nat is the mean value of the following scores: 1.25, 1.83, 2.03, 2.52, 3.75, 2.12, 3.48 2.52 2.12 2.43

Q: According to the below table calculate the weighted mean. Row Number of Students Row Average 82.3…

A: Given information- We have given a table of the number of students and their row average. We have…

Q: 71 67 67 72 76 72 73 68 72 72

A: Data:-71 67 67 72 76 72 73 68 72 72Sample size n =10

Q: If instead of 25, 80 male runners are selected for the study, what is the sampling error at 95%…

A: It is given that Sample size n = 80 Sample mean M = 53 Population SD = 5.5 Margin of error E = 0.8…

Q: A software company is interested in improving customer satisfaction rate from the 69% currently…

A: Given Hypothesized pop. proportion, p0=0.69Favorable cases,x=146Sample size,n=193Sample…

Q: Can you give the statistical table you have used to get the 1.96? Thank you.

A: Given that, The confidence level is, 0.95 The level  of significance is,

Q: Use the following data set to answer the questions. 13 15 20 20 20 20 20 20 20 23 27 31 a. What is…

A:

Q: The mean score on this test is: The median score on this test is:

A: Calculate Mean and Median from the following grouped data:- X Frequency 3 1 4 3 5 2 6 1…

Q: Find the sample standard deviation.

A: Given that:n= 12  Sample size

Q: much does the mean score tell you about the performance of the whole class?

A: Averages are tools of summarizing data, it facilitates the comparison. Different averages are…

Q: Given the following data, the middle 20% is between the scores ___ and ___. The value of Q1 is ___.…

A: 66, 69, 70, 73, 73, 76, 77, 78, 79, 82, 86, 87

Q: The weight of eight boys are 87 kg, 99 kg, 83 kg, 90 kg, 98 kg, 45 kg, 70 kg and 103 kg. Find the…

A: We have find givan weight..

Q: A software company is interested in improving customer satisfaction rate from the 60% currently…

A:

Q: What z-score separates the most extreme 5% of the distribution from the middle 95% of the…

A: here we know that 5% of the distribution from the middle 95% of the distribution. a- 1.96 is the…

Q: The mean and median of a distribution are 14 and 15 respectively. The value of mode is

A:

Q: Find the sample standard deviation. The top five scores on last semesters midterms were 90 97 100 90…

A: The question is about measures Given : Data - 90, 97, 100, 90, 93   To find : Sample std. deviation

Q: The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 3…

A:

Q: Which of the following z scores are above the mean? Choose all that apply.     0     1.35…

A: For normal distribution, the mean is equal to 0

Q: ean and Mode are Given as 30 and 15, respectively. Value of Median is -(a) 25 (b) 26 (c) 24.5 (d)…

A: Given Mean = 30 Mode = 15

Q: The time it takes for an airline to get the luggage to the airport baggage carousel after a flight…

A: Let X: The time takes for the luggage to reach the airport baggage carousel.X has a uniform…

Q: For the test described in Scenario A, 32 apartments were measured and the sample mean found to be…

A: Given that  Sample size n =32 Sample mean =1237 Standard deviation =45

Q: Calculate the mean (all the three types) from the following data and comment on your solutions.…

A: Mean is the measure of central tendency. There are three types of mean. They are arithmetic mean,…

Q: For a distribution, bowley's coefficient of skewness is -0.53 Q₁ 16.7 and median = 24.3 what is the…

A:

Q: Test the claim that mean price of a cup of coffee is not equal to $3.59 using a 5 % significance le…

A: From the given information, The claim of the situation is mean price of a cup of coffee is not equal…

Q: Which of the following is the appropriate null and alternative hypotheses for the test described in…

A:

Q: The weights (in pounds) of three adult males are 160, 215, and 195. The standard error of the mean…

A: The weights of adult males are 160, 215 and 195.

Q: Christine is currently taking college astronomy. The instructor often gives quizzes. On the past…

A: Given that the data 95 , 69 , 128 , 78 , 64 , 53 , 79 .

Q: If you were looking for the 50th percentile in a data set, which of the following should you not be…

A: Since we know that the mean is defined as  Mean = Sum of observation / number of observation And…

Q: Convert the following data to z scores to determine who scored above, below, and at the mean in this…

A: The mean of the sample is obtained below:From the given information, 40 observations of samples were…

Q: Statistics which describe the dispersion of scores around a typical score are measures of: Select…

A: Dispersion is the statistical measure of spread of data.Deviation is the difference between an…

Q: - -: 14 Calculate the mean diviation (from mean) from the following data: 60-70 Marks :0-10 10-20…

A:

Q: he scores on a test for a sample of 38 statistics students are summarized in the following table.…

A: students score(x) no. of students(f) fx 90 9 810 80 16 1280 70 13 910   n = 38 ∑fx = 3000…

Q: In your statistics class, your grade is calculated using weighted mean. The exams count for 35% of…

A: The weightage of exams and corresponding values of Grades (in percentage) are given.

Q: A person’s phone bills for the last three months were $20, $75, and $55, respectively. What was the…

A: Given n=3

Q: Their body fat percentage scores were 20.3, 29.6, 32.4, 35.7, 28.4, 21.4, 26.6, 30.5, 23.4, 11.8,…

A: 1 Percentile: Obtain the percentile rank of the person whose body fat percentage is 35.3%. The…

Q: The test scores of students on 3 points a linguistics course are the following: 80,78,75,68,90. find…

A: we have to find the mean for given data..