### Frequency distribution: mean and standard deviation

Determine the mean and the standard deviation of the following frequency distribution. CLASS FREQUENCY 0 UP TO 5 2 5 UP TO 10 7 10 UP TO 15 12 15 UP TO 20 6 20 UP TO 25

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Determine the mean and the standard deviation of the following frequency distribution. CLASS FREQUENCY 0 UP TO 5 2 5 UP TO 10 7 10 UP TO 15 12 15 UP TO 20 6 20 UP TO 25

1. Suppose that you had one hundred individuals' test scores on a 200-point test. Suppose that the distribution of test scores was as follows. 70 percent of the scores were between 95 and 105. the remainder of the scores were spread out approximately evenly in each of two tails of the distribution. Which of the following bes

Problem 13.5 A mail-order catalog business selling personal computer supplies, software, and hardware maintains a centralized warehouse. Management is currently examining the process of distribution from the warehouse and wants to study the factors that affect warehouse distribution costs. Currently, a small handling fee is adde

The following chart shows the hourly wages of a sample of certified welders in the Atlanta, Georgia, area. (see attached) How many welders were studied? What is the class interval? About how many welders earn less than $10.00 per hour? About 75 percent of the welders make less than what amount? Ten of the welders s

The Quick Change Oil Company has a number of outlets in the metropolitan Seattle area. The numbers of oil changes at the Oak Street outlet in the past 20 days are: (see attached file for chart) The data is to be organized into a frequency distribution. 1. How many classes would you recommend? 2. What class interva

The following data give the weekly amounts spent on groceries for a sample of households. $271 $363 $159 $ 76 $227 $337 $295 $319 $250 279 205 279 266 199 177 162 232 303 192 181 321 309 246 278 50 41 335 116 100 151 240 474 297 170

The manufacturer of a computer terminal reports in its advertising that the mean life of the terminal, under normal use, is 6 years, with a standard deviation of 1.4 years. (Assume these are population values.) A sample of 90 units sold 10 years ago revealed the following distribution of the lengths of life. At the .05 signif

31. Determine the estimated mean of the following frequency distribution. Class Frequency 20 up to 30 7 30 up to 40 12 40 up to 50 21 50 up to 60 18 60 up to 70

30.Determine the estimated mean of the following frequency distribution class frequency 0 up to 5 2 5 up to 10 7 10 up to 15 12 15 up to 20 6 20

30) Determine the estimated mean of the following frequency distribution Class frequency 0 up to 5 2 5 up to 10 7 10 up to 15 12 15 up to 20 6 20 up to 25 3

A. Construct a frequency distibution table for the following 30 data values ... b. Create a frequency polygon for the above data ... Please see attached for complete question. Thanks!

Here are the shopping times (in minutes) for a sample of 21 shoppers at a particular grocery store: 26 23 44 41 38 35 31 28 25 22 43 40 37 34 31 43 43 39 39 36 36 Draw the frequency polygon for these data using an initial class boundary of 21.5, an ending class boundary of 46.5 and 5 classes. Note that you can add or remove

Part I: Find 50 numbers in documents that are available to the general public (newspapers, magazines, etc.) and record the first nonzero digit. Summarize the results in the relative frequency table on the next page (be sure to use the column "first digits"). Identify the source(s) of your numbers here. Please see attached.

I'm not sure you can help me, but here is the problems that I have to have answered by next week. I don't have the SPSS DATA yet, so you will have to respond in general terms. The textbook we are using is Research Methods &Statistics 7th edition by Healey. And we are supposed to use the software to solve these problems SPSS 12.0

Perception of EEO in Division Stem-and-Leaf Plot {see attachment for distributions} Discussion The data is based on five questions about EEO with the Columbus Fire Division that were asked on potential job applicants. Each item was a statement about EEO within the Fire Division Response were made on a five point scale fro

In a roadside interview survey, a random sample of all vehicles crossing each of a set of intersections is taken. Assume that every trip made in the area of interest over the duration of the study is equally likely to be sampled by this method. One question asked in survey concerns the total number of home-based round trips made

20. A certain town of population size 100,000 has 3 news papers: I, II, and III. The proportions of townspeople who read these papers are as follows: I: 10% I and II: 8% I and II and III: 1% II: 30% I and III: 2% III: 5% II and III: 4% (The list tells us, for instance, that 80

1. A statistic is a measurement of some characteristic of a sample and a _________ is a measurement of some characteristic of a population. 2. Idenitify the following as discrete of continuous data: A) Weights of grizzly bears: ________ B) Number of grizzly bears in the fifty states: ________ C) Radar indicating that Mr. N

1500 people were genotyped at two loci, G and H. Each locus had two alleles (G/g and H/h). The results were (frequency given for each two-locus genotype): Two-locus genotype Frequency GGHH 0.1020 GgHH 0.1341 ggHH 0.0441 GGHh

Table displays a frequency distribution for the enrollment and frequencies are in 1000s. Grade, x Frequency/Probability P(x)/ xP(x)/ (x-µ )sqP(x) 9 3604 10 3131 11 2749 12 2488 Total------------------------------µ= -------sigma sq=

1. Grade, x Freq Probability P(x) xP(x) (x-µ )sqP(x) 9 3604 10 3131 11 2749 12 2488 Total µ= sigma sq= Determine the probability distribution of the randum varible x. What is the probability taht a randomly selected student is either in the 9th or 10th grade? What is the pro

Please see the attached file for full problem description. --- To determine a target audience for a new email package, a computer company surveyed a large sample of potential customers, asking each whether he or she uses email on a regular basis. (The company considered "a regular basis" to be at least three times a week.) T

11. Consider the following data. 14 21 23 21 16 19 22 25 16 16 24 24 25 19 16 19 18 19 21 12 15 17 18 23 25 20 23 16 20 19 24 26 15 22 24 21 22 24 22 20 a. Develop a frequency distribution using class limits of 12-14, 15-17, 18-20, 21-23, and 24-26. b. Develop a relative frequency distribu

Please see the attached file for full problem description. --- ClairLinx Wireless, a start-up cell phone company, has divided its market of potential customers into three major groups: single, working; married, working; and retired. ClairLinx surveyed potential customers and asked each, "Of the following, which do you consi

Some investors take the strategy of investing in local companies. Each day the city newspaper carries the daily closing stock prices for some of the local companies. On a recent day, the closing prices for 37 companies were listed as follows: (see data in attached file) How would you create a data array for these data. I

The 30 members of an orchestra were asked how many instruments each could play. The results are set out in the frequency distribution. Calculate the mean number of instruments played: Number of instruments, x 1 2 3 4 5 Frequency, f 11 10 5 3 1

The following data show the age distribution of the top 14 doctors in the emergency faculty of a local hospital. Age Frequency 35-39 2 40-44 2 45-49 1 50-54 3 55-59 4 60-64 2 Construct a "more than" and "less than" cumulative frequency polygon

An airline is trying to determine the number of operators needed for the different areas of their reservation system. The reservation system first asks customers whether they want to schedule a domestic or an international flight. Sixty-five percent of the reservations are for domestic flights. Callers then have the option of

The Air Transport Association of America published figures on the busiest airports in the United States. The following frequency distribution has been constructed from these figures for the year 2000. NUMBER OF PASSENGERS ARRIVING AND DEPARTING (MILLIONS) NUMBER OF AIRPORTS 20 - under 30 8 30 - under 40

For the following data set, what is the relative frequency of the class with a lower cut point at 100 and upper cutpoint at 150? {0, 41, 65, 83, 103, 112, 138, 150, 178, 232}