in the highest 2.5 percent eat?  What is the z-score

Q: A research report from an independent-measures study states that there are significant differences…

A: a)From the given information, the degrees of freedom treatment is 3.

Q: The salesforce at a certain company successfully closed 94 out of 200 sales calls. What was their…

A:

Q: Students scored the following grades on a statistics test: 80, 80, 82, 84, 85, 86, 88, 90, 91, 92,…

A:

Q: How large a sample should be surveyed to estimate the true proportion of college students who surf…

A:

Q: How smart is your phone? A random sample of 10 Samsung Galaxy smartphones being sold over the…

A: We have given that,  The data set is,  199, 169, 385, 329, 269, 149, 135, 249, 299, 249 standard…

Q: When the Standard Score = -1, what is the percentile of the raw score? %3D O 2nd 14th O 16th 34th…

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

Q: What is the percentile for Colorado, where 10.1% of the residents are aged 65 and olde

A: From the stem plot, we can see that only 4 of the 50 states (7.0%,8.8%,9.8% and 10.0%) having…

Q: The test scores of 20 students are listed below. Find the 34th percentile

A: We have to find the 34th percentile from the given data set.

Q: (d) What is the percentile rank of a bag that contains 1425 chocolate chips?

A: We want the find the percentile rank

Q: invested in bonds. For a = .10, does the test show enough evidence to declare that the proportion of…

A: Given: Sample size, n = 215 x = 91 Population proportion, p = 0.57  significance level

Q: find the test statistic and p value.

A: Given, The data on the number of games played in a yearly best of seven baseball championship series…

Q: Find the 54th percentile, P54, from the following data

A: Given: Number of samples (n) =39 Formula: Note: If "L" is a whole number then the value of the…

Q: What quartile is equivalent to percentile 75?

A: The 75th percentile is value below which 75% of data observations lie. Note : Since you have asked…

Q: What is the z-score corresponding to the 74th percentile

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

Q: A recent study by the u.s. census bureau determined that the median monthly housing rent was $641.…

A: The median is middle value of the observations, above or below which 50% of the observations lie.…

Q: Use the first 30 data values in Table 1. Test, at the 5 percent level of significance, the…

A: (a) The hypothesis to be tested for men and women's mean cholesterol is given as-…

Q: The mean GPA for 138 residents of the local apartment complex is 1.9. What is the best point…

A: Solution: From the given information, the mean GPA for 138 residents of the local apartment complex…

Q: what is the z score for the 44th percentile

A: Obtain the z score for the 44th percentile. The z score for the 44th percentile is obtained below as…

Q: The test score at the 25th percentile is 108. What is the test score at the 75th percentile?

A: Solution

Q: competed in an ironman race, J

A: Here it is given that - 3500 people competed in an ironman race, John finished 805th,

Q: Find the z-score that corresponds to the 63rd percentile

A: we have to find the Z-score that corresponds tothe 63rd percentile.

Q: 1) What is the high score on the test? 2) What percent of the class scored above a 72? 3)…

A:

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: What is the percentile rank x=15 and what is the score for 75th percentile?

A: If the we have no of scores is 15 then we have formula for percentile rank as:…

Q: 45. What is the 75th percentile? a. 10 b. 11 С. 12 d. 13

A:

Q: recent survey by the U.S. Census Bureau determined that the median monthly housing rent was $640. If…

A: Given that  Median=640 First Quartile=496

Q: Given a bag with 13 red marbles, and 42 blue marbles, what is the probability of pulling two…

A: There are 13 red marbles and 42 blue marbles.

Q: nsumption level represents the 6th percentile? nsumption level represents the 17th percentile?…

A: Here it is given that -  Mean (μ) = 2327 Standard deviation (σ) = 584.3

Q: The results of a nationwide aptitude test in Mathematics are normally distributed with μ=80 and…

A:

Q: b. Determine the 82th Percentile value (P82). Provide the exact answer

A: We have given that,  The data set is,  9, 8, 10, 4, 13, 13, 11, 4, 9, 6, 5, 15, 15, 2, 14, 10, 7, 5,…

Q: Below n is the sample size, p is the population proportion and ^p is the sample proportion.  n= 148…

A: Given, Below n is the sample size, p is the population proportion and P^ is the sample proportion.…

Q: (a) What height represents the 95th percentile? (b) What height represents the first quartile?

A: Given: The z score corresponding to the 95th percentile, i.e., p=0.95, i.e., 95% of the area of the…

Q: What well-being score represents the 45 percentile? *

A: It is given that the mean is 100 and the standard deviation is 20.

Q: During the scholarship examination of a certain scholarship grant taken by 10,000 applicants,…

A: Given : Annabelle score (x) =350total number of applicant =10000Number of rank below x =8995

Q: Q3/ What is the test score corresponds to the 33rd percentile for the following data: 15, 12, 5, 16,…

A:

Q: 2. On a placement examination, August scored lower than 1210 of 12,860 students who took the exam.…

A: Given information: On a placement examination, 12860 students appeared. Among these 12860 students,…

Q: What is the percentile for a person that has taken 16 courses? (Your answer should be a %, such as…

A: Percentiles can be calculated using the formula  n = (P/100) x N, where P = percentile, N = number…

Q: Find the closest z-score for the following percentages: The 85th percentile

A: From the provided information, The percentile is 85th.

Q: When the Standard Score = -2, what is the percentile of the raw score? O 2nd O 14th 16th 34th 84th

A: Given that, Standard score = -2

Q: What is the percent of people who are left handed? (Round to the nearest whole percent) Gender…

A:

Q: How could the survey question "Have you ever had a drink of alcohol?" be revised to obtain a valid…

A: Introduction :- We are given one survey question. We have to revise these questions to obtain valid…

Q: What are the steps for Finding Proportions beyond Two Scores?

A: Z-score: Z-score shows how far a score is away from the mean or it shows how standard deviation away…

Q: Which distribution of ACT scores has the highest percentage of students scoring above 21.4? English…

A:

Q: A research report from an independent-measures study states that there are significant differences…

A: Given, A research report from an independent-measures study states that there are significant…

Q: The 77th percentile is O.

A: X~N(50 ,49)Let Q be the 77th percentile .P(X<Q) =0.77⇒P(X-507<Q-507) = 0.77⇒ϕ(Q-507)  =…

Q: Marshall took the SAT ( μ=1010,σ=200) and had a raw score of 950. What was his z-score? What was…

A: Given data,  μ=1010 σ=200 Raw score X=950

Q: is the 95th percentile finish time, ? 95? (Round your answer to nearest tenth

A: To calculate the 95th percentile of a normal distribution, we used the formula as: X=μ+Zσ Where 'X'…

Q: Find the interquartile range, 90th percentile and 5th decile of the data given below:

A:

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.