In a random sample of college freshmen, the proportion who use text messaging daily was 0.93. In a random sample o post-graduate students, this proportion was 0.78. Researchers computed a p-value and found there to be a significant difference in the proportions. Which of the following would most likely be the p-value that the researchers computed? Select one: a. 1.312 b. 0.0042 c. 0.8315 d. 0.5000

Q: Approximately 10% of students have a composite score below what level

A: If X is the composite score of the students, then we need to search for a x, such that P[X≤x]=0.1.

Q: In a large data set, the 49th percentile is 523 and the 71st percentile is 675.  About what…

A:

Q: A recent survey by the U.S. Census Bureau determined that the median monthly housing rent was $643.…

A: W heaven to find asked percentage from given data.

Q: For a population with  σ = 8,  X=13 and a z-score = 2.21, find the value of µ

A:

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

A:

Q: A survey of 225 residents of a neighborhood indicates that 135 of them are in favor of having a…

A: Given, total residents = 225 135 are in favor of block party.

Q: A sample selected from a population gave a sample proportion equal to 0.60.

A:

Q: A recent survey by the U.S. Census Bureau determined that the median monthly housing rent was $637.…

A:

Q: In a class of 95 students, the heights of two students were measured and found to be 165 cm. If this…

A:

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

A: Given Information: Country A: Sample size n1=1004 Sample proportion p^1=0.53 Country B: Sample size…

Q: The town of Butler, Nebraska, decided to give a teacher-competency exam and defined the passing…

A: Given Information:  The raw test scores ranged from 0 to 100. Nebraska, decided to give a…

Q: In a study between the amount of rainfall (X) and the quantity of air pollution (Y) removed, the…

A: Given data set is x y 4.3 126 4.5 121 5.9 116 5.6 118 6.1 114 5.2 118 3.8 132 2.1…

Q: What percentage of the sample were female drivers?

A: It is given that Total = 5+7+11+9 = 32 Number of females = 7+9 = 16

Q: A September, 2014, survey indicated that 53% of U.S. adults aged 18–29 used the social media…

A: Let total number of adults of U.S., aged 18-29, be x.   Given: Adult used instagram=53% of x=2Adult…

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

A:

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

A:

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: n Exton School, 60% of the boys play football and 36% of the boys play ice hockey. Given that 40% of…

A:

Q: A recent study by the u.s. census bureau determined that the median monthly housing rent was $641.…

A: The median is middle value of the observations, above or below which 50% of the observations lie.…

Q: C) What percentage of CT scans in this target population would be positive?

A: Given: P(Cancer) = 3% = 0.03 P(No cancer) = 1-0.03 = 0.97. P(test positive|cancer) = 89% = 0.89…

Q: Consider a survey in which 1000 people are asked “How often do you go to the dentist?”  The variable…

A: Given: Number of people that have been involved in the study = 1000

Q: For a population with u = 80 and o = 10, what is the X value corresponding to z-score = - 2.00? Edit…

A:

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

A: The proportion of Heads is .45 out of 200 flips.

Q: For his Sociology project, Keith chooses a stratified sample of 10%, which reflects these age…

A: here given , for his sociology project ,keith chooses a stratified sample of 10% , so here selecting…

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 size 26 was gathered from high school seniors to estimate how many intended to attend…

A: Given that  Sample size (n) = 26 The proportion answering Yes (P) = 0.9 P = 0.9 ; Q=1-P = 1-0.9 =0.1…

Q: in the highest 2.5 percent eat?  What is the z-score

A: Given that 2.5% of the highest area present in the data. That is, P(Z>z)=2.5%=0.025…

Q: The predicted college GPA for a high school GPA of 3.8 and a college board score of 500 is (Round to…

A: The equation of the college GPA is y^=0.16+0.51x1+0.002x2. The variable x1 is defined as the high…

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

A: Solution:From the given information, the proportion of African American is 0.13, random sample of…

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: What percentage of the blocks are red?

A:

Q: The seniors in my math classes were asked about whether they would pay for either a senior trip or a…

A: The question is about categorical data analysis Given :   To test : A senior trip is more popular…

Q: if you answer 36 problems correctly on a 42 question test what percentage of the problems did you…

A: if you answer 36 problems correctly on a 42 question test what percentage of the problems did you…

Q: the highest data of 50 leaves is 150mm and the lowest is 118m the desired class size is 9

A: Given  N=50 Highest value=150  Lowest value=118  Class size=9

Q: If the proportion of Heads is .25 out of 200 flips, what is the p-value? Round to three places.

A: Given : The proportion of Heads is .25 out of 200 flips.

Q: A survey of 1104 adults nationwide asked, what irks you most about the actions of other motorists?…

A: Percentage is the ratio of people responded tailgators to the total people surved.

Q: In a pharmaceutical company, the proportion of injection bottles found defective were 0.2, 0.1, 0.8,…

A:

Q: A random sample of students was surveyed and asked to list their grade level and whether or not they…

A:

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

A: Sample size is 30. There are 6 students are vegetarians. The hypotheses are given below: Null…

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: In Ghana, all patients surviving a stroke are supposed to have their cholesterol levels measured…

A: (i) The hypotheses are; Null hypothesis: There is no association between an individual sex and the…

Q: If the proportion of Hs is .45 out of 50 flips, what is the p-value? Round to three places.

A: We have given that Sample proportion =0.45 Sample size (n)=50 flips  Population proportion p=0.5…

Q: If the proportion of Hs is .25 out of 200 flips, what is the p-value? Round

A: Here proportion of head in fair coin should be 0.5 So take hypothesis with proportion p is 0.5 or…

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

A:

Q: A study published in 1990 attempted to estimate the proportion of Florida residents who were willing…

A: Population:   It is nothing but the set of all items that are required for the specific study is…

Q: Find the percentage of scores of the following

A: Given,μ=0s=1

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.