the brand manager for a toothpaste brand must plan a campaign designed to increase brand recognition. H1e wants to first demonstrate the percentage of adults who have heard of the product. How many adults must he survey in order to be 95 percent confident that his estimate is within 5 percentage points of the true population percentage? n=?

Q: The quality control engineer at a bottling plant keeps track of the number of bottles that are…

A: Denote p as the true population proportion of overfilled or underfilled bottles.

Q: ) Danny has scored 78, 74, and 72 on the first three exams in his math class. If the standard…

A: Calculate total marks obtained in 3 exam

Q: What proportion of students studied more than 4 hours?

A: Given that Total number of students = 240 Number of students who studied more than 4 hours = 50

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

A:

Q: In what percent of their games would you expect the Dodgers to score more than 7.31 runs?

A: Given: Distribution of games is symmetric, unimodal and bell-shaped.

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: Find the n amount, given that with a 95 percent confidence the error is by three percentage points…

A: Formula : Margin of error: ME=Zα/2 * √p̂(1-p̂)/n

Q: Angela took a general aptitude test and scored in the 88th percentile for aptitude in accounting.…

A: Given that Angela took a general aptitude test and scored in the 88th percentile for aptitude in…

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: The formula for the sample size is as follows: Here,zα/2 is the critical value at 95% confidence…

Q: How large the sample size should be in order to be 98 percent confident, if the sample proportion is…

A: Given data, p=0.78 E=0.16 z-value at 98% confidence is Zc=2.326 n=?

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: In a study of over 15,000 teens, 62% of boys and 55% of girls consumed sugar-sweetened soda on the…

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: b) For which time periods during my exam was my heart rate decreasing? c) How many turning points…

A: Since you have asked multiple part question, we will solve the first 3 part of the question for you…

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

A: Given, T score is 56. Now,

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 reported CORONAVIRUS cases was 1200 in Oman on MARCH, 2021. It was expected to raise to around…

A: The cases were 1200 expected to rise to 1800  ,the cases actually rose to 2500  Expected value is…

Q: In a class of 50 students, Heather has a rank of 14. At what percentile is she? Heather has a…

A: According to the provided information, B = 14 N = 50

Q: The average score in a Science exam was 82 with a SD of 4. The average score on a Math exam was 96…

A: Given : For Science Exam : =82 =4 For Math Exam : =96 =3

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: A researcher reports an F-ratio with df = 3, 36 from an independent-measures research study. How…

A: A researcher reports an F-ratio with df = 3, 36 from an independent-measures research study. It is…

Q: find the p value when the test statistics is -6.61, the df is 10-1, and the level of significance is…

A: Find the p value if  t=-6.61 and df=10-1=9 Level of significance alpha=0.05

Q: he final grades for a statistics course are listed on the picture. answers must be in 4 decimal…

A: sample  x (x-x̄)^2 1 78 25.5025 2 75 4.2025 3 74 1.1025 4 84 122.1025 5 67…

Q: Complete the following statements: 1. In general, _________% of the values in a data set lie at or…

A: Solution : Definition of percentile - The percentile indicates the values below which given…

Q: Es. What is the lowest I.Q. score acceptable for the advanced training ?

A: Let X denote the IQ of army volunteers. Given that X follows N(mean = 110, SD = 10), then Z = (X -…

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: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: Obtain the critical value at 95% confidence level:It is given that the confidence level is 0.95 and…

Q: An investor bought common stock of Blackstone Company on several occasions at the following prices.…

A: The following table provide the price and corresponding number of share is given by:

Q: Angela took a general aptitude test and scored in the 83rd percentile for aptitude in accounting.…

A: Solution: From the given information, Angela scored in the 83rd percentile for aptitude in…

Q: The manager of an orchard expects about 82 percent of her apples to exceed the weight requirements…

A:

Q: A typical middle-income household in 1980 earned $30,983. A similar household in 2009 earned…

A:

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: Solve the following problems.a. After 8 points are added to each score in a sample, the mean is…

A: The sample mean of a sample is computed by dividing the sum of observations by the total number of…

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

A:

Q: The value of a certain car when it was brand new with 0 mileage was $17,000 but the value dropped to…

A: The given scatter plot is a linear and it's slope is negative. Given that, at zero miles the value…

Q: Company X pays its 50 employees a mean monthly salary of Php19,500; a second company Y pays its 62…

A: Given that Company X pays its 50 employees a mean monthly salary of Php19,500; a second company Y…

Q: Why does the use of multiple t tests increases?

A: The multiple t-tests are defined for a one-sample multivariate test and as well as for two samples.…

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: A typical middle-income household in 1980 earned $38,405. A similar household in 2009 earned…

A:

Q: The percentage of scores falling below a z-score of .65

A:

Q: The junior class manages a paper recycling drive for the high school. As the above table shows, each…

A:

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: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: Solution: From the given information, confidence level is 0.95 and E=0.05. Since the proportion is…

Q: In California, we need more rain to sustain the health of our natural environment, argriculture, and…

A: Inches of Rain(x) frequency(f) f*x 1 4 4 2 3 6 3 0 0 4 7 28…

Q: Angela took a general aptitude test and scored in the 85th percentile for aptitude in accounting.…

A: Given, Angela scored 85th percentle. 85th percentile means there is 85% scores below the score and…

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: A recent study in 2013 conducted in Canada showed that house values were reduced in value by an…

A:

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

A:

Q: Students surveyed boys and girls separately to determine which sport was enjoyed the most. After…

A:

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.