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December 22, 2014

December 22, 2014

**Recent Homework Questions About Statistics**

Post a New Question | Current Questions

**statistics**

Test consist of 10 multiple choice questions each having 4 possible answers one being correct. you guessed all 10 what is the probability of getting less than 30%
*Saturday, July 13, 2013 at 12:10am*

**statistics**

MBA604 Statistics Assignment 1 Part 1 1) (5 pts) An electronics company is about to launch a new product. If the serial number for each piece produced has the following format: LLNNN where L stands for any letter in the English alphabet and N is a number from 0 to 9, please ...
*Friday, July 12, 2013 at 9:31am*

**statistics**

MBA604 Statistics Assignment 1 Part 1 1) (5 pts) An electronics company is about to launch a new product. If the serial number for each piece produced has the following format: LLNNN where L stands for any letter in the English alphabet and N is a number from 0 to 9, please ...
*Friday, July 12, 2013 at 9:29am*

**Statistics **

Post a null hypothesis that would use a t test statistical analysis.. Use the same hypothetical situation taken in the t test hypothesis, and turn it into a null hypothesis using a one-way ANOVA analysis and a two-way ANOVA.
*Thursday, July 11, 2013 at 8:29pm*

**statistics**

The same calculus exam has a normal distribution with a mean of 76 and a standard deviation of 6. Find the percentage of students that scored between 65 and 90.
*Thursday, July 11, 2013 at 5:25pm*

**Business Statistics**

You wish to learn the proportion of MBA students that are female within 3%, and with 98% confidence. How large of a sample should you get?
*Thursday, July 11, 2013 at 3:08am*

**Statistics**

1. z test 2. t test for independent samples, and 3. t test for dependent samples Hi! I really need help with this statistics. Its just that you suggest one psychological research question that could be answered by each of the following types of statistical tests above. Im so ...
*Thursday, July 11, 2013 at 1:02am*

**statistics**

Miller (2008) examined the energy drink consumption of college undergraduates and found that males use energy drinks significantly more often than females. To further investigate this phenomenon, suppose a researcher selects a random sample of n=36 male undergraduates and a ...
*Wednesday, July 10, 2013 at 3:02am*

**statistics**

Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two 30-second segments from “The Collection from the Best of Classical Music.” After listening to a segment, the students rated it on a scale from 1 ...
*Tuesday, July 9, 2013 at 9:12pm*

**Statistics**

The following risk ratios give the increased risk for various diseases comparing two groups (exposed vs. unexposed). a. 2.5 (2.0, 3.0) b. 1.03 (1.02, 1.04) c. 6.0 (.85, 9.8) d. 0.98 (0.88, 1.08) e. 0.20 (.05, 1.05) Which risk ratios are statistically significant at the 0.05 ...
*Tuesday, July 9, 2013 at 9:50am*

**statistics**

The respiratory rate per minute in newborns varies according to a distribution that is approximately Normal with mean 50 and standard deviation 5. The proportion of observations from a standard Normal distribution that take values less than 1.15 is about (a) 0.1251. (b) 0.8531...
*Tuesday, July 9, 2013 at 2:02am*

**statistics**

A manufacturer of fishing line claims that by using machines, rather than people, at the assembly plant that this will reduce the amount of defects in the line. Currently the defective rate is 15 per 1000 ft. Which is the correct null hypothesis?
*Tuesday, July 9, 2013 at 1:31am*

**statistics **

A new medication has been created to treat osteo-arthritis inflammation and pain. Doctors prescribing the drug claim that the drug is not as effective for women as men since women taking the medication have higher pain levels than men. The pharmaceutical company conducts a ...
*Monday, July 8, 2013 at 10:19pm*

**statistics **

A new medication has been created to treat osteo-arthritis inflammation and pain. Doctors prescribing the drug claim that the drug is not as effective for women as men since women taking the medication have higher pain levels than men. The pharmaceutical company conducts a ...
*Monday, July 8, 2013 at 10:18pm*

**Statistics!!!**

c. The correlation between number of friends and grade point average (GPA) for 50 adolescents is .37. Is this significant at the .05 level for a two-tailed test?
*Monday, July 8, 2013 at 4:21pm*

**Statistics!!!**

b. The correlation between the number correct on a math test and the time it takes to complete the test is -.45. Test whether this correlation is significant for 80 children at the .05 level of significance. Choose either a one-or two-tailed test and justify your choice.
*Monday, July 8, 2013 at 4:21pm*

**Statistics!!!**

a. The correlation between speed and strength for 20 women is .567. Test these results at the .01 level using a one-tailed test.
*Monday, July 8, 2013 at 4:20pm*

**statistics**

Investment analysts generally believe the interest rate on bonds is inversely related to the prime interest rate for loans; that is bonds perform well when lending rates are down and perform poorly when interest rates are up. Can the bond rate be predicted by the prime ...
*Monday, July 8, 2013 at 12:08pm*

