score needed to…

A: Let , X→N(μ=500 , σ=100) Our aim is to find following :  a) P(X≤410) b) The minimum scores needed to…

Q: What percent of scores are below a T score of 56?

A: Given, T score is 56. Now,

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: A graph of data points that  can show the relationship between 2 variables is presented with one…

A: We indicate the independent variable X on X axis and dependent variable Y on Y axis then according…

Q: John calculated r -.44 for a set of n 10 pairs of values that represent the number of absences from…

A: Given that r = -0.44 midterm exam score ( y )   number of absences from class (x)

Q: The fifth unit of a 25-unit job took 14.5 hours to complete. If a 90 percent learning curve is…

A: Here, total time factor for 90 percent learning curve and unit of 5 is 0.783.                ∑Tn =…

Q: Jesse was ranked 36th in his graduating class of 180 students. At what percentile is Jesse's…

A:

Q: Kevin scored at the 70th percentile on a test given to 9940 students. How many students scored lower…

A: Given Kavin got 70 percentile. Total students are 9940.

Q: After taking a series of 4 classroom examinations, John obtained a mean score of 82. How much score…

A: Mean is a part of measures of central tendency.

Q: Let us measure the degree of relationship between the sex and scores of 20 students. Let Male = 0…

A: Given information: The data represents the scores of 20 students. Among the 20 students some are…

Q: Suppose that there is a negative relationship between grade point average and the number of hours…

A:

Q: According to a Mobile Marketing Company's survey of 2000 people, 60% said that they use their mobile…

A: We have to find nom of successes in given sample.

Q: The absolute value for the difference between the two ladies z-score is

A: Let , X→N(μ=15.7 , σ=7.43) Since , the Rena's score on the exam is 9 and Sara's score was 25. We…

Q: ysing 100 students took an exam, the maximum score for which was 90. From the graph, what was the…

A: Let x be the median of test scores. Therefore 50% of the observations are below x. Now there are 100…

Q: Intelligence as measured by IQ score 136 is best described as

A: Hint: There are four types of measurement scales Nominal: it is a Categorical variable that…

Q: A student scored between 81% and 93% on all exams except for one that she failed with a 47% because…

A: Mean & Median : The mean of the data set is calculated by adding all observations in the data…

Q: Which point is outlier?

A: for the given data which point is an outlier?

Q: After six biology tests, Ruben has a mean score of 74. What score does Ruben need on the next test…

A: The mean score of Ruben after six biology tests is 74.

Q: In order to be considered for a scholarship, Kyle must score at least in the 75 percentile of all…

A:

Q: Bob scored at the 65th percentile on a test given to 9960 students. How many students scored lower…

A: x = no. of data value less than x  * 100/total no. of data values

Q: Types of Tests: 2 sample mean t, 2 sample mean z, 2 sample proportion z, difference between means t…

A: Type of test: 2 sample proportion In an SRS of 10572 college students taken in the year 1996, 2358…

Q: On a placement examination, Fatimah scored lower than 420 of the 980 students who took the exam.…

A: It has been given that Fatimah has scored less than 420 of 980 students which means her score is…

Q: The trunk diameter, in centimeters, of a certain variety of pine tree is represented by X~N(150,…

A: We have to find out the z-score for a tree with a diameter of 170 centimeter..

Q: Ranking a group of cities in terms of quality of life would be an example of measurement on a ____…

A: There are several categories which can be used to represent the quality of life within a city.This…

Q: The proportion of people that own cats is 80%. A veterinarian believes that this proportion is…

A: Given that, Sample size n=200 Population proportion p=0.80 Sample proportion of people who owned…

Q: The estimated score will be between

A: Here given regression equation  of hours of studies and test score

Q: The mean weight of 150 students in a class is 60 kg. The mean weight of boys in the class is 70 kg.…

A:

Q: A Harriss poll taken surveyed 2016 adults and found that 423 of them had one or more tattoos. can…

A: The hypotheses for the test is given below.Null hypothesis:H0: p = 0.25Alternative hypothesis:H1: p…

Q: After six biology tests, Ruben has a mean score of 78. What score does Ruben need on the next test…

A: Note that, the required mean is 80. The total number of tests after the next test is 7.

Q: After six biology tests, Ruben has a mean score of 75. What score does Ruben need on the next test…

A: Let 'x' denote the score Ruben need to score on the next, i.e. seventh test so that his average…

Q: The mean score on a test is 75, the median score is 80, and the mode score is 85.  Pat got an 82.…

A: Given: The mean score on a test is 75, the median score is 80, and the mode score is 85.

Q: Use the graph of the best fit line on the scatter plot to made the prediction. If another child in…

A: Here we are given is a scatter plot with the line of best fit. We know that we can make predictions…

Q: Katrina must take five exams in a math class. If her scores on the first four exams are 71, 69, 85,…

A: Given that Katrina scores on the first four exams are 71, 69, 85, and 83 and suppose she scores x…

Q: Pat and Chris both took a spatial abilities test (mean=80, std. dev.= 8). Pat scores a 76 and Chris…

A: Given that, μ=80,σ=8,X-score of pat =76X-score of chris =94 Assume that test score X follows normal…

Q: 350 students took a standardized test, Sarah’s score was ranked at the 7th. What was the percentile…

A: that is (7×100)/350=700/350 =2

Q: What would be the speed of a driver who was at the 96th percentile ? Show all work.

A: X follows a Normal distribution with mean = 184.8 and S.D = 7.2 Then z=(x-mean)/SD = (x-184.8)/7.2…

Q: What is the measure of ∠x in this diagram?

A:

Q: After six biology tests, Ruben has a mean score of 72. What score does Ruben need on the next test…

A:

Q: (a) Estimate the true proportion of all such students who own a Texas Instruments calculator. (b) Of…

A: here given sample of 20 students who had recently taken elementary statistics yielded the given…