In a class of 50 students, Heather has a rank of 14. At what percentile is she? Heather has a percentile rank of (Round to the nearest integer as needed.)

Q: If there were 760 students in Jamal’s class, approximately how many students scored higher than…

A: The probability that z-score is greater than 1.41 is calculated as follows: PZ>1.41=1-PZ≤1.41…

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

A:

Q: Kevin scored at the 70th percentile on a test given to 9920 students. How many students scored lower…

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

A:

Q: If you have a z-score of 4.00 and the body proportion is .99997 and the question is asking for the…

A: The z-score is given by 4.

Q: A sample selected from a population gave a sample proportion equal to 0.60.

A:

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: Given Information: Country A: Sample size n1=1004 Sample proportion p^1=0.53 Country B: Sample size…

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: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: There are two independent samples which are Country B and Country C. We have to test whether the…

Q: d) What percentage of women are TALLER than 5 feet 11 inches? Round to nearest tenth of a percent. %…

A: Given Information: Mean height of adult men = 69.8 inches The standard deviation of height of adult…

Q: е. Find her percentile scores for the two exams. (use R-code)

A: The score of Mathematics is 94.6 and the score of  Physics is 93.7 Mean score of  mathematics 86.1…

Q: On a reading examination given to 900 students, Elaine’s score of 602 was higher than the scores of…

A: Solution

Q: d. What percentage of students scored at least 66? e. How many students scored more than 98 on the…

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: Angela took a general aptitude test and scored in the 86th percentile for aptitude in accounting.…

A: Percentiles:If the elements in the data set are arranged in ascending order of magnitude, then the…

Q: Use the figure to the right, which shows the percentages of adults from severa power plants in their…

A: Null hypothesis: H0: pl=p2 Alternative hypothesis: Ha: pl≠p2

Q: A sample has SS= 20 and s2 =4. How many scores are in the sample?

A:

Q: Angela took a general aptitude test and scored in the 92nd percentile for aptitude in accounting.…

A: In the question given, Angela has scored in the 92nd percentile for aptitude in accounting.

Q: Kevin scored at the 60th percentile on a test given to 9920 students. How many students scored lower…

A:

Q: ) Convert each exam score to a standard score z. ) On which test did he do better compared to the…

A: It is given that For accounting, score = 116, mean = 102, SD = 14 For biology, score = 82, mean =…

Q: "Brand of soft drink" is measured on a(n)

A: Brand is a tag or label that a soft drink has. A nominal scale is a type of measurement scale in…

Q: a sample of ore is found to be 0.0012% diamond and 0.033% copper. What is the percentage of matter…

A: Given:- A sample of ore is found to be 0.0012% diamond and 0.033% copper To find:- The percentage of…

Q: In a random survey of 1500 adults in California and 1000 adults in Oregon, you found that 228…

A: Given that

Q: given: mean= 68.73 s.d. 9.03 find what percentage of the scores fall above 50?

A: Given μ=68.73 and σ=9.03 consider,…

Q: A sample of size 26 was gathered from high school seniors to estimate how many intended to attend…

A: Given that  Sample size (n) = 26 The proportion answering Yes (P) = 0.9 P = 0.9 ; Q=1-P = 1-0.9 =0.1…

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: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: According to the provided data, a total of 3000 households were contacted to participate in the…

Q: Celyn is among the 1500 students of the school.If Celyn's score based on the Standard-Binet test is…

A: Given: Number of students = 1500 Score on standard Binest test is 105

Q: 23. Calculate the SS for your D scores:

A: We have given that the researcher would like to evaluate the effectiveness of a pain-relief patch…

Q: Roxanne ranks 10th in a class of 40. Her percentile rank is

A:

Q: A random sample was taken and the data is shown below. For the data shown, answer the questions.…

A: Mean: The arithmetic mean (also called the mean) is the most commonly used measure of central…

Q: Carter conducted an experiment to see how many people who passed by him at the park were wearing…

A: Given,          Carter conducted an experiment to see how many people who passed by him           at…

Q: eviclara rs has declined in 1%, and the use of 7% to 20.4%. A ity indicated that 54 urvey. At the a…

A:

Q: A sample consists of n = 16 scores. How many of the scores are used to calculate the range?

A:

Q: On a placement examination, Rick scored lower than 1228 of the 12,730 students who took the exam.…

A:

Q: In a random sample of college freshmen, the proportion who use text messaging daily was 0.93. In a…

A: Given, In a random sample of college freshmen, the proportion who use text messaging daily was 0.93…

Q: d) What percentage of women are TALLER than 5 feet 11 inches? Round to nearest tenth of a percent.…

A: formula for z-score is

Q: In a class of 80 students, Heather has a rank of 16. At what percentile is she? Heather has a…

A: Heather has rank 16 in a class of 80 students. The number of students having rank after Heather is,…

Q: On a reading test, Amelia’s score of 455 was higher than the scores of 4256 of the 7210 students who…

A: Number of data values less than 465= 4256 Total number of data values= 7210 Percentile=?

Q: Below are the scores that students get from a 50-item online assessment. Compute for the passing…

A: Question1 solved in step2 and Question2 solved in step3

Q: Sleep Aids. The additional sleep, to the nearest tenth of an hour, obtained by a sample of 100…

A: Quantitative variable: A variable that provides numerical values of individual and Arithmetic…

Q: On a reading test, Shaylen's score of 455 was higher than the scores of 4252 of the 7274 students…

A: The percentile of score x is calculated by below formula percentile of score x =Number of data value…

Q: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: The number of households not willing to participate in the survey is 1200.

Q: a. How many of the 125 people had resting pulse rates of more than 100? b. What percentage of people…

A: a. There are totally 125 people who had resting pulse rates. Count the number of dots that are above…

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

A: Solution: Let X be the trunk diameter in centimeters of a certain variety of pine trees. From the…

Q: Given μ=25and σ=4.8,what would be the x-value for the ninety-fifth percentile?

A: Given:  μ=25 σ=4.8

Q: Use the following scores to find the value of (Ex)² = %3D 4 3. 2.

A:

Q: A bicycle manufacturer observes that the number of bike paths in a city affects the number of…

A: here take  x= no. of bike paths y= no. of bicycle sold here compute the regression line and then for…

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.