Assuming that 60,000 people in a given age group have normal division with an arithmetic mean of 55 and a standard deviation of 10 years, find the number of people aged 25-55. A) 32748 B) 50666 C) 26000 D) 46970 E) 29922

Assuming that 60,000 people in a given age group have normal division with an arithmetic mean of 55 and a standard deviation of 10 years, find the number of people aged 25-55. A) 32748 B) 50666 C) 26000 D) 46970 E) 29922

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Related questions

Q: Rank the data sets described in order of the least spread out (1) to the most spread out (5) based…

A: Given Data : Set A: σ=3.5 Set B: σ=8.02 Set C: σ=1.4 Set D: σ=5.7 Set…

Q: d) 3rd Quartile – 1st Quartile e) Standard deviation f) Coefficient of variation

A: 5. It is known- M + N = 110 2N - M = 37 On adding the above 2 equations- 3N = 147 => N = 49 So, M…

Q: 1. Here is a sample of ten grades on a Math exam: 71, 73, 77, 85, 86, 88, 88, 93, 94, 95. Find the…

Q: 42 The arithmetic mean and standard deviation of a series of 20 items were calculated by a student…

Q: A casino is interested in the relationship between the amount of alcohol people buy and the amount…

Q: 2. The frequency distribution for the systolic blood pressure readings (mmHg) of 200 randomly…

Q: The speeds of cars travelling on a certain highway are normally distributed with mean 98 km/h and…

A: As per bartleby guideline exapert have to answer first question only.

Q: please show work

A: Mean=100Standard deviation=15

Q: Based on this data, estimate the mean exam score for someone who spent 8 hours studying for their…

A: It is given that the two random variables X i.e, hour and Y i.e, Exam score.

Q: Assume that the duration of human pregnancies can be described by a normal model with mean 269 days…

Q: e) How will the mean and standard deviation of the numbers 6, 7, 8, 9, 10, 11, 12 differ from the…

Q: Assume the population mean (µ) is 8 seconds with a standard deviation (σ) of 2 seconds. a) How far…

A: The mean is 8 seconds and the standard deviation nis 2 seconds.

Q: A livestock company reports that the mean weight of a group of young steers is 1157 pounds with a…

Q: In 1996, there were 572 homicide deaths in Canada (based on data from Statistics Canada). For a…

A: The objective of this question is to find the mean (λ) of homicide deaths per day in Canada in 1996.

Q: 30. The mean and the standard deviation for a data set are 20 and 5 respectively. Then the…

A: Mean()=20standard deviation()=5x=17

Q: E. How large a sample is needed if we want to be 95% co- mean life span of the batteries is not off…

A: Life span of batteries are normally distributed with mean 15 and standard deviation is 2…

Q: Find the mean of first six multiples of 4? If the mean of 9,8,10,x,12 is 15, find the value of x?…

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

Q: 12 - Prove that the sum of the deviations of the values from their arithmetic scale for classified…

A: Arithmetic scale or arithmetic mean, means that sum of the all the Values divided by total number…

Q: A distribution with a mean of 76 and a standard deviation of 12 is transformed into a standardized…

A: The following information is provided in the question μOld=76 σOld=12μNew=95σNew=7 Now, a. First…

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the…

A: Given that IQ scores are normally distributed with Mean (μ) = 100 Standard deviation (σ) = 15…

Q: Determine the setting required so that 99% of the components are longer than 40.0mm

A: a machine produces components whose lengths are dictated by the settings on a dial. At a setting of…

Q: The standard deviation of the population of IQ score is standardized to be 85 points. Calculate the…

Q: The mean IQ score of the students enrolled in University X is 100 and the standard iation is 16.1 A)…

A: Consider X be a random variable which follows normal distribution indicates the IQ scores of the…

Q: Use the Normal model N(1163,79) for the weights of steers. a) What weight represents the 52nd…

A: GivenNormal model N(1163,79)Mean(μ)=1163standard devaition(σ)=79

Q: Wore a bicycle helmet (among students who had ridden a bieyele during the previous 12 months)?…

Q: 11 20 2) Fill in the table below: Fill in the differences of each data value from the mean, the…

A: Given that X (X-μ) (X-μ)2 9 -4 11 -2 20 7 6 -7 19 6 ∑x=65 ∑(X-μ) ∑(X-μ)2=…

Q: For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 33 beats…

A: Given that, (a) The difference between the pulse rate of 33 beats per minute and the mean pulse…

