The brand manager for a brand of toothpaste must plan a campaign designed to increase brand recognition. He wants to first determine the percentage of adults who have heard of the brand. How many adults must he survey in order to be 95​% confident that his estimate is within five percentage points of the true population​ percentage? Assume that a recent survey suggests that about 75​% of adults have heard of the brand.  N=?

Q: Alex is planning to buy a franchise from Home Deco to sell decorations for the home. The table below…

A:

Q: A recent study indicated that 20% of 133 women over age 55 in the study were widows.  a. How large a…

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: 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: Select the correct statement below   a) If the nineteenth percentile has a value of 0.8, this…

A: We know if X is pth  percentile value that means their are p percent values are less than X.

Q: A sample with a mean of M=8 has an EZ= 56  how many scores are in the sample?   the number of…

A: Given that, Mean = M = 8 EZ= 56  n = ?   Definition of mean :  Mean is defined as sum of all…

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

A:

Q: A microbiologist wants to estimate the concentration of a certain type of bacterium in a waste-water…

A: A microbiologist puts a 0.5 mL sample of the wastewater on a microscope slide and counts 39…

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: figure to the nght, hich shows the percentages of adults from several countries who favor building…

A: The survey included the random sample 1125 adults from country A, 1003 adults from country B, 1019…

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

A: Given, T score is 56. Now,

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

A: Given information- Margin of error, E = 7% = 0.07 Confidence level, c = 80% Since nothing is known…

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 data for the height of women is approximately bell-shaped. If a woman’s height has a z-score of…

A: Given that  Z-score is -1.3

Q: The nightshift workers in 3 of Super Bo’s specialty stores stock about 500 (SD = 12.56) products in…

A: Let μ be the population mean. The hypothesis is, Null hypothesis: H0:μ=496 Alternative hypothesis:…

Q: b. If the study had found that 51 of the 80 students were working then: ZSTAT =| (Round your answer…

A: Given sample size, n = 80 students population proportion of working = p = 0.48 51 of the 80 students…

Q: Diastolic blood pressure in adults is normally distributed with m = 80 mm Hg and s = 12 mm Hg. In a…

A: The probability that diastolic blood pressure below 70 mm Hg is,

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: What percentage of scores is between a z of ‐2 and a z of +2? Why is this important?

A: Use Empirical rule to solve it

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: A researcher wishes to estimate the proportion of corporate executives whose annual salary is over…

A:

Q: In a study, the rate of success of initial vaccination among 330 subjects receiving the 1:10…

A: Given: Sample size of subjects (n) = 330 Sample proportion or success rate p^=0.971 Hypothesized…

Q: s the newly hired manager of a company that provides cell phone service, you want to determine the…

A: It is given that margin of error (E) is 0.92 and the confidence level is 0.90.

Q: When designing a study to determine this population proportion, what is the minimum number of…

A: Solution: From the given information, confidence level is 0.95 and E=0.02.

Q: In an outbreak of typhoid fever among attendees of an acquaintance party, 99 persons ate spaghetti,…

A: Given that:  n1=99  x1=30 n2=63 x2=20

Q: In a sample of 47 men, 36 said that they had less leisure time today than they had 10 years ago. In…

A: We have to perform test for difference in two proportion.

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: A nutritionist claims that the proportion of females who consume too much saturated fat is lower…

A:

Q: O B. Yes, the pulse rate of beats per minute appears to be an outlier because it is far away from…

A: Answer 77)  The expression Zα  denote the Z score with an area of αto its right.    p(z>zα)=α

Q: A researcher wishes to estimate the proportion of adult males who are less than 5 feet 5 inches…

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.90.

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: d) Theth percentile corresponds to this score, which means that 299 is (Round to five decimal places…

A: Now finding the answer for (d) Given that the best score is 299 now we have to find percentile…

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: The percent P of the U.S. population with Internet access is given by 25P − 34t = 1378 where t is…

A: Given: The percent P of the U.S. population with Internet access is given by   25P - 34t = 1378…

Q: In many states, a 17% risk of a car accident with a blood alcohol concentration of 0.08 is the…

A: Since, it is given that in many states, a 17% risk of a car accident with ablood alcohol…

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

A: The error is ±1.96×p1-pn=0.05assume p=0.5. This will give the most conservative estimate square on…

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: A SRS of 60 students was interviewed to determine the proportion of students who preferred the new…

A: n = 60 Number of success = 37

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 survey of 700 non fatal accidents showed that 287 involved defective equipment.  Find a point…

A: Given

Q: Asians and Hispanics. At a=0.05, can you reject the claim that the proportion of newlywed Asians who…

A: Answer is explained below

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

A:

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: 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: One researcher wants to estimate the proportion of MU students who are vegetarian, 6 answered "yes".…

A:

Q: A sample of students is to be selected to estimate the proportion who have recieved a medical…

A: The known values are,   The sample proportion is, Critical values: By using the standard normal…

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

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.