the average score of 10 students is 85. what will be the mean if another student will take the test and score 20

Q: a. A student performance in certain exam was 10/100, later he got a 98/100, discuss which is better…

A: Range is better than mean to reflect his performance because the mean of the two scores will not…

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

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Q: The mean of 14 numbers is 47.  Removing one of the numbers causes the mean to decrease to 43. What…

A: Given that Number of observations N = 14 Mean = 47

Q: find the mean for the number of correct answers

A: A multiple choice test with 17 questions, each question has four possible answers, one of which is…

Q: After six biology test, Ruben has a mean score of 77. What score does Ruben need on the next test to…

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Q: The temperature for the last 5 days were: 75⁰F, 66⁰F, 80⁰F, 68⁰F and 73⁰F. What was the mean…

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Q: The mean weight of 32 math students is 42.6 kg. If the students could all stand on the scale…

A: Given that ; The mean weight of 32 math students is 42.6 kg. If the students could all stand on the…

Q: If your score on your next statistics test is converted to a z score, which of these z scores would…

A: Given that  The Z-score are -2.50, -1.50, 0, 1.00, 2.25

Q: The reported CORONAVIRUS cases was 1200 in Oman on MARCH, 2021. It was expected to raise to around…

A: The cases were 1200 expected to rise to 1800  ,the cases actually rose to 2500  Expected value is…

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

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Q: Yesterday Al recorded 5 data values, and the mean of those values was 90. Today he realized the data…

A: Given dataMean of 5 data values = 90Data value 80 was actually 50Mean is given by

Q: Kevin scored at the 70th percentile on a test given to 9940 students. How many students scored lower…

A: Given Kavin got 70 percentile. Total students are 9940.

Q: If the aggreat is 30 and the mean is 10. How many sets of numbers are used

A: According to the provided information, The aggregate is 30 and the mean is 10

Q: The mean of 200 items was 50. Later on it was found that two items were wrongly taken as 92 and 8…

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Q: Kevin scored at the 60th percentile on a test given to 9920 students. How many students scored lower…

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Q: Kevin scored at the 60th percentile on a test given to 9780 students. How many students scored lower…

A: Given that the percentile of Kevin is 60.This means 60% of the students will have score lower than…

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: What are the percentages of scores that fall between -1 and 0/0 and 1

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

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Q: The mean score of 10 students of an algebra class was 85. When two new students enrolled, the mean…

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Q: What percentage of scores are between scores 75 and 89?

A: By emperical rule  P(-1<Z<1)= 0.68 P(-2<Z<2)=0.95 P(-3<Z<3)= 0.

Q: on a multiple choice test with 20 questions, each question has 4 possible answers, one of which is…

A: We have to find mean  for students who guess at all  correct answers..

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

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Q: Rene scored at the 84th percentile on a test given to a 12600 students . How many students scored…

A: Given percentile of Rene=84

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: After six biology tests, Ruben has a mean score of 74. What score does Ruben need on the next test…

A: The mean score of Ruben after six biology tests is 74.

Q: What number was removed?

A: This is a basic application of average . Average forms a firm backbone of high school mathematics .

Q: Bob scored at the 65th percentile on a test given to 9960 students. How many students scored lower…

A: x = no. of data value less than x  * 100/total no. of data values

Q: researchers calculated for their study that the mean difference () = 5.65 and the SE of the Mean…

A: Solution: From the given information, the mean difference is 5.65 and the SE of the mean difference…

Q: To get a grade of C + , a student must have a mean average of 77 or greater. Jim has a mean average…

A: Jim has mean average of 76 for 10 quizzes. i.e. Jim has scored total of 76×10=760, combining all 10…

Q: The mean of five numbers is 5. If one of the five numbers is removed, the mean becomes 6. What is…

A: The mean of five numbers is 5.So total of those 5 numbers = 5*5= 25

Q: If the mean of five values is 8.8 and four of the values are 6, 7, 6 and 12, find the fifth value.

A: Given: The mean of five values is 8.8  The four values are 6, 7, 6 and 12 Consider, the fifth value…

Q: Eugene must take four exams in a geography class. If his scores on the first three exams are 91, 67,…

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Q: The mean salary for 24 factory workers is ₱12 000. How much will one additional salary of ₱37 000…

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Q: After six biology tests, Ruben has a mean score of 78. What score does Ruben need on the next test…

A: Note that, the required mean is 80. The total number of tests after the next test is 7.

Q: After six biology tests, Ruben has a mean score of 75. What score does Ruben need on the next test…

A: Let 'x' denote the score Ruben need to score on the next, i.e. seventh test so that his average…

Q: The mean daily wage for 9 construction workers is ₱400. How much will one additional daily wage of…

A: Given that The mean daily wage for 9 construction workers is ₱400.  We have to find How much will…

Q: The mean of 10 numbers is 8. If an eleventh number is now included in the results, the mean becomes…

A: Given,The mean of 10 numbers=8Let the 11th number be X.

Q: Find the mean of these values assuming the first five values are each worth 10% and the last value…

A: We have the data set: 2, 6, 10, 14, 20, 32 We need to calculate the mean of these values assuming…

Q: The mean score on a test is 75, the median score is 80, and the mode score is 85.  Pat got an 82.…

A: Given: The mean score on a test is 75, the median score is 80, and the mode score is 85.

Q: Suppose you have information about average heights of a random sample of airplane passengers. The…

A: Form the given information, The mode is 70 inches, the median is 68 inches, and the mean is 71…

Q: The mean of 10 numbers is 49. Removing one of the numbers causes the mean to decrease to 45. What…

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Q: Keith has scored 99, 69, 58, 93, and 75 on his previous five tests. What score does he need on his…

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Q: If the mean of 5 values equals 34, then ΣΧ-

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Q: Rene scored at the 84th percentile on a test given to 12,600 students. How many students scored…

A: Given Rene scored at the 84th percentile a test given to 12,600 students.   How many students scored…

Q: After six biology tests, Ruben has a mean score of 72. What score does Ruben need on the next test…

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Q: What is the value of ΣX for the scores 2, 5, 3?

A: Given data2,5, 3ΣX = 2+5+3 = 10

Q: ter six biology tests, Ruben has a mean score of 73. What score does Ruben need on the next test to…

A: Given data,After six biology tests, Ruben has a mean score of 73Which means∑x6=73∑x=438What score…

Q: On a multiple choice test with 9 questions, each question has four possible answers, one of which is…

A: It is given that there are 9 questions and each question having four possible, one of which is…