According to IDC, 70% of smartphones in the world use Google’s Android operating system in the fourth quarter of 2012. Answer the following questions based on a random sample of 14 smartphone users.  d. What are the mean and standard deviation for this distribution?

Q: 1) Which sample will have the larger mean number of books read? 2) Which sample will have the larger…

A: The given histogram is:

Q: The ages (in years) of a random sample of shoppers at a gaming store are given below: 12 2 23 15 20…

A: Let us define X as the given observations. X: 12, 21, 23, 15, 20, 16, 19, 17, 14, 16. Consider,…

Q: In estimating the population mean with the population standard deviation unknown, if the sample size…

A: Given that, Population standard deviation is unknown and sample size (n) = 27

Q: Find the Mean, Variance, and Standard Deviation (round off to two decimal places)

A: Given: No. of students, n=50 Scores of students 78 95 91 78 91 83 80 99 93 91…

Q: What

A: Explanation and solutions is given below....

Q: Find the mean and standard deviation for the numbers of sleepwalkers in groups of five.

A: Given: X P(x) 0 0.175 1 0.357 2 0.318 3 0.118 4 0.028 5 0.004

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

A:

Q: Find the sample standard deviation. Round to the nearest tenth.   22 29 21 24 27 28 25 36

A: By using the given information, we have Data set = { 22 ,29, 21, 24 ,27, 28 ,25 ,36 } Total number…

Q: Twenty-nine percent of adult Internet users have purchased products or services online. For a random…

A: It is given that 29% of the users purchase online. Therefore, probability of a randomly selected…

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: A pharmaceutical company claims that a drug is effective in treating 90% of people having severe…

A: It is given that the random variable follows a binomial distribution with n=6 and p=0.9.

Q: On a normal distribution, four participants obtained the following deviation scores: -5,0,+3,+1.…

A: Given deviation scores of four participants from a normal distribution. The mean for the deviation…

Q: Use the following data obtained from ages of the last six U. S. Presidents at the time of their…

A: Mean: The mean is the sum of observations divided by the number of observations. that is, Mean = x =…

Q: In a distribution exactly normal, 7% of the items are under 35 and 89% are under 63. What are the…

A:

Q: Twenty-five percent of commercial airline accidents are caused by bad weather. If 300 commercial…

A: The mean of the binomial random variable obtained by the formula μ=np, where (n) is the number of…

Q: Calculate SS, variance, and standard deviation for the following sample of scores: 15, 16, 9, 1, 9

A: let us consider x = scores   scores ( x- x¯ ) ( x-x¯ )2 15 5 25 16 6 36 9 -1 1 1 -9 81…

Q: A pharmaceutical company claims that a drug is effective in treating 90% of people having severe mig…

A: Given information: The percentage of people having severe migraine headaches is 90%. That is, p=0.90…

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: (a) How many reams should the manager expect to use each day? (b) What is the standard deviation of…

A: here given Discrete probability Distribution of X  X=  no of reams of paper Used

Q: Given a distribution with a mean of 90 and a standard deviation of 10, what is the probability of…

A: Given Information: μ=90 σ=10 x1=85 x2=110

Q: A standardized memory test has a mean of μ=100 and a standard deviation of σ = 10. Answer the…

A: (c )   Obtain the scores that separate the middle 28%. The scores that separate the middle 28% is…

Q: In a normal distribution, about what percent of the data lies within one, two, and three standard…

A: We have to determine the percentage between (mean - SD, mean + SD), (mean - 2SD, mean + 2SD) and…

Q: A recent CNN News survey reported that 76% of adults think the U.S. pennies should still be made.…

A: (a)   Determine the expected value.   The expected value is obtained below as follows:   Let X…

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: The number of people standing in the line to vote at the last Presidential Election at 7:00 P.M. was…

A: In statistics, three measures of central tendency are widely used. These three measures are also…

Q: The iPhone battery capacity is normally distributed with a mean of 4 years and a standard deviation…

A: Note: “Since you have posted a question with multiple sub-parts, we will solve first three subparts…

Q: According to the IRS, the average refund in the 2011 tax year was $3,109. Assuming that the standard…

A: Given information- Sample size (n) = 50 Population Mean µ = $3,109 Standard deviation (σ) = $874

Q: On a normal distribution, four participants obtained the following deviation scores: –5, 0, +3, and…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: For each pair of data sets, which is likely to have the greater standard deviation? 40. heights of…

A: The standard deviation is a measure of variation or dispersion of a set of values. This means how…

Q: Assume the sample standard deviation is s=10, what do you conclude?

A: here given, sample mean = 87 n = 25 sample standard deviation  = 10

Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are the z-scores for the…

A: Consider that the sample mean and standard deviation of a random variable x are x̄ and s,…

Q: Calculate the mean, standard deviation, and z score of the following values: 7, 5, 8, 10, 9, 6, 7…

A: Following are the explanation of the question.

Q: The weights, in pounds, of a group of dogs are:          18, 31, 22, 46, 55, 28.    Calculate the…

A: Given Data The weight of a group of dogs are: 18,31,22,46,55,28   The size of group is N=6   The…

Q: Six different rain gauges on campus recorded the following precipitations during the month of…

A: Here, x x-x (x-x)2 8.4 -1.63 2.6569 9.8 -0.23 0.0529 11.1 1.07 1.1449 4.6 -5.43 29.4849…

Q: Find the Mean and Standard Deviation for the prompts below: 3.) State Farm Insurance Company…

A:

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

A:

Q: Consider the following data: 10,6,1,2,8,9 Calculate the value of the sample standard deviation.…

A:

Q: high school students across the nation compete in a financial capability challenge each year by…

A: It is given that, the students who score in the top 13 percent are recognized publicly for their…

Q: What percentage of a population typically lands within two standard deviations of the mean under a…

A:

Q: Find Quartile Deviation for the following data. 10, 13, 9, 6, 4, 9, 18, 8, 7, 5, 14

A:

Q: Calculate the standard deviation for the data set below 1, 3, 4. 5, 6, 9, 12, 16

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: When comparing two​ populations, the larger the standard​ deviation, the more dispersion the…

A: Note: Thank you for the question. Since only the statement is given, we have considered it as a true…

Q: Find the range, MAD, variance, and standard deviation of the following grouped data?

A: The objective is to find range ,MAD, variance,SD. of given grouped data

Q: i. What are the mean and standard deviation of the total amount of milk and flour in Jim's…

A: Here Take  Random variable  X= no of Cup of Flour in single recipe Y=no of cup of Milk in Single…

Q: calculate the standard  deviation for the following data set   2  4   3    7    2   roundup to 2…

A: A mean of a data set is the average value of the data. The mean of a dataset is computed by dividing…

Q: Determine the point estimate, p and the sample standard deviation, S5.

A: here n = 439 x= 162 here x= no of students working full time while going to school

Q: Find the sample standard deviation for the following scores: x = 2,45,2,6,3,2,9,10,11,34,64

A: The random variable is x. The sample size is 11. It is given that, the sample size of 11…

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: Assuming the sample mean and standard deviation are indicative of the class as a whole, in what…

A:

Q: Convert the following raw scores to z-scores if the mean is 50 and the standard deviation is 10. a.…

A: We convert the given raw scores to z - scores when the mean is 50 and the standard deviation is 10.