The mean marks scored by 6 students in a database exam is 54.4. If a student who got 66 is also included then the new mean will be

Q: Two groups of students reported mean weights of 162 kgs and 148 kgs respectively. When would the…

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Q: The U.S. Center for Disease Control reports that in year 1900, the mean life expectancy is 47.6…

A: Given  nw=117, x¯w=46.7 and  sw=11.4 And           nnw=86, x¯nw=38.4 and  snw=15.4

Q: The gestation period for human births can be taken as normally distributed with a mean of 256 days…

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Q: Then the mean number (to the nearest whole number) of students who will finish the exam in less than…

A: The distribution function is defined as F(x) = P(X ≤ x) Let p be the probability that a student…

Q: Assume a researcher recruits 150 African American and Caucasian individuals taking warfarin to…

A: Given: n1 = 75 X1 = 6.1 S1 = 1.7 n2 = 75 X2 = 4.3 S2 = 0.9 Sp = 1.10 Formula Used: Sp =…

Q: The number of consumers purchasing a particular item on a given day is found to be uniform over the…

A: Let X denotes the number of consumers purchasing a particular item on a given day and it follows…

Q: The manager of Carrefour selected samples of 64 customers and computed the sample average amounts…

A: Given: Sample size, n = 64          If the average amount spent is normally distributed then we are…

Q: snip

A: Let z' be the required z-value. z' is such that…

Q: Suppose that the number of hours that an adult watches in a day has a mean of 2.4 hours and a…

A: Given: Mean, μ=2.4 hours Standard deviation, σ=0.7 hours (i) Percentage of adults watch between 1…

Q: A researcher found that a 95% confidence interval for the mean hours per week spent studying by…

A: The 95% confidence interval is given by (13,17)

Q: The mean is cosidered to be the "balance point" for a distribution becuase exactly half of the…

A: The mean is considered to be the "balance point" for a distribution because exactly half of the…

Q: A person must score in the upper 2% of the population on an IQ test to qualify for membership in…

A: From the given information, consider X be a random variable denoting score in an IQ test for…

Q: uppose you have a data set of size of 26 with mean 50 and standard deviation 8. If u subtract 8 from…

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Q: Suppose that the national mean weight for a three-year-old girl is 35 pounds with a SD of 3 pounds.…

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Q: The mean age of a group of teachers representing a school at a conference is 40 years old. If the…

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Q: Assume a researcher recruits 150 African American and Caucasian individuals taking warfarin to…

A: Given values are,  Sample size n1=75  sample size n2=75 sample mean x1=6.1 sample mean x2=4.3 sample…

Q: The distribution of the top 1% of individual incomes in the US is strongly skewed to the right. In…

A: Answer: $330,000 is the median and $675,000 is the mean.

Q: Suppose the average golfer drives the ball around 259.1 yards with a standard deviation of 9.73.…

A: Solution

Q: A population with µ = 58  and σ = 12 is transformed into z-scores.  After the transformation, what…

A: It is given that a population with mean is 58 and the standard deviation 12.

Q: Suppose that iQ scores have a bell shaped distribution with a mean of 103 and a standard devation of…

A: Given: μ=103 and σ=13.   Now, to find where the lowest 32% of IQ scores lie:PZ<z=0.32 Look for…

Q: If the highest paid soccer platyer has his salary doubled, which of these will change? Can you…

A: We have to find correct options which will change.

Q: 1 point to a​ D, and 0 points to an F. What is the GPA of a student who gets an A in a 3​-credit…

A: The data of the score of the student will be: credit score   grade(point)   number of course 3…

Q: The mean number of hours per day spent watching television, according to a national survey, is 3.5…

A: From the provided information, Mean (µ) = 3.5 Standard deviation (σ) = 2

Q: A cosmetics company fills its best-selling 8-ounce jars of facial cream by an automatic dispensing…

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Q: It is believed that the mean number of chronic conditions amongst the elderly is 1.75. A physician…

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Q: The mean score on this test is: The midrange of scores on this test is:

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Q: The mean for the number of pets owned per household was 2.1. A poll of 1023 households conducted…

A: If the given sample size is more than 30 then that is a large sample test. z test comes under a…

Q: For a group of 100 candidates the mean and standard deviation of their marks were found to be 60 and…

A: 1] n=100 2] X¯=603] Standrd deviation σ=154] σ2=225

Q: If the variance of a national accounting examination is 900, how large a sample is needed to…

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Q: The mean marks of 100 students were found to be 40. Later on it was discovered that a score of 53…

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Q: Suppose that the daily viewing time is normally distributed with a mean of is 8.35 hours and a…

A: Determine the number of hours of television viewing must a household have in order to be in the top…

Q: The mean age of a group of 100 persons was found to be 32.02. Later, it was discovered that age 57…

A: given solution: incorrect sum of ages = 32.02*100 = 3202 27 + sum of ages of rest 99 students= 3202…

Q: The mean of 15 items was found to be 45. On rechecking, it was found that two items were wrongly…

A: Given: Wrong mean = 45 Number of observations = 15 Incorrect values = 12, 18 Correct values = 32, 28

Q: if an average score of exams was 74 points for 24 students  the 25th student got 64 points whats…

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Q: a population has mean score of 50 if five points are added to each score what is the new mean

A: GivenThe population mean = 50Mean is the average of all the data points in the data distribution. It…

Q: Dr. Xyz claims that the average salary of workers in Jones is P35,000. A random sample of 100…

A: Given: Mean to be tested, μ=35000Sample size, n=100Sample mean, x¯=40000

Q: The first four deviations from the mean in a sample of n = 5 reaction times were .3, .9, 1.0, and…

A: It is given that, n=5 and  First four deviations from the mean for reaction time is 0.3,0.9,1.0,1.3…

Q: It is believed that the mean number of chronic conditions amongst the elderly is 1.75. A physician…

A: Introduction: Parameter: A parameter is a population characteristic of interest in a statistical…

Q: A consultant for a large university studied the number of hours per week freshmen watch TV versus…

A: Let μ1 denotes the mean number of hours per week freshmen wash TV, and μ2 denotes the mean number of…

Q: If 10 men in a company have an average annual salary of GH¢360,000 and 23 women have an average…

A: The mean is the sum of a collection of numbers divided by the count of numbers in the collection. 10…

Q: Suppose the midterm exam score for 100 students at UPC had a mean of 70 and a standard deviation of…

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Q: The average score of all pro golfers for a particular course has a mean of 70 and a standard…

A: It is given that, The average score of all pro golfers for a particular course has a mean of 70 and…

Q: Assume a researcher recruits 150 African American and Caucasian individuals taking warfarin to…

A: WHen 2 samples, 2 means, and 2 standard deviations are given, then we test for equality of means of…

Q: The Agency for Health- Care Pesearch and Quality reported that 53% of people who had Coronary bypass…

A: From the provided information, 53% of people had coronary bypass surgery in a recent year were over…

Q: Create a set of three numbers with a mean of 5 and a standard deviation of 5.

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Q: The mean marks of 100 students were found to be 40. Later on it was discovered that a score of 53…

A: Given,sample size(n)=100mean(x¯)=40wrong value=83correct value=53

Q: For a frequency distribution of marks in Statistics for 100 students, the arithmetic average was…

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Q: Should we conclude (for this second study) that the mean birthweight of children is higher (at level…

A: Given that there are 100 pairs of women. degrees of freedom: df=n-1=100-1=99 Test statistic:…