Suppose we have a distribution of the number of "friends" all users of a popular social media site have. What measure of spread would be best to describe this data? A)  spread should be described with the IQR because the distribution will be symmetric. B)  The spread should be described with the IQR because the distribution will be skewed to the right. C)  The spread should be described with the standard deviation because the distribution will be symmetric. D)  The spread should be described with the standard deviation because the distribution will be skewed to the right.

Q: Suppose that the quarterly sales levels among the health care information systems companies are…

A: Given that the mean of 8 million dollars and a standard deviation of 1.2 million dollars.  μ=8σ=1.2…

Q: The heights of adult men in America are normally distributed, with a mean of 69.7 inches and a…

A:

Q: The election results were announced in a country. The number of seats in state Mozi had a mean of…

A:

Q: What percentage of students from this school earn scores that satisfy the admission requirement?…

A: It is given thatMean, μ = 1490Standard deviation, σ = 296Z-Score, Z = ( X - μ )/σwhere, Z be the…

Q: The distribution of college computer science students' scores on a fifth grade programming exam…

A:

Q: 3. A survey among freshman at a certain university revealed that the number of hours spent studying…

A: Given : μ=25σ=7X~N(μ=75,σ2=(7)2) We want to find, proportion of students studied less than 30 hours.

Q: Section 1. IQ tests supposedly measure our intelligence. They typically are 'normed' so that they…

A: We have given that  Mean = 100 Standard deviation = 15

Q: When data is normally distributed the mean equals the median True False

A: Normal distribution

Q: Judy's doctor is concerned that she may suffer from hypokalemia (low potassium in the blood). There…

A: a) The random variable X is defines as the potassium level which follows normal distribution with…

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: The studernt scored the same on both tests. O B. The student scored better on the mathematics test.…

A: Given : For geography test student score, x = 68.0 population mean, μ = 80.0…

Q: Marine biologist at Nova Southeastern University spent three months on a research expedition tagging…

A: The given information is: For females,  Sample sizen1=142 Sample meanx¯1=68.3 Sample standard…

Q: lecture(12.5):  The mean of the population is 50. The standard deviation is 10. If a person row…

A:

Q: It seems these days that college graduates who are employed full-time work more than 40 -hour weeks.…

A: From the provided information, Population mean (µ) = 40 hours Sample size (n) = 19 Sample mean (x̅)…

Q: Both data sets have a mean of 195. One has a standard deviation of 16, and the other has a standard…

A: Given the box plot of data sets A and B, we use the key: 15|8=158. And also given that both data…

Q: Suppose that the quarterly sales levels among health care information systems companies are…

A: given data normal distribution μ = 12σ = 1.2

Q: Suppose​ 18% of​ movie-goers say that horror is their favorite movie genre. If a random sample of…

A: Obtain the mean number of movie-goers that prefer horror movie genre. The mean number of movie-goers…

Q: It seems these days that college graduates who are employed full-time work more than 40 -hour…

A: Given information- Population mean, μ = 40 Sample size, n = 19 Sample mean, x-bar = 44 Sample…

Q: If there is a large amount of variation, then on average, the data values will be far from the mean.…

A: The given statement is 'If there is a large amount of variation, then on average, the data values…

Q: For admission to graduate school, Kira is taking the physics subject-matter test, and Donna is…

A: Given information- For Physics- Population mean, µ = 605 Population standard deviation, σ = 34 And…

Q: Exhibit 6-5 The weight of items produced by a machine is normally distributed with a mean of 8…

A: Given that  Mean = 8 Standard deviation = 2 Find P(X = 8 )

Q: The results of a common standardized test used in psychology research is designed so that the…

A: Consider X be a random variable which follows normal distribution indicating the score earned on a…

Q: If the mean of the number of sales of houses is fifty-six, and the standard deviation is thirty-six,…

A: We have given, The mean number of sales of houses is x¯=56. And the standard deviation is σ=36.

Q: A company is doing a hypothesis test on the variation in quality from two suppliers. Both…

A: supplier 1:first sample = n1 = 34standard deviation from of quality from supplier 1 is…

Q: Human body temperatures in degrees Fahrenheit have a distribution that assumed to be symmetric and…

A: given data  normal distribution μ = 98.6σ = 0.9 hypothermic : bottom 1 % fever : top 1.5%

Q: In a distribution plot, if the mean is equal to the median, is the possible shape of the…

A: Given that, In a distribution plot, Mean is equal to the Median

Q: Entry to a certain university is determined by a national test. The scores on this test are normally…

A:

Q: If the mean of 7 observations is 5 , and the deviations of these observations about their mean are :…

A: We have to find median of data.

Q: Give two situations in which comparing two population standard deviations would be important

A: Two situations in which comparing two population standard deviations would be important is obtained…

Q: Statistics that describe the dispersion among scores in a distribution are measures of a. statistic.…

A: It is needed to define the statistics that describe the dispersion among scores in a distribution.

Q: A student scores 80 in math which has a mean of 70 and standard deviation of 10. He also scores 85…

A: GivenStudent scores 80 in math with Mean(μ)=70standard deviation(σ)=10student scores 85 in english…

Q: It seems these days that college graduates who are employed full-time work more than 40-hour weeks.…

A: We have to test claim.

Q: 2). What is the major problem with using the Range as the measure of variability?

A: Range is measure of variability

Q: Admission to a certain university is determined by an entry exam. The scores of this test are…

A: Obtain the score in the top 30% will be offered admission. The score in the top 30% will be offered…

Q: A local firm reported that an American family of four washes an average of 2000 pounds of clothes…

A:

Q: In Australia, young people aged 18 to 29 have an average of 394 Facebook friends. This population…

A: The average number of Facebook friends, young people have is 394.The population distribution is…

Q: Suppose that the quarterly sales levels among healthcare information systems companies are…

A:

Q: It seems these days that college graduates who are employed full-time work more than 40-hour weeks.…

A: The independent variable is respondents. The dependent variable is the number of hours worked per…

Q: The length of songs in the Big Hair playlist of a Statistics professor's mp3 player varies from song…

A: a) The probability that the next song to be played is between 3.9 and 4.85 minutes long is 0.5321.b)…

Q: A different investor decides to invest $8000 in Fund A and $3000 in Fund B. Assuming the amounts…

A: Here's how to proceed:### 1. Investment DetailsYou've mentioned investments of $8000 in Fund A and…