Nationally, the per capita monthly fuel oil bill is $110. A random sample of 36 cities in the Southeast average $78, with a standard deviation of $4. Is the difference significant? Summarize your conclusions in a sentence or two.

Q: In a multiple-choice examination in Chemistry, students Mae and Julie received scores of 82 and 65,…

A: We have given that.   X~N( μ , ?^2 )   μ = , ? =   Z-score =( x - μ )/?

Q: If the average American male is 5'10" and the standard deviation is 3", then LaBron James who is…

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Q: For the 2017 romantic comedy film, The Last Jedi, 300,000 IMDB viewer ratings show a mean of 7.2…

A: The known values are, The value of k is,

Q: Find the number of boys and the combined standard deviation

A: Given :  Our aim is to find the number of boys and combined standard deviation.

Q: The operation manager at a tire manufacturing company believes the mean mileage of a tire is

A:

Q: On a math exam, Joel had a score o 90, which was exactly 2 standard deviations above the mean. The…

A: Since, we only do up to three sub parts of a problem, we'll be doing the first three sub parts only.…

Q: On a nationwide math test, the mean was 51 and the standard deviation was 4. If Roberto scored 70,…

A:

Q: On a nationwide math test, the mean was 60 and the standard deviation was 7. If Roberto scored 90,…

A:

Q: The mean for a data set is 75, the standard deviation is 4, and the z score is -0.19, what is the…

A: We have given that,  From the normal distribution with mean (mu) = 75 and standard deviation (sigma)…

Q: If you have 100 people in your sample, what would be the degrees of freedom you use to calculate the…

A: Given, n=100 Degree of freedom(df)=?

Q: what if the standard deviation was 30, instead of 60

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Q: On a nationwide math test, the mean was 57 and the standard deviation was 10. If Roberto scored 80,…

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Q: can you find the mean and standard deviation?

A: Let the male data set is denoted by x, then the mean is given by the formula x¯=∑xxn. Where, the…

Q: video game c

A: given, sample size(n) = 1500 sample mean (x̄) = 115 sample stadard deviation (s) = 11

Q: A data set has a mean of 60.4 and a standard deviation of 5.2    Is a value of 45 unusual? Is a…

A: From the provided information, Mean (µ) = 60.4 Standard deviation (σ) = 5.2 X~N (60.4, 5.2)

Q: Mary Bartel, an auditor for a large credit card company, knows that, on average, the monthly balance…

A: The standard deviation is 56. Mary audits 50 accounts. That is n=50

Q: According to Dietary Goals for the United States (1977), high sodium intake may be related to…

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Q: The operation manager at a tire manufacturing company believes that the mean mileage of a tire is…

A: The sampling distribution of sample mean follows the normal distribution, if the population is…

Q: The Good-Guys Car Dealership has tracked the number of used cars sold at its downtown dealership.…

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Q: The Virginia Cooperative Extension reports that the mean weight of yearling Angus steers is 1152…

A: Here mean = 1152 and SD = 84. z=(x-mean)/SD = (x-1152)/84

Q: If the range of a data set is 56, find the approximate value of the standard deviation, using the…

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Q: A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from…

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Q: In a study of Ridge View's boys' basketball team, the average height is 68 inches and standard…

A: Given, mean =μ=68Standard deviation = 4x = 78

Q: What is the difference between what the z score measures and what the standard deviation measure?

A: z score is standard score and the formula for finding z score is,

Q: An incoming freshman took her college’s placement exams in French and mathematics. In French, she…

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Q: With a sample of 62, a population mean of 29, and a standard deviation of 9, what is the standard…

A: Givensample size(n)=62population mean(μ)=29standard deviation(σ)=9

Q: The population standard deviation for the height of high school basketball players is three inches.…

A: Solution: 6. From the given information, confidence level is 0.95, σ=3 inches and E=1.

Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90,…

A: Given that, Mean = 72 Standard deviation = 7

Q: The weight of a division I college football player has a mean of 255lb and a standard deviation of…

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Q: What is the difference in meaning between the Standard Error of the Mean and and the Standard…

A: In statistics, a sample mean differs from the population's real mean; this difference is known as…

Q: If you score 76 on a commercial pilot exam that has a mean score of 70 and a standard deviation of…

A: We have to find given percentile ....

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: From the provided information, X 0 1 2 3 4 5 P(x) 0.169 0.363 0.306…

Q: On a nationwide math test, the mean was 57 and the standard deviation was 4. If Roberto scored 90,…

A: Formula for z-score is

Q: what is the mean and standard deviation?

A:

Q: In a survey, 35 people were asked how much they spent on their child's last birthday gift. The…

A: Confidence interval is a concept closely related to interval estimation. Confidence interval is…

Q: On the past mathematics test, the bottom 20% of students failed to pass the test. The mean for the…

A: The mean of the data is μ=55 and the standard deviation is σ=11 It is also given that 20% of…

Q: What is the standard deviation?

A: We have to calculate the SD for the given frequency distribution.

Q: Explain the standard deviation?

A: Standard deviation: Both the standard deviation and the variance are based on how much each…

Q: A successful basketball player has a height of 6 feet 77​inches, or 201201 cm. Based on statistics…

A: Given information- Height of a player = 201 cm Z-score = 3.743 We know that standard height is given…

Q: In a survey of women in Canada, the mean height was 65 inches with a standard deviation of 3 inches.…

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Q: Refer to the accompanying​ table, which describes the number of adults in groups of five who…

A: Mean :-  ∈x = ∑  ×. Px                           ∈x =…

Q: Which would you expect to be the larger standard deviation: the standard deviation of the weights of…

A: Consider,  the standard deviation of the weights of 25 students in a first-grade class, or the…

Q: Find the median and the standard deviation of the scaled marks of all the students.

A: According to the answering guidelines,  we can answer only one question and the rest can be…

Q: A successful basketball player has a height of 6 feet 11 ​inches, or 211 cm. Based on statistics…

A:

Q: In a multiple-choice examination in Chemistry, students Mikasa and Jean received scores of 82 and…

A: Given problem Given that   In a multiple-choice examination in Chemistry, students Mikasa and Jean…

Q: According to Chebyshev's Rule, at least what percent of observations must be within 2.5 standard…

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Q: Find the standard deviation for this data set. if a one goal hockey game was added to this data set,…

A: From the plot representing the number of goals scored per game, there are three games in which three…

Q: What is the sample mean? What is the standard deviation?

A: Use EXCEL Procedure for finding the value of sample mean.   Follow the instruction to obtain the…

Q: In a study of Ridge View's boys' basketball team, the average height is 68 inches and standard…

A: Given that, In a study of Ridge view's boys' basketball team, the average height is 68 inches and…

Q: What is the Standard Deviation?

A: You want to know about standard deviation.We will deeply understand the meaning of standard…