4.) Determine the range and standard deviation of 60, 58, 62, 67, 48, 51, 72, 70
Q: 1) choose four numbers with the smallest possible standard deviation. You may use the same number…
A: It is an important part of statistics. It is widely used.
Q: not round until the final answer. Then round to the nearest hundredth as needed.)
A: Let X be the score from normal distribution with mean (μ) = 50 and standard deviation (σ) = 9 and X…
Q: A set of data items is normally distributed with a mean of 90 and a standard deviation of 4 Convert…
A: Solution
Q: a) Find a point estimate for the difference in average starting salaries for graduate economists and…
A: here given for Graduate Economist n1 = 80 x¯ = 48100 σ1 = 7200 (as mention in part b considered…
Q: Twenty-five fast-food restaurant hourly employees were surveyed to see how many hours they worked…
A: Given Information: Sample size n=25 Population standard deviation σ=5 Confidence level = 98% = 0.98…
Q: 14. x: 471.7 659.3 740.5 790.5 781.3 1047.3 969.5…
A: The given table is, x 471.7 659.3 740.5 790.5 781.3 1047.3…
Q: Consider the data set of twelve numbers between 1 and 10 {1, 1, 2, 2, 2, 3, 4, 4, 5, 6, 8, 10 }. The…
A:
Q: 9 25. The mean and standard deviation of a set of 100 observations were worked out as 40 and 5…
A:
Q: Give me the standard deviations for each of these data sets. 1.…
A: Given information- We have given the data sets we have to find the standard deviations.
Q: 9. A sample of 25 observations has a standard deviation of 5. The sum of the squared deviations for…
A: The sum of the deviations from the mean is always equal to zero because the sum of the deviations…
Q: Consider the following set 22.6 - 23.0 - 21.5 - 21.9 - 22.1 Calculate the (a) mean; (b) standard…
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: A delivery company's trucks occasionally get parking tickets, and based on past experience, the…
A: Given , Mean = μ = 1.4 Standard deviation = σ = 0.5 Sample size = n = 18
Q: 31.The National Center for Health Statistics reports that the mean systolic blood pressure for males…
A: As the population standard deviation is not known, we will use the z test. As it is required to test…
Q: Professor Pascal has 184 students in his college mathematics lecture class. The scores on the first…
A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…
Q: The standard deviation of the set {18, 23, 14, 3, 17} is: 1. 6.66 2. 14.2 3. 18.6 4. More than one…
A: To calculate the standard deviation of a set of numbers, you can follow these steps:Find the mean…
Q: * 6-11. Calculate the standard deviation of the following observations on a certain variahi. 240-17,…
A:
Q: 5. A bell-shaped population data has mean of 16 and standard deviation of 7, then 99.7% of the data…
A:
Q: The ages (in years) of the 5 employees at a particular computer store are the following. 23, 21,…
A:
Q: What would be the standard error of the difference between the sample averages of the lifetimes of…
A: For factory A, SD = 300, sample size = 100 For factort B, SD = 150, sample size = 100
Q: Determine whether the statement is parts a) and b) are true or false. Explain your answer in words,…
A:
Q: 6) A DC-10 shuttle flight between Atlanta and Dallas has a total seating of 312, a mean of 286…
A:
Q: What does it mean if the standard deviation of a given score is high? a) the scores are very low…
A: We know that, For the normal distribution, Z =( X- μ) /σ We can say that, if the standard…
Q: Suppose that an electrical engineering firm in Ottav tions. One thousand undergraduate students…
A: to get the job he needs to be in the top 7% therefore we need to find the value of the 93th…
Q: 1) Suppose that 1,000 students took a Math examination wherein the maximum score that they can…
A: We assume that the score of the 1000 students is normally distributed with mean 70 and standard…
Q: 7. A sample of 5 monthly sales figures (in thousands of dollars are 10, 6, 5, 10, 9. Calculate the…
A: 7. From the given information, the data values are 10, 6, 5, 10 and 9. The sample mean is obtained…
Q: What's the standard deviation for this? There's 4 trials and the Kc values are.. 1.) 111.095 2.)…
A: given mean x¯= 125.7502xc2/3 values are∝ -111.095, 139.250 , 130.436, 122.55variance = (1/N-1)*…
Q: 15. x: 471.7 659.3 740.5 790.5 781.3 1047.3 969.5…
A: 15. The regression analysis is conducted using EXCEL. The software procedure is given below: Enter…
Q: What would be the standard error of the difference between the sample averages of the lifetimes of…
A: Given that For factory A, SD = 300, sample size n1 = 100 For factory B, SD = 150, sample size n2 =…
Q: Compute the population standard deviation of 11,3,22,12,5,24
A: 11,3,22,12,5,24
Q: Database A contains 40 data items and is made up with an equal number of the values of 0 and 100 and…
A: Given that Database A contains 40 data items and that is made up with an equal number of values of…
Q: In a class of 29 students, 28 of them took an exam in class and 1 student took a make-up exam the…
A: a) The average score for 28 exams is 81 points and standard deviation is 7.4.
