The hourly pay of a sample of nurses is approximately normal with a mean of $36.25 and a standard deviation of $3.75. Approximately what percent of the nurses make: a. More than $43.75? b. Less than $47.50?

Q: Given a sample data set with a Standard Deviation of 1.4, what is the Variance of the data set.?…

A: The given value of sample standard deviation is, s = 1.4 Using the standard deviation, the formula…

Q: On a scale designed to measure attitudes toward immigration, two college classes scored as follows.…

A: Question 8: Class A: The value of mean for class A is, Mean=∑ixiN=4+6+2+1+1+16=156=2.5 Thus, the…

Q: Given that the mean of a data set is 20, and the standard deviation of this data set is 8, then what…

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

Q: If a set of data has a mean of 12 and a standard deviation of 3, what is the z-score for a value of…

A:

Q: The annual commissions per salesperson employed by a retailer of mobile communication devices…

A: From the provided information, Mean (µ) = $43600 Standard deviation (σ) = $4600

Q: Match the histograms on the right to the summary statistics given. Standard Mean Median Deviation 50…

A: Clearly form the Histograms, we can conclude that I - a II - b III - c IV - d

Q: In a normally distributed data set with a mean of 24 and a standard deviation of 4.2, what…

A:

Q: For Problem 19.39 , determine the probability (assuming normal distribution) that a tire could be…

A: Here, x f fx x-x (x-x)2 f(x-x)2 30000 15 450000 -12661.9 160322951.9 2404844278 35000 20…

Q: A trucking company determined that the distance traveled per truck per year is normally distributed,…

A: Here, mean is 60 thousand and standard deviation is 10 thousand. a. The proportion of trucks can be…

Q: Match the histograms on the right to the summary statistics given. 20- Standard Deviation Мean…

A: For the given histogram the right to the summary statistics given

Q: Given the following frequency distribution, determine the standard deviation. Scores Frequency 51-60…

A:

Q: What is the standard deviation for the following sample of scores? Scores: 3,2,4,6,6,3

A: The standard deviation is a measure of dispersion. It tells how much data are deviates from their…

Q: Calculate the sample standard deviation of the data shown. Round to two 17 22 25 15 19 13 24 sample…

A:

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

A:

Q: (a) Determine the mean and the standard deviation for each data set.

A:

Q: The systolic blood pressure of 18-year-old women is a roughly bell-shaped distribution with a mean…

A: We have given that.   X~N( μ , ?^2 )   μ =120 , ? =12   Z-score =( x - μ )/?

Q: a. If PO1 Dela Cruz's waist girth is 32, how many standard deviations away is he from the mean? b.…

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

Q: According to a government study, among adults in the 25- to 34-year age group, the mean amount spent…

A: Given : The mean amount spent per year on reading and entertainment is $1,994. Assume that the…

Q: During I week, an overnight delivery company found that the weights of its parcels were normally…

A: 1. a. The percent of the parcels weighed between 12 oz and 30 oz is obtained below: It is given that…

Q: The annual commissilons per salesperson employed by a retailer of mobile communication devices…

A: Let X be the random variable from normal distribution with mean (μ) = $ 41200 ans standard deviation…

Q: Which of the below data sets has the lowest standard deviation? You do not need to calculate the…

A: The standard deviation is used to calculate the variability of the data set. It tells us that how to…

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

A:

Q: 9) In a class of 30 students, how many students failed the test (below 64), if the mean grade on a…

A:

Q: A line for tickets to a broadway show had a mean waiting time of 20 minutes with a statistic…

A: Given: Mean,  μ=20 Standard deviation, σ=5 Sample size, n= 200 Use normal approximation here, the…

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: Given that the variance for a data set 1.20, what is the standard deviation?

A: The standard deviation is calculated by taking the square root of variance. Variance is given as…

Q: The ages of employees in a certain company were bell-shaped with mean 28 and standard deviation 5.…

A:

Q: Find the Median of the data set Compute the Standard deviation. (i)

A: To find the median we have to arrange the data set first.  That is: 15   17   18   19   20   31   33…

Q: Given a sample data set with a Standard Deviation of 1.34, what is the Variance of the data set.?…

A: We have to find variance.

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

A:

Q: If a distribution of test scores is normal, with a mean of 78 and a standard deviation of 11, what…

A: Let X be a test score. Then, X ~N(78,112). Then, X~N(78,112)⇒Z=X-7811~N(0,1) a.) P[ Test score is…

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

A:

Q: In a statistics class of 150 students, the mean and standard deviation of scores was 70 and 5,…

A: Given: The total number of students are N=150. The mean scores of students in a statistics class is…

Q: With the extra data value,  the range, standard deviation, and variance is?

A: Given data: 3.31 2.79 2.83 1.97 1.69 2.54 2.46 3.44 3.93 1.59 2.86 1.61 2.57 4.02 2.49 2.42…

Q: The scores of students on an exam are normally distributed with a mean of 468 and a standard…

A:

Q: For a sample of 120 businesses, the average profit they generate in a month is $54,000 with a…

A:

Q: The time spent by a teacher at work during spring holidays is normally distributed with a mean of 20…

A: Given that.   X~N( μ , ?^2 )   μ=20     , ?=5   Z-score =( x - μ )/?

Q: The percentage of observations that are contained within 3 standard deviations of the mean is O a.…

A: As per the empirical rule for normal distribution, 68%, 95%, and 99.7% of the values lie within one,…

Q: examination. Scores on the GMAT are roughly normally distributed with a mean of 527 and a standard…

A: Given data,μ=527σ=112P(X>437)=?

Q: In the given graph, What is the mean and standard deviation?

A:

Q: If data set A has a larger standard deviation than data set B, data set A is more spread out than…

A:

Q: If the mean speed for a major league fast ball is 90 miles per hour and the standard deviation is 5…

A: Given Information: Mean = 90  Standard deviation = 5 Standardized score for a pitch that is 97 miles…

Q: Which of the following data would be most appropriate to report standard deviation ? scores of an…

A: Standard deviation- Standard deviation is a measure of dispersion. It is a quantity that expresses…

Q: Given that the mean of a set of data is 25 and the standard deviation is 3, what is the coefficient…

A: Given: Mean = 25 Standard deviation = 3

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

A:

Q: Consider the data of a businessman that accumulates the daily sales of his restaurant business…

A: Given : 18,500     23,600      21,210      14,515      20,500 21,700     14,250     18,345…

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.