On a certain exam, Tony corrected 10 papers and found the mean for his group to be 75. Alice corrected the remaining 20 papers and found that the mean for her group was 80. What is the mean of the combined group of students? (Round your answer to one decimal place.)

Q: A set of n = 6 scores has a mean of M = 10. Another set of scores has n = 4 and M = 15. If these two…

A: The combined mean can be calculated as, Xc = n1 x1 +n2 x2 n1+n2 Were, n1 is the sample size for the…

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

A: Given Information:   Mean test score Number of ninth graders Glenwood 78 258 Central 96 303…

Q: the average(arithmetic mean) of g and 100 is 75, what is the value

A: It is given that, the average of g and 100 is 75. we have to find the value of g+100=?

Q: The mean of a sample is 40. What will the mean become if a) 9 points are added to each score? b) 18…

A:

Q: Find the mean from its definition. That is, find the sum of the six observations and divide by 6.The…

A: Note:Thank you for the question. We have considered the given values as the observations in the data…

Q: One sample with n = 4 scores has a mean of M = 12, and a second sample with n = 6 scores has a mean…

A:

Q: For a 10 point quiz, the professor recorded the following scores for 8 students: 7, 8, 3, 9, 10, 6,…

A: From the above data The correct option of mean is  7.0

Q: A set of n = 6 scores has a mean of M = 10. Another set of scores has n = 4 and M = 20. If these two…

A: Given, First set has mean = 10 and n =6 Second set has mean = 20 and n =4

Q: For the following group of numbers calculate the mean, median, and mode. 1, 4, 4, 9, 6, 5 Mean =…

A: Mean mode and median

Q: If H, is false, the true or actual mean is equal the hypothesized mean, µ = Ho O True O False

A: We have given that the statement is about to the null hypothesis.   Note: According to Bartleby…

Q: Suppose that 50 measurements were taken and the mean was calculated to be 4.55.  Assume next that…

A: Solution: From the given information, mean of 50 measurements is 4.55.

Q: After 5 points are added to each score in a sample, the mean is found to be M=45 . What was the…

A: Given data: c = 5 points are added to each score in a sample. New mean, M = 45 Let the original mean…

Q: The mean and SD calculated from 20 items are 15 and 10 respectively. If an additional observation 36…

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Q: There are 15 numbers on a list, and the mean is 25. The smallest number on the list is changed from…

A:

Q: . A population has a mean of μ = 40. a. If 5 points were added to every score, what would be the…

A: Given that population mean is given by 40

Q: Akiko surveyed several friends, asking them how many siblings they had. Use this data to find the…

A:

Q: The mean score of a girl in 3 tests is 68. What should her mean score in 2 remaining tests be in…

A:

Q: Which of the following best discribes the relationship between the computed mean and the actual…

A: The actual mean is 47.1 miles per hour and the computed mean is 46.8 miles per hour.

Q: Which of the following descriptions refers to ‘Median’?

A: Median is the middle value which divide the data into two equal parts.

Q: Forty students took a final exam on which the passing score was 70. The mean score of those who…

A: Given that, forty students took a final exam on which the passing score was 70. The mean score of…

Q: One section of stats students (n = 48) scored a mean of X= 82 on their Quiz 1. A second section of…

A:

Q: The mean score on a set of 15 tests is 75. Suppose two more students take the test and score 68 and…

A:

Q: There are26 numbers on a list, and the mean is 25. The smallest number on the list is changed from…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: he margin of error for a 90% CI for a mean, when the sample size is 12, the sample average is 52,…

A: As the population standard deviation is known, we will use t distribution. Degrees of freedom =…

Q: The average ( arithmetic mean) of 6,19, and x is 19. What is the value of x?

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Q: The Taylors have recorded their weekly grocery expenses for the past 16 weeks and determined that…

A:

Q: There are 15 numbers on a list, and the smallest number is changed from 12.9 to 1.29. a) Is it…

A: a. Suppose the mean of the n = 15 numbers, when the smallest observation was 12.9, be x̄. Thus, the…

Q: A market researcher at a major clothing company that has traditionally relied on catalog​ mail-order…

A: Introduction :-  We have to explain in this context what the 7% represents in the given context.

Q: The mean purchase total is $93.80 and the median purchase total is $75.80. The store manager…

A:

Q: In a 100- item test, the score of Student C is 1/2 SD above the mean. Mean is 50 and SD is 4.8. What…

A: 13. The mean is 50 and standard deviation is 4.8.

Q: If the mean depth Of a lake is 1.4m, it means that.........

A: it simply mean

Q: (a) If the standard error of the mean is 10 for N = 12, what is the standard error of the mean for N…

A: The standard error of the sampling distribution of the sample means is given as follows:

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

A: Given:  The number of students and mean scores for the three schools are:                  School 1…

Q: Enter the ordered set of data from the stem n leaf plot above in a TI-84 list, and then find the…

A: To find the mean and median using the Ti-83 calculator the step by step procedure is as below: Open…

Q: Find the mean of the following data. 19, 22, 20, 16, 25, 23, 17, 18 O None of these O 28 O 22 O 20

A:

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

A: Given Information: High school Mean score on test Number of ninth graders Glenwood 77 279…

Q: The following table shows the number of people and their ages in years: 72 65 33 32 2. 25 ages 4 3…

A: Yes, the mean and median both are misleading as the frequency of the ages is more for lower ages as…

Q: answer this with solution:   The mean monthly salary of 26 male employees is 35,500 while that of…

A:

Q: For the month of April a checking account has a balance of $564 for 23 days, &2466 for 3 days, and…

A:

Q: In a survey, 18 people were asked how mue roughly bell-shaped with a mean of $30.2 would spend on…

A:

Q: Based on the following data set: 150, 180,210,220,250,325 What would be the change to the mean,…

A: Use EXCEL Procedure to obtain the values of mean, median and mode for the original data set.…

Q: A group of 7 students was asked. "How many hours did you watch television last week?" Here are their…

A: From the provided information, The data values are as follow: 14, 12, 9, 5, 5, 11, 6 Number of…

Q: During an experiment, the following times (in seconds) were recorded. Find the mean. 6.3, 5.4, 6,…

A: The given data is: 6.3, 5.4, 6, 3.2, 5.4, 5.5 To find the mean.

Q: The​ account's mean daily balance for April is approximately $___

A: Answer: Given, For the month of​ April, a checking account has a balance of ​$563 for 25 days, $2498…

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

A: From the given information, It has been given that,

Q: A pollster wants to know the average income of those who supported John McCain for president. He…

A: Here the sample data is collected and the mean is calculated from it. Hence we have calculated the…

Q: Q2. The 30% trimmed mean of the following data (120, 150, 170, 177, 178, 181, 198, 250, 450, 955)…

A: Trimmed Mean : Trimmed mean is the value calculated by omitting the specified % of largest values…

Q: One sample has a mean of M=5 and a second sample has a mean of M=10. The two samples are combined…

A: Given that, sample 1 has mean = 5 and sample 2 has mean =10.

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.