Q: IQ scores are known to be approximately normally distributed, with a mean of 100 and a standard…

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

Q: The weights of 300 males were measured. The mean weight was 80kg and the standard deviation was…

Q: A random sample of the birth weights of 186 babies has a mean of 3103 g. These babies were born to…

A: Given, number of birth babies = 186 mean = 3103 g

Q: 6) A professor timed all students in his Statistics class for how long it took them to complete the…

A: Note: Hi! Thank you for the question. As you have posted multiple sub-parts, we have helped you…

Q: A police department released the numbers of calls for the different days of the week during the…

A: H0=Police calls occur with the same frequency on the different days of the week. H1=At least one day…

Q: 1) A teacher gives and exam with a mean of 82 and an SD of 8. a) what proportion did scored an A? b)…

A: Question 1)The mean of the distribution is .The standard deviation of the distribution is The score…

Q: 2. In an advertisement, a certain brand of shampoo is claiming that the use of this product will…

Q: The mean of 100 observations is 50 and their standard deviation is 5. The sum of all squares of all…

A: Given that ,550100Using formula,

Q: 1) Here are the weights in pounds of a sample of 10 students in fourth grade class: 61, 64, 66, 74,…

A: A) Mean: Mean(x¯)=Sum of data valuesNumber of data values =61+64+66+74+77+78+78+83+84+8510…

Q: 29. The average salary in Company A is $8000. The average salary in Company B is $7000. If an…

A: The average salary in Company A is $8000. The average salary in Company B is $7000.An employee who…

Q: 35) The mean score of a college entrance test is 500, the standard deviation is 75. The score…

A: Mean(μ)=500 standard deviation(σ)=75

Q: A livestock company reports that the mean weight of a group of young steers is 1121 pounds with a…

A: From the provided information, Mean (µ) = 1121 pounds Standard deviation (σ) = 79 pounds Let X be a…

Q: Mean 170 standard deviation 5 we find the heights of 80 people . a) how many would you expect to be…

Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

25 - Assuming that 60,000 people in a given age group have normal division with an arithmetic mean of 55 and a standard deviation of 10 years, find the number of people aged 25-55.

A) 32748

B) 50666

C) 26000

D) 46970

E) 29922

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Point Estimation, Limit Theorems, Approximations, and Bounds$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, probability and related others by exploring similar questions and additional content below.

Similar questions

2. 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?
30) The numbers below represent the amount of precipitation, in inches, on January Ist in elev different U.S. cities. Find the mean precipitation. 0.141 0.087 0.123 0.086 0.103 0.108 0.125 0.082 0.134 0.137 0.071
3. Normal Distribution and Z - Scores Assume a normal distribution for a population of scores for a standardized exam. The average exam score is 70, and the standard deviation is 5. Jeff's exam score is 63. a) What percentage of the population has an exam score greater than Jeff's? b) What percentage of the population has an exam score greater than Jeff's but less than the score of 74? c) If 10,000 people were given the exam, how many of them have an exam score less than Jeff's?
Use the Normal model N(1183,74) for the weights of steers. a) What weight represents the 35th percentile? b) What weight represents the 94th percentile? c) What's the IQR of the weights of these steers? a) The weight representing the 35th percentile is nothing blank pounds?
Diastolic blood pressures are assumed to follow a normal distribution with a mean of 85 and a standard deviation of 12. What proportion of people has diastolic blood pressures less than 80? A)0.661 B)0.338 C)0.50 D)0.75
Average monthly wages (per employee) in 4 sectors of an economy are as follows: industry: 2000 dinars, building: 2200 dinars, agriculture: 1500 dinars, services: 1800 dinars. Number of people employed in the four sectors are 5 million, 2 million, 6 million, and 2 million, respectively. Using the concept of harmonic mean compute the average monthly wages in the economy under consideration.
0 - Which of the following frequency does not give information about the status of a data class in the total data? a) percent frequency B) Tuned frequency C) relative frequency D) proportional frequency TO) cumulative frequency
For a certain type of computers, the length of time between charges of the battery is normally distributed with a mean of 50 hours and a standard deviation of 15 hours. Write down the function, draw bell-shaped curve & calculate the: a)Area between 50 and 70 hours. b)Area above 40 hours. c)X value that has 28% area above it. d)X value that has 60% area below it.