The College Board National Office recently reported that in 2011-2012, the547,038 high school juniors who took the ACT achieved a mean score of 530 with a standard deviation of 123 on the mathematics portion of the test. Assume these test scores are normally distributed. d. How high does a student have to score to be in the top 10% of the high school juniors on the mathematical portion of the test?

Q: In a multiple-choice examination in Chemistry, students Mae and Julie received scores of 82 and 65,…

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

Q: A marketing researcher for a phone company surveys 70 people and finds that the proportion of…

A: Solution: a. From the given information, the proportion of customers who are likely to switch…

Q: the scores are normally distributed with a mean of 75 and a standard deviation of 9. What…

A: Note: As per the guidelines, only first three sub-parts (1., 2. and 3.) are solved here. Given data:…

Q: On a statistics exam, the mean score was 80 and there was a standard deviation of 7. If a student's…

A: Given data, μ=80σ=7If x=92z=?

Q: A random sample of 54 four-year-olds attending day care centers provided a yearly tuition average of…

A: Given n=54 X-bar=3912 Standard deviations=615

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, The points of final exam follows normal distribution with mean 73 and standard deviation 8.…

Q: College Professors have incomes with a standard deviation that is more than $21,000. A recent study…

A:

Q: Find the mean and standard deviation for the numbers of sleepwalkers in groups of five.

A: Given: X P(x) 0 0.175 1 0.357 2 0.318 3 0.118 4 0.028 5 0.004

Q: On a nationwide math test, the mean was 60 and the standard deviation was 7. If Roberto scored 90,…

A:

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given data, Mean = 69 SD = 7

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given dataMean = 74Standard Deviation = 9a)The Lowest Score for A grade is given by p-value will be…

Q: 95% of 80 freshman history students scored between 70% and 80% on a take home quiz. If this data is…

A: Given,  n=80 α= (1-0.95) =0.05 Let X denote the score of freshmen. As per t-distribution table, the…

Q: A manager is interested in finding the average number of sales per day at a sporting goods store. If…

A: Obtain the sample size. The sample size is obtained below as follows: Use EXCEL Procedure for…

Q: A recent study shows that out of 5, 000 people who moved to Arizona, 2, 350 did so to take a new…

A: From the given information, sample size n = 1000. Total number of people moved n(S) = 5000. Number…

Q: In a normally distributed data set with a mean of 22 and a standard deviation of 4.1, what…

A: According to the given information, we know that The distribution is normal. Mean = 22 Standard…

Q: A biologist found the wingspan of a group of monarch butterflies to be normally distributed, with a…

A: A biologist found the wingspan of a group of monarch butterflies to be normally distributed, with a…

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given μ= Mean =71 σ= standard deviation =8  Top​ 10% receive​ A's  Next​ 20% received​ B's Middle​…

Q: For a population with a standard deviation of 6, what is the z score corresponding to a score that…

A: We are given that,Standard deviation = σ = 6And a score that is 12 points above the mean

Q: a. If PO1 Dela Cruz's waist girth is 32, how many standard deviations away is he from the mean? b.…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, final exam score follows normal distribution mean 73 and standard deviation 8. Grades are…

Q: In a large section of a statistics class, the points for the final exam are normally distributed,…

A:

Q: The final grades in a math class has a mean of 77 and a standard deviation of 9.77 if the professor…

A: Here we need to find the cutoff for A grade. Given that the top 10% are given A. We assume that the…

Q: I don't understand how to solve for this. I'm having trouble understanding the percentages

A: Let us define the random variable X as the points for the final exam that are normally distributed…

Q: The College Board National Office recently reported that in 2011–2012, the 547,038 high school…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: The mayoral office surveyed the number of people who use each of the city's public shelters every…

A:

Q: 95% of 80 night students scored between 70% and 80% on a quiz. If this data is normally distributed,…

A: Given: Total number of students n=80.             let X  denote the marks of students then,  X ~N(µ,…

Q: In a large section of a statistics class, the points for the final exam are normally distributed,…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: The golf scores for a school team were normally distributed with a mean of 68 and a standard…

A: Let X be the golf scores. It is given that X is normally distributed with mean 68 and standard…

Q: The current government economic survey wishes to know, with 96% confidence, the average household…

A:

Q: n a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: The mean incubation time 69 and standard deviation 8 The lowest score for A is calculated as…

Q: The final exam scores in a statistics class were normally distributed with a mean of 63 and a…

A: The final exam scores in a statistics class were normally distributed with a mean of 63 and a…

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Finding the lowest score that would qualify a student for an A grade:The points for the final exam…

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: From the provided information, X 0 1 2 3 4 5 P(x) 0.169 0.363 0.306…

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given that the mean value is 76 and the standard deviation is 7. Grades are assigned such that the…

Q: In a large section of a statistics class, the points for the final exam are normally distributed,…

A:

Q: THE SCORES ON THE SAT MATH HAD A MEAN OF 431 AND A STANDARD DEVIATION OF 117. What percent of…

A:

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: The mean incubation time 69 and standard deviation 18 The cutoff for A is calculated as follows:…

Q: The credit scores of 35-year-olds applying for a mortgage at Ulysses Mortgage Associates are…

A: (a) Obtain the credit score that defines the upper 5 percent. The credit score that defines the…

Q: Statewide, the population as a whole watches 6.2 hours of TV per day. A random sample of 1017 senior…

A: Given data is appropriate for testing of hypothesis to test z-test for single mean because it is a…

Q: The mean June midday temperature in Desertville is 36°C and the standard deviation is 3°C. Assuming…

A: Determine the number of days in June would be expected the midday temperature to be between 39°C and…

Q: A college professor noted that the grades of his students in an introductory statistics class were…

A: Given that, Mean = 52.50 Standard deviation = 9

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given Information :  In a large section of a statistics​ class, the points for the final exam are…

Q: If the average height of all women is 63.5 inches and the standard deviation is 2.5 inches,…

A:

Q: Refer to the accompanying​ table, which describes the number of adults in groups of five who…

A: Mean :-  ∈x = ∑  ×. Px                           ∈x =…

Q: The Virginia Cooperative Extension reports that the mean weight of yearling Angus steers is 1152…

A: Given information- Population mean µ = 1152 pounds Standard deviation σ = 84 pounds We have given…

Q: Multiple questions

A: Given dataMean = 71Standard Deviation = 8a)The Lowest Score for A grade is given by p-value will be…

Q: 3. In the qualifying examination for the admittance to college, the mean score was 65 and the…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Would it be reasonable to use the standard deviation formula?

A: here  According to a gallup survey of boys 77% of boys had played computer games in the past week…

Q: Suppose a class average on a test is 75 and the standard deviation is 10. if joe scores 80 on the…

A:

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, Mean = 71 SD = 8

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.