In a study with lower quartile 100, upper quartile 140 and median as 130 How many people can have values ​​above 140? (B) How much of the population has values ​​above 100? (C) How much of the population has values ​​between 130 and 140?

Q: After 8 points are added to each score in a sample, the mean is found to be M = 40. What was the…

A: Let us have n number of scores in a sample. After adding 8 to each score sample mean will be M = 40…

Q: Which value is greater than at most 75% of all scores in a data set?

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

Q: How did you come to the conclusion for the relative frequencies numbers being 0.5, 0.10, etc?

A:

Q: If we add a constant (say, d) for all data values, how this will affect the geometric mean? and what…

A:

Q: (b) On a test, each student is given a grade of A, B, C, D, or F. Which measure tells the grade…

A: A set of data can be studied by using tools like Mean, Median and Mode. Mean gives the sum total of…

Q: On five exams, Rachel has a mean score of 80 points. Her lowest score was 50.  If this score is…

A:

Q: What percentage of scores would be above 567?

A:

Q: If there were NO drivers who drove 80 or 85 mph would the mean stay the same, be lower,, or higher?

A: From the given information we find the probability.

Q: Suppose there are 5 students in a room. The mean age is 20.0 years, and the median age is 19. If the…

A: From the provided information, There are 5 students in a room. The mean age is 20.0 Years. The…

Q: Suppose there are 30 students in a class. the18 male students in the class have a mean score of 72,…

A:

Q: Social network news In 2012, Pew Research noted that34% of young adults age 18 to 24 got some news…

A: It is given that difference in proportion is not significant.

Q: The mean earning of men in Florida differs significantly from the mean earning of men in Texas. If…

A: Sample sizesn1 is 123 and n2 is 88.

Q: What is the frequency corresponding to a score of 8

A: We have given a hisogram in the question and we have to find the out the frequency against the score…

Q: A data set is described as consisting of n = 15 scores. Based on the notation being used, the data…

A: We have the following statement .

Q: student scored in the 75th percentile on the SAT. What does that mean?

A:

Q: A student scored between 81% and 93% on all exams except for one that she failed with a 47% because…

A: Mean & Median : The mean of the data set is calculated by adding all observations in the data…

Q: Ten students take a 10-point test. The mean score is 8. Could the median be 10? Could the median be…

A: Solution-: Ten students take a 10-point test. The mean score is 8. Could the median be 10? Could the…

Q: The mean IQ is 100 and the standard deviation is 15. What percentage of people fall between the IQs…

A: given  data, μ=100σ=15we have to find out the percentage of people

Q: How are the smoking habits of students related to their parents’ smoking habits? Here are the data…

A: H0 : There is no association between parent smoking and student smoking H1 : There is an association…

Q: find the mean if Z-score =14, st.Dev.=2.5, for a score of 8.5

A: Standard normal distribution:The standard normal distribution is a special case of normal…

Q: In a psychology class, 53 students have a mean score of 84.7 on a test. Then 24 more students take…

A: Given Information No of students n1 = 53 Mean score µ1 = 84.7 24 more students have taken the test…

Q: . The result of an English exam show a mean score of 55 and a standard deviation of 6. What percent…

A:

Q: A sample consists of n = 16 scores. How many of the scores are used to calculate the range?

A:

Q: If the mean of a data set is 22 and the SD is 5, what % of the values fall between 12 and 27? Give a…

A: given that  mean of a data set is 22

Q: The mean score of 7 students on a short test is 7 out of 10. If six of the seven students scored 9,…

A: The mean score of 7 students on a short test is 7 out of 10 . If six of the seven students scored…

Q: Sixty-three college men were asked what they thought was their ideal weight. A five-number summary…

A: 1st Quartile = 155 Median = 176

Q: A group of 20 students obtained a mean score of 70 on an examination. The second group of 30…

A: From the question, the required information is given below:

Q: Of the 328 patients that completed the survey last year, 211 of them claimed to be returning…

A: The question is asking to identify the type of data that the question 'How long did you wait past…

Q: A paper describes an investigation in which 40 men and 40 women with online dating profiles agreed…

A: Confidence interval is used to determine the range where the true value of the parameter lies. It…

Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

A:

Q: What is the relationship between a person's height and their weight in a sample of 1000 individuals?

A: A linear regression analysis was performed on the data, which showed a strong positive correlation…

Q: In a psychology class, 40 students have a mean score of 89.5 on a test. Then 24 more students take…

A: Given,n1=40 , x¯1=89.5n2=24 , x¯2=78.3

Q: You are testing the claim that the proportion of men who own cats is smaller than the proportion of…

A: Given information, n1=90 and p1=0.80 n2=110 and p2=0.70 Consider, the pooled proportion,…

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.