Q: 9. A grading scale is set up for 1000 students' test scores. It is assumed that the scores are…
A: Let , random variable X be the test scores of student. The random variable X follows Normal…
Q: tor at a college noted that the grades students were normally distributed with a mean o and a…
A: Let "a" be the minimum score needed to make an A. A person scoring at least "a" marks will be…
Q: Find the interval of 90% for the population deviation 26 25 41 41 19 43 25 40 28 42 35 10 32 25 32…
A: Obtain the 90% confidence interval estimate of population standard deviation. The 90% confidence…
Q: Barbara scores X = 120 on a social work licensure exam for the state of Minnesota that has a mean of…
A:
Q: a. Find the margin of error, E. b. Explain the meaning of E as far as the accuracy of the estimate…
A:
Q: 5. A certain calculator circuit board is manufactured in lots of 200. If 1% of the the boards are…
A: Since the probability is fixed, we will apply binomial distribution here.
Q: A recent General Social Survey asked female respondents, "How many sex partners have you had in the…
A: The median is the positional average. It is the value in the data set that divides the data into…
Q: 18. If the mean test score of a distribution of exam scores is 78.75 with a standard deviation of…
A:
Q: Suppose that the flying hours for aircraft operated by regional airlines in the U.S. during 2006 are…
A: Given Information Mean µ = 2500 Standard deviation(σ) = 400 P (Z > z) = 0.975 P(Z<z) = 1 –…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
- 14 38. The income distribution of officers of a certain company was found to follow normal distribuiton. The average income of an officer was Rs. 15,000.00. The standard deviation of the income of officers was Rs. 5,000.00. If there were 242 officers drawing salary above Rs. 18,500.00, how many officers were there in the company ?23. Which set of numbers below will have the highest standard deviation? A. 1, 1, 2, 3, 5, 5, 9, 10, 10 B. 1, 1, 1, 2, 4, 9, 9, 19, 20 C. 2,4, 4, 6, 7, 8, 8, 10, 10 D. 3, 3, 3, 5, 5, 6, 7, 7, 7 E. 7,7,7, 7,7, 8, 8, 8, 863. According to the Internal Revenue Service, the average length of time for an individual to complete (keep records for, learn, prepare, copy, assemble, and send) IRS Form 1040 is 10.53 hours (without any attached schedules). The distribution is unknown. Let us assume that the standard deviation is two hours. Suppose we randomly sample 36 taxpayers. a. In words, X = b. In words, X = C. X ~ d. Would you be surprised if the 36 taxpayers finished their Form 1040s in an average of more than 12 hours? Explain why or why not in complete sentences. e. Would you be surprised if one taxpayer finished his or her Form 1040 in more than 12 hours? In a complete sentence, explain why.
- 14. A study using two random samples of 35 people each found that the average amount of time those in the age group of 26-35 years spent per week on leisure activities was 39.6 hours, and those in the age group of 46-55 years spent 35.4 hours Assume that the population standard deviation for those in the first age group found by previous studies is 6.3 hours, and the population standard deviation of those in the second group found by previous studies was 5.8 hours. At a = 0.05, can it be concluded that there is a significant difference in the average time each group spends on leisure activities?Calculate the means and standard deviations of:37, 26, 19, 21, 19, 25, 17 a. 3; 7.141 b. 3; 2.414 3; 6.9 23.4, 6.321 O C. d.4)Answer each question using the list of numbers provided below and use STDEV equation provided. {150,105,114,124,135,150,138,159} A) Mean B) Median C) What is the Mode= D) Standard Deviation= n(Ex?)-(Ex1)² п(п-1)
- The brain volumes (cm) of 20 brains have a mean of 1091.3 cm and a standard deviation of 121.3 cm. Use the given standard deviation and the range rule of thumb to identify the limits separating values that are significantly low or significantly high. For such data, would a brain volume of 1293.9 cm be significantly high? cm or lower Significantly low values are (Type an integer or a decimal. Do not round.) Comple Significantly high values are cm° or higher. This cou (Tune an intenor or a derimal Do not round ) Terms o Next Get more help - 8:37 PM 50°F Clear 3/27/2022 LL2. A statistic test has a mean of 78 and a standard deviation of 6. a) What is the z-score of a student who scored 89 on the test? b) What is the z-score of a student who scored 64 on the test? c) What is the z-score of a student who scored 78 on the test? d) What is the score of a student whose z-score is 1.24? e) What is the score of a student whose z-score is -.31? f) What is the score of a student whose z-score is -1? 3. For males in a certain towWn, the systolic blood pressure is normally distributed with a mean of 135 and a standard deviation of 8. a) What is the probability that a randomly selected male's systolic blood pressure will be greater than 143? b) What is the probability that a randomly selected male's systolic blood pressure will be less than 119?If the mean of five observations is 8 and their deviations about their mean :are Then the value of the .4,0,5-,3,2- =second observation is 3 O 6 O 11 O
