A poll of 2816 U.S. adults found that 1522 U.S. adults, or 54.048% regularly used Facebook as a news source. Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 90% level of confidence. Express all answers as percentages rounded to 2 decimal places. Do not write the percent sign. Margin of Error (as a percentage): 1.65 Confidence Interval: 52.40 Margin of Error (as a percentage): 1.96 Confidence Interval: 51.85 X% to 55.70 Now find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 95% level of confidence. Margin of Error (as a percentage): 2.58 Confidence Interval: 50.47 x% to 56.22 X Finally, find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 99% level of confidence." to 57.61 x% X

Q: What dot plot has a median of 5, a range of 10, and a mean of 5?

A: Explanation: Consider the data set is: 0, 5, 10 n = 3 Mean = 0+5+103= 153= 5 Median = n+12thterm=…

Q: Based on the values of the mean and the median, decide whether the data set is skewed right, skewed…

A: Solution-:Given: Based on the values of the mean and the median decide whether the data set is…

Q: If you are told only that you scored in the 80th percentile, do you know from that description…

A: p-th percentile means that there are p% of the values are less than that value. Here, you scored in…

Q: Molly earned a score of 940 on a national achievement test. The mean test score was 850 with a…

A:

Q: Find the range of the following data points: 100.1, 97, 77, 68, 123.4, 23.5, 214, 156, 214.2, 211,…

A:

Q: Many athletes (and their parents) worry about the risk of concussions when playing sports. A…

A: First let us sort the head circumferences (in inches) for the players on the team; No. Head…

Q: What's the median of 10.2,12.6,20.4, and 13.6 to 3 decimal places

A: It is an important part of statistics. It is widely used.

Q: Complete the following statement. If you are asked to find the 85th percentile, you are being asked…

A: If you are asked to find the 85th percentile, you are being asked to find

Q: n a survey of 18 year old males, the mean weight was 160.5 pounds with a standard deviation of 46.4…

A: GIVEN DATA, μ=160.5σ=46.4we have to find out the percentile for the given data

Q: Find the percent of 16/20 and 4/20. What are the relationships between the answers?

A:

Q: pediatrician wants to determine the relation that may exist between a​ child's height and head…

A:

Q: Find the Mean, Median, Mode, and Standard Deviation of the data set. ((150, 105, 114, 124, 135, 150,…

A:

Q: You take a medical test and the doctor tells you that your wellness z-score is 1.86. What percent of…

A: Let X be a random variable from standard normal distribution with mean = 0 and standard deviation =…

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: Your instructor has the Mid-Term examination grades. He told you that the 25th percentile is 51 and…

A: Given that, Your instructor has the Mid-Term examination grades. He told you that the 25th…

Q: The test score at the 25th percentile is 108. What is the test score at the 75th percentile?

A: Solution

Q: q11- Median is which percentile of the data? Select one: a. 25th. b. 50th. c. 75th. d. 80t

A: b. 50th

Q: State whether the mean, median, or mode is being used in the given statement.  The grade received…

A: Given statement : The grade received by the greatest number of students.

Q: What is the p value if the mean is 98.6, n=7, t= -2.114?

A: The P-value is the probability that provides strong evidence in favor of the alternative hypothesis.…

Q: A pediatrician wants to determine the relation that may exist between a child's height and head…

A: Formula : Se =√(SSE/(n-1))

Q: The weight of a division I college football player has a mean of 255lb and a standard deviation of…

A:

Q: Identify the​ t-statistic and P-value.

A: The sample size n is 23.

Q: The measure of skewness for a certain distribution is lower and upper quartiles are 44.1 and 56.6…

A: Solution:

Q: There were 34 females that weighed over 250 pounds. What percent of females aged 20 to 29 weighed…

A: Given data,  N~(161.61,48.95)  i.e., μ=161.61σ=48.95   If n=34 P(X>250)=?

Q: the mean of a collection of data is located at the.          of a distribution of data

A: Mean can be defined in a number line as a balance point where there is a balanced distribution of…

Q: If a person’s z score equals 2.08, what is their percentile?

A: Given info: The person’s z score equals 2.08.

Q: Find the standard score and the percentile for a data value 0.6 standard deviations above the mean.…

A: As per the question we have In standard normal distribution Mean µ = 0 Standard deviation σ = 1 0.6…

Q: Scores on an exam were normally distributed. Ten percent of the scores were below 64 and 80% were…

A: Introduction: Consider X as a normally distributed random variable, with mean μ and standard…

Q: You recorded the time in seconds it took for 8 participants to solve a puzzle. The times were:…

A: (1)   Obtain the value of mean.   Use EXCEL Procedure to obtain the value of mean   Follow the…

Q: Forty percent of players scored 8 points or Sixty percent of players scored 8 points or more - less…

A: Given that,The 40th percentile for points scored per player in a game is 8.That is,P40 = 8

Q: elow are the summary statistics calculated from the heights of students on a university campus. 25%…

A: It is given that the first quartile is 58.

Q: Today, all boats in the Harbor Tour Fishing Company caught a total of six salmon with weights as…

A: Here 6 salmons weights are 16,23,18,31,14,19 pounds Arrange weight im accending order…

Q: Determine whether the following statement is true or false. If it is false, rewrite it as a true…

A: The mean is the average of the observations.

Q: Eric scored 107 on the IQ test. What is his exact percentile rank? M=100    s=15

A: Given, Mean, M=100 Standard deviation, S =15