(d) If the bottom 10% of students will fail the test, what is the lowest mark that a student can have and still pass this test.

Q: a. What are the estimated sales for the Bryne store, which has four competitors, a regional…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: The failure rate for taking the bar exam in Philadelphia is 41%.  If 375 people take the bar exam,…

A: Given that, The failure rate for taking the bar exam in Philadelphia is 41%  i.e. probability, p =…

Q: At the 2% level of significance, what is the decision?

A: Given : n1=10 , n2=10 , s1=22.4 , s2=12.0 , α=0.02 Our aim is to find the decision. Here , we use…

Q: The placement test for a college has scores that are normally distributedwith μ= 400 and σ= 75. If…

A:

Q: A survey of 62 men found that 12 have a social media account. Another survey of 57 women found that…

A: Men are taken as group 1. Women are taken as group 2.   Given: n1=62x1=12n2=57x2=40α=0.07

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: In fall 2014, 34% of applicants with a Math SAT of 700 or more were admitted by a certain…

A: Let A be the event that student had Math SAT of 700 or more Therefore, PA=0.36 find The probability…

Q: 3. The front row of a movie theatre has 23 seats. If you were asked to sit in the seat that occupied…

A:

Q: Two factory plants are making TV panels. Yesterday, Plant A produced 4000 panels. Ten percent…

A: Given that Plant A produced 4000 panels and defective is 10% Defectives from plant B is 3%,  overall…

Q: On a psychology exam with a µ = 76 and σ = 12,  Tom scores at the mean,  Mary had a score of X =…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: Helga scored in the 70th percentile rank on an exam. If 300 students took the exam, how many…

A: Given: percentile rank of Helga: 70th           total number of students who took exam: 300 students…

Q: ate Kobe was 6'6" (or 78 inches).  Suppose the average height of men is 5'9" (or 69") and SD is 3".…

A:

Q: If a person’s z score equals -2.02, what is their percentile?

A: Given problem Given that   Given Person's z score =  -2.02 Using the Standard Normal Table ( Z Table…

Q: In fall 2014, 36% of applicants with a Math SAT of 700 or more were admitted by a certain…

A:

Q: How did you get the p-value?

A:

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

A:

Q: What are the percentages of scores that fall between -1 and 0/0 and 1

A:

Q: A sample of n equals 20 scores is transformed into z-scores what is the meaning for the set of 20…

A:

Q: Sarah chose to live on the honors floor of her dorm because she was told that the students on that…

A: Null Hypothesis: H0: The mean number of hours is greater than or equal to 11 hours. Alternative…

Q: One sample has a mean of M = 6 and a second sample has a mean of M = 12. The two samples are…

A: Given information- We have given means of two samples. M1 = 6 M2 = 12 We have to find the mean for…

Q: a pollster plans to improve survey results by only conducting polls in which the margin of error is…

A:

Q: There are 12 boys in a class of 30 students. What percentage of the class is boys?

A:

Q: If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

A: If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

Q: of the population have high school scores less than 77?

A:

Q: 9. Would it be unusual for a game to have 25 points scored? Justify your answer in terms of the…

A: From the provided information, Sample size (n) = 10

Q: What does it mean to say the race was too close to call?

A: Here Given  Proportion vote A would receive = PA=0.46 Proportion vote B would receive=PB=0.44…

Q: Suppose that the mean score of 28 students (in a class of 30 students) in a quiz is 28. What should…

A:

Q: How would you interpret a z score of ‐3.0?

A: To finde z score we need mean (mu) and standard deviation (sigma) of the sample. We Calculate z…

Q: A group of researchers want to investigate the academic performance of the college students in…

A: Given that, N = 12000 Margin of error (e) = 0.05 The formula for calculating the sample size is,

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

A:

Q: What is the value of ΣX2 for the scores 2, 4, and 5?

A: The scores are given as 2, 4, and 5.

Q: Con side that the ten Percent of indlividuals getting tested for the Virus, have the Virus. Now…

A: Let A be the event denoteds the person having virus and B be the event denote the event the person…

Q: uppose the proportion of all college students who have used marijuana in the past 6 months is p =…

A:

Q: Sarah works for the Urban Pollination Project at UW. Five years ago, 25% of urban gardens were…

A: From the provided information, 25% of urban gardens were visited by native bees that is p = 0.25 The…

Q: In last year, five ranndomly selected students took a math aptitude test before they began their…

A: a) Excel Procedure: Enter X and Y in Excel>Data>Data Analysis> ‘Regression’>Select Y…

Q: Two factory plants are making TV panels. Yesterday, Plant A produced 8000 panels. Ten percent of the…

A:

Q: If the proportion of Hs is .45 out of 200 flips, what is the p-value?

A: Solution-: Given : We find p-value=?

Q: What proportion of the population score above an 18 on the ACT? What proportion of students score…

A: Given: Let X denote the SAT score thus, X~ N(500, 1002) Let Y denote the ACT score thus, Y~ N(20,…

Q: What score separates the top 1% of students from the bottom 99% ?

A: Given Information: Mean μ=80 Standard deviation σ=20

Q: Which player had the higher average points when compared to the other players on his team? O Fredo

A: Given information: The average points and standard deviations for the players Freda and Kari…

Q: What is the value of SS for this sample?

A: Given: n = 4  Σ X = 4 Σ X 2 = 32 The formula to calculate the SS is as follows:

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: In fall 2014, 34% of applicants with a Math SAT of 700 or more were admitted by a certain…

A: All the given data is shown in the tree diagram

Q: In fall 2014, 38% of applicants with a Math SAT of 700 or more were admitted by a certain…

A: LetA - Percent math S A T score of less than 700 or more in all applicants.B – Percent math SAT…

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

A:

Q: A manager for Shopee wants to determine the current percentage of Filipino adults who now use the…

A: The Cochran formula is used to determine the minimum sample size for the estimation of population…

Q: A nursing school professor is interested in determining how her college students compare to the…

A: Let X denote the exam score, then assuming that X is normally distributed with mean, µ = 100 and a…

Q: is winning the election (in other words, his support rate is higher than 50%)?

A: Here confidence interval for proportion is as shown in further step

Q: On a multiple choice test with 9 questions, each question has four possible answers, one of which is…

A: It is given that there are 9 questions and each question having four possible, one of which is…

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.