The mean number of five numbers is 30. If one number is excluded, the mean gets reduced by 3. Find the excluded number? а. 108 b. None of these answers. С. 42 d. 150

Q: The mean of 5 observations was 27. One number is deleted then the new mean is 25. Find that numb

A: The mean is the average or the most common value in a collection of numbers.

Q: The mean work week for engineers in a start-up company is believed to be about 62 hours. A newly…

A: From the given information, the number of observations is 8.

Q: what is the mean of both 40,200 and 41,750

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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: A population with a mean of µ= 8 has EX=40. How many scores are in the population

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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: 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: A quiz consists of 30 true or false questions if the student guesses on each question what is the…

A: According to the provided information, n=30 Since the questions are true or false type questions.…

Q: shes to determine if there is any difference between the two brands in the mean lifetime of the…

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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: Yesterday, the price of a can of beans at five supermarkets was $2.02, $2.11, $1.99, $2.32, and…

A: Measure of central tendency measures the central or average value of a dataset. Mean is a widely…

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

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Q: SRS of 25 commuters to the Washington DC re selected, and each is asked how far they ommute to work…

A: Given data,n=25The sample mean x=39Sample sd     s=6Construct 90% CI?

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: 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: If number of observations are an even number, median is a. (N+1)/2 th Item b. (N-1)/2th Item C.…

A: If there is an even number of observations, then add the two middles values and divide by 2. The…

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: On a certain exam, Tony corrected 10 papers and found the mean for his group to be 75. Alice…

A: Given: Tony corrected 10 papers and mean for his group is 75 and Alice corrected the remaining 20…

Q: Given the mean of a certain data set as 155, what will be its new mean if all the data points were…

A: Remark: We know that, The mean (average) of a data set is found by adding all numbers in the data…

Q: Given x = 0, 1, 2, 3, 4, 5 how is the mean 1.5? Shouldn't the mean of x be 2.5?

A: Measures of Central Tendency: A measure of central tendency represents the central value or typical…

Q: The mean number of a set of 5 numbers is 12.7 . What extra number must be added to bring the mean up…

A: We know that,  Mean = (summation Xi)/n If Mean of 5 numbers = 12.7 then 12.7= (X1+X2+X3+X4+X5)/5…

Q: 50, the mean number of partners reported was 1.049 (sd=1.89). Is it reasonable that the mean number…

A: here sample size  = 3636         sample mean  = 1.049         sample standard deviation = 1.89 here…

Q: The 5 players on the basketball team have a mean height of 141 cm. The heights of 4 of the players…

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Q: Given that the mean number of centuries scored per player is 1.95, find the value of k.

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Q: Suppose that the mean score of 28 students (in a class of 30 students) in a quiz is 28. What should…

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Q: 47 Find out Ginni's mean difference from the following items :- 22, 24, 26, 28, 30.

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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: How many scores 2. between 96 and 106?

A: HERE GIVEN , mean µ = 86 and σ= 10. HERE USE NORMAL DISTRIBUTION BECAUSE POPULATION IS LARGE ENOUGH…

Q: Find the mean of a student's test scores if e earned 93, 91, 85, 90, and 91 points on five ests. 89…

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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: 9. Find the mean of a student's test scores if he earned 93, 91, 85, 90, and 91 points on five…

A: Given data is 93, 91, 85, 90, 91sample size(n)=5

Q: Determine the test score of John in Statistics if he has a z-score of 1.89. (SD = 4, mean = 82)

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Q: If the mean of a set of scores is 12 and a new set is created by multiplying each score by 3, what…

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Q: Vrite a set of 6 unique numbers that is skewed to the left and has a mean of 6 and a median of 8.

A: Solution

Q: 7. Find the mean of a student's test scores if he earned 95, 93, 85, 90, and 91 points on five…

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Q: µ = 9 has Σ X = 54. How many scores are in the populatio

A: Given that   A population with mean (μ) = 9 Summation of data values  Σ X = 54   We know that Mean =…

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

A:

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: Which of the following would be an unacceptable level for a Type 2 error in a study?     .80…

A: We have to choose Which of the following would be an unacceptable level for a Type 2 error in a…

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.

Q: If the mean of 16, 11, 17, 10, a, 10, 13, 17, 9, and 16| is 13.1, then what's their median? Select…

A: Given Data: Mean=13.1 Mean=16+11+17+10+a+10+13+17+9+161013.1×10=119+aa=12

Q: The mean of 15 items was found to be 30. On rechecking, it was found that, two items were wrongly…

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Q: Suppose you go to the grocery store and spend $61.85 for the purchase of 14 items. What is the mean…

A: 6. The mean is the average value of the data set and is computed by summing up all the observations…

Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.