In a sample of 47 men, 36 said that they had less leisure time today than they had 10 years ago. In a sample of 47 women, 30 women said that they had less leisure time today than they had 10 years ago. At a = 0.05, is there a difference in the proportions? Use p, for the proportion of men with less leisure time.

Q: The proportion of brown M&M's in a milk chocolate packet is approximately 13%. Suppose a package of…

A: Define the Random Variable, X : Number of Brown M&M out of 50 probability that a M&M will be…

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

A:

Q: Suppose r is .84, compute proportion of variation is explained?

A: From the given information, it is observed that r=0.84.

Q: What percentage of scores would be above 567?

A:

Q: In a sample of 45 men, 27 said that they had less leisure time today than they had 10 years ago. In…

A:

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: d. What percentage of students scored at least 66? e. How many students scored more than 98 on the…

A:

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: 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: Will, an art student, randomly sampled oil paintings in a museum. He wanted to find out how many oil…

A: Given :  Margin of Error  (E) = 0.02 The proportion of paintings that were created using the color…

Q: Kevin scored at the 60th percentile on a test given to 9920 students.How many students scored lower…

A: Given Kevin score = 60th percentile No. Of students = 9920

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: Angela took a general aptitude test and scored in the 84th percentile for aptitude in accounting.…

A: Obtain the percentage of the scores that were at or below her score. From the information, given…

Q: In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050 females, 746…

A: There are two dependent variables which are males and females. The independent variable is using of…

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

A: A percentile can be defined as the value below which a certain percentage of values fall for a set…

Q: How many success in the sample? How many failures in the sample? ? What size sample does the…

A: Answer:-  Given, n=1800

Q: A student has scores of 72%, 74%, and 78% on three exams. What percent score does he need on the…

A: Here we solve the inequality for x . x= score for the fourth exam.

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: An article in the Archives of Internal Medicine reported that in a sample of 224 men, 73 had…

A: Here 224 men and 232 women are selected randomly. 73 of the men had elevated cholesterol levels,…

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

A:

Q: A sobriety test is 96% accurate. Suppose 2500 drivers were pulled over on suspicion ofintoxication,…

A: Given that the sobriety test is 96% accurate, 2500 drivers were pulled over on suspicion of…

Q: The proportion, po, of foraging bumblebees not exposed to pesticides who bring very little pollen…

A: Given: sample of 60 bumblebees(n)=60 39 bumblebees brought back vey little pollen to their nest…

Q: A firm produces bolts whose length x is normally distributed with a Me = 78.3 mm and a SD = 1.4mm.…

A: Given information- Population mean, µ = 78.3 mm SD = 1.4 mm Let X be the length of the bolt produces…

Q: A recent polls show that 61% of adult Americans are comfortable with the legalization of marijuana,…

A:

Q: Out of 1000 people surveyed, 850 said they like chocolate.  What proportion of people surveyed said…

A: Given: The total number of people surveyed is 1000 850 people said they like chocolate We have to…

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: 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 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: Kevin scored at the 60th percentile on a test given to 9920 students. How many students scored lower…

A: Since Kevin scored 60th percentile, it means that Kevin's score is in the top 60 % of amongst the…

Q: In a series of houses actually invaded by smallpox, 70% of the inhabitants are attacked and 85% have…

A: Suppose A & B be two events. Then we know, (A∪B)=(A)+(B)-(A∩B). Consider from the problem that,…

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: a) What proportion of the sampled wafers had (P 2 8)? b) What proportion of the sampled wafers had…

A: 5. a) The frequency is, Number of Particles Cumulative frequency Frequency Number of Particles…

Q: The US population is 13% African American.  If you were to take a SRS of 500 Americans, below what…

A: From the given data The US population is 13% African American

Q: As shown in the table, the average number of siblings (sibs) for 1018 middle class adults is 3.15.…

A: Introduction: It is required to determine if the middle class of the country come from smaller…

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: 2. On a reading test, Amelia's score of 455 was higher than the scores of 4256 of the 7210 students…

A: Obtain the percentile for the Amelia’s score. The percentile for the Amelia’s score is obtained…

Q: For a number X, 40% of X is what percentage of 60% of X?

A:

Q: (d) How high a score must you have in order to be in the top quarter of the population in social…

A: (d) The high score for order to be in the top quarter of the population in social insight is,…

Q: A bicycle manufacturer observes that the number of bike paths in a city affects the number of…

A: here take  x= no. of bike paths y= no. of bicycle sold here compute the regression line and then for…

Q: The table shows the ratios of black socks to white socks in the women's and men's department of a…

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.