Going to work: A news report stated that the mean distance that commuters in the United States travel each way to work is 14 miles. Assume the standard deviation is 9 miles. A sample of 80 commuters is chosen.

Q: Online courses: A sample of 260 students who were taking online courses were asked to describe their…

A: Given: Sample size(n) = 260 Sample mean x¯    =5.41 Sample standard deviation (s) = 0.89 Confidence…

Q: . About what percent of x values lie between the first and third standard deviations (both sides)?…

A:

Q: Internet Viewing A researcher wishes to estimate the average number of minutes per day a person…

A:

Q: (a) Find the mean for this sample and explain what it represents. (b) Find the standard deviation…

A: here as per guidelines i have calculated 3 subparts plz repost for remaining  here given , . One…

Q: The Graduate Management Admission Test (GMAT) is taken by individuals interested in pursuing…

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

Q: Microwave Popcorn. For a given brand of microwave popcorn, what property is desirable for the…

A: When the standard deviation of cooking time is small then most of the kernels are popped about the…

Q: ACT The ACT test is used to assess readiness for college. In a recent year, the mean ACT score was…

A: Given DataMean µ= 21.1Standard Deviation σ= 5.1ACT scores are considered significantly low if its…

Q: Which average - mean, median, or mode - is associated with the standard deviation? A. mean B.…

A: We have to find Which average - mean, median, or mode - is associated with the standard deviation

Q: Check your blood pressure: In a recent study, the Centers for Disease Control and Prevention…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Gabriel and Lucia took a road trip across the country. The room costs, in dollars, for their…

A: Here AS PER GUIDELINES I have calculated first main question  Here calculated mean and standard…

Q: Watch help video When Ian commutes to work, the amount of time it takes him to arrive is normally…

A: Given: Population Mean (\mu)(μ) = 5959 Population Standard Deviation (\sigma)(σ) = 33

Q: top 19 percent are

A: Given that  High school students across the nation complete in a financial capability challenge each…

Q: What raw score does he need to get the certificate

A: Given that Mean = 83 And SD = 3.2

Q: Use technology or Z score table to answer the question the weights of logs in a wood pile are…

A: Use technology or Z score table to answer the question the weights of logs in a wood pile are…

Q: The Graduate Management Admission Test (GMAT) is a standardized exam used by many universities as…

A: Solution According to the empirical rule,

Q: Allegiant Airlines charges a mean base fare of $89. In addition, the airline charges for making a…

A:

Q: Check your blood pressure: In a recent study, the Centers for Disease Control and Prevention…

A: Solution The given data is Mean=80.9 Standard deviation=10.3

Q: Placement exams An incoming freshman took hercollege’s placement exams in French and mathematics.In…

A: In French exam, the freshman scored 82 and in Math exam she scored 86. The mean score for French is…

Q: Statisticians use what symbol for the standard deviation?

A: In general, statisticians use the symbol (A) s for the standard deviation.

Q: What is the mean and standard deviation?

A:

Q: What does this symbol represent? standard deviation mean of the mean of the sample standard…

A: Standard deviation of sample mean is denoted by symbol σx¯ Mean of the sample means is denoted by…

Q: The Department of Commerce is researching the level of income in boroughs A and B and has obtained…

A: Descriptive statistics can be used for explanatory data analysis purposes. It will give a basic…

Q: how do you find standard deviation? how many bars should you have for a standard deviation? do you…

A: Introduction:The standard deviation of a set of observations is the square root of the average of…

Q: Emily's chicken ranch has 9 hens.  The number of eggs that each has laid in the past week follows:…

A: Measure of central tendency measures the central or average value of a dataset. Measured of…

Q: A machine used to fill​ gallon-sized paint cans is regulated so that the amount of paint dispensed…

A: It was stated that a machine used to fill​ gallon-sized paint cans is regulated so that the amount…

Q: Calculate the mean if -2 standard deviation = 70 and +2 standard deviation = 100. The mean of the…

A:

Q: A commuter travels many miles to work each morning. She has timed this trip 5 times during the last…

A:

Q: A nursery sells trees of different types and heights. These trees average 50 inches in height with a…

A: From the provided information, Mean (µ) = 50 Standard deviation (σ) = 14

Q: 12. It is the square of the population standard deviation. Answer:

A: ( 12 ) It is the square of the population standard deviation .

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: It is given that the mean and standard deviation are 6.8 and 0.8, respectively.

Q: Find the mean: Find the median: Find the sample standard deviation:

A:

Q: The Graduate Management Admission Test (GMAT) is a standardized exam used by many universities as…

A:

Q: The amount of corn yield is normally distributed with a mean of 186.7 bushels of corn per acre, with…

A: Given : The amount of corn yield is normally distributed with a mean of 186.7 bushels of corn per…

Q: Annual Precipitation (Inches) Stem Leaf 0 6 1 9. 2| 127 3 356 434 5 036 6. 68

A: From Given stem and leaf  plotThe data values…

Q: A student studying statistics wants to look at data for his favorite sport, American football. He…

A: It is given that that a student collect data on the lengths of 100 field goals from various games…

Q: Many people now turn to the internet to get information on health-related topics. A research article…

A: Given: Wikipedia: Mean = 26.5, Standard deviation = 14.5, n1 = 40 WebMD : Mean = 43.5, Standard…

Q: Diastolic blood pressure. In a study of 500 men, diastolic blood pressure was found to be…

A: Solution: Let X be the diastolic blood pressure. From the given information, X follows normal…

Q: Babies: According to a recent report, a sample of 300 one-year-old baby boys in the United States…

A: Explanation:in this  the answer is should  In step2 the clearly writed

Q: Average heart rate for pacific islanders is 72 beats/minute. A group of 25 individuals participated…

A: Given Information: Average heart rate μ0=72 beats/min (Hypothesized value) Sample size (n) = 25…

Q: What is the standard error?

A: Let , X→N(μ=28000 , σ=7200) , N=20000 , n=64 By using central limit theorem , The sampling…

Q: How does a nonzero constant number c change a standard deviation problem?

A: Standard deviation is independent of change of origin but it affects by the change of scale.

Q: Microwave Popcorn. For a given brand of microwave popcorn, what property is desirable for the…

A: When the standard deviation of cooking time is small then most of the kernels are popped about the…

Q: A nursery sells trees of different types and heights. These trees average 40 inches in height with a…

A: Given: μ=40σ=12n=80 The standard deviation for sample mean is obtained as below:…

Q: Find the mean and standard deviation for the individualized instruction scores. Scores…

A: Answer -             Calculate Mean and standard deviation from the following grouped data…

Q: The Graduate Management Admission Test (GMAT) is taken by individuals interested in pursuing…

A: a) Computation of test statistic value: Sample size is greater than 30 and the population standard…

Q: Biology A biologist found the wingspans of a group of monary butterflies to be normally distributed…

A: Given Data: Let X represent the random variable Mean=52.2 SD=2.3   X~ Normal (52.2, 2.32)