**statistics**

Suppose a researcher gathered survey data from 19 employees and asked the employees to rate their job satisfaction on a scale from 0 to 100 (with 100 being perfectly satisfied). Suppose the following data represent the results of this survey. Assume that relationship with ...
*Monday, July 8, 2013 at 12:04pm*

**statistics**

Shown below are rental and leasing revenue figures for office machinery and equipment in the United States over a sever-year period according to the U.S. Census Bureau. Use these data to run a linear regression and then forecast the rental and leasing revenue for the year 2012...
*Monday, July 8, 2013 at 11:53am*

**Statistics**

In the Federal Trade Commission (FTC) \Price Check" study of electronic checkout scanners, the FTC inspected 1,669 scanners at retail stores and supermarkets by scanning a sample of items at each store and determining if the scanned price was accurate. The FTC gives a ...
*Monday, July 8, 2013 at 11:39am*

**Statistics**

How would a histogram change if we increase the number of simulations? A. It would simply be more smooth. B. The p-value would get smaller. C. The standard error would get smaller. D. The distribution would be more similar to a T-distribution.
*Monday, July 8, 2013 at 4:25am*

**Statistics**

The Centers for Disease Control (CDC) collects yearly statistics on drinking behavior in the United States by surveying a random sample of U.S. adults. The following data display the percent of adults aged 18 years and over who had 5 or more drinks in 1 day at least once in ...
*Monday, July 8, 2013 at 4:13am*

**Statistics - Help!**

I really really need help with this. Can someone please look at it and let me know. At 100 college campuses, 1200 full-time undergraduate students were surveyed on their credit card usage. Among juniors, 65% reported that they didn't have a credit card in their own name, ...
*Sunday, July 7, 2013 at 9:33pm*

**Statistics**

Examples please!Create a drawing or plan for a 2 x 3 experimental design that would lend itself to a factorial ANOVA. Be sure to identify the independent and dependent variables.
*Sunday, July 7, 2013 at 8:17pm*

**Statistics**

An analysis of variance was used to evaluate the mean differences from a repeated-measures research study. The results were reported as F(3,24)=6.40. a. How many treatment conditions were compared in the study? b. How many individuals participated in the study?
*Sunday, July 7, 2013 at 8:16pm*

**Statistics**

A researcher reports an F-ratio with df= 2, 12 for a repeated measures of ANOVA. a. How many treatment conditions were compared in the study? b. How many individuals participated in the study?
*Sunday, July 7, 2013 at 8:16pm*

**statistics**

A researcher reports an F-ratio with df= 2, 12 for a repeated measures of ANOVA. How many treatment conditions were compared in the study?
*Sunday, July 7, 2013 at 7:16pm*

**Statistics**

At 100 college campuses, 1200 full-time undergraduate students were surveyed on their credit card usage. Among juniors, 65% reported that they didn't have a credit card in their own name, and 23% reported that they had at least one credit card in their own name and they ...
*Sunday, July 7, 2013 at 3:13pm*

**Statistics/Probability**

3. On a given evening, two roommates, roommate A and roommate B, are arguing over who should control the television remote. Roommate A suggests a game of rock-paper-scissors to settle the dispute. It's the first time that the roommates have played each other in rock-paper-...
*Sunday, July 7, 2013 at 12:15pm*

**Statistics/Probability**

2. Two roommates, roommate X and roommate Y, are expecting company and are arguing over who should have to wash the dishes before the company arrives. Roommate X suggests a game of rock-paper-scissors to settle the dispute. Consider the game of rock-paper-scissors to be a ...
*Sunday, July 7, 2013 at 12:00pm*

**Statistics/Probability**

1. Two roommates, roommate A and roommate B, are about to go cruising with a mutual friend and are arguing over who gets to sit in the front seat. Roommate A suggests a game of rock-paper-scissors to settle the dispute. Consider the game of rock-paper-scissor to be a ...
*Sunday, July 7, 2013 at 11:34am*

**statistics**

According to the local real estate board, the average number of days that homes stay on the market before selling is 78.4 with a standard deviation equal to 11 days. A prospective seller selected a random sample of 36 homes from the multiple listing service. Above what value ...
*Saturday, July 6, 2013 at 1:39pm*

**statistics**

If I know that a set of test scores has a mean of 75 and a standard deviation of 8 what can I conclude?
*Friday, July 5, 2013 at 8:47pm*

**Statistics**

A district mathematics test for all third graders had a normal distribution with a mean of 74 and a standard deviation of 11. What percentage of the third graders tested scored with +1 and -1 standard deviation of the mean?
*Friday, July 5, 2013 at 2:12pm*

**statistics **

1. Are there more broken bones in summer or winter? We get records about the number of fractures treated in January and July at a random sample of 25 emergency rooms. The 95% confidence interval for the mean change ( μd = μJan - μJuly )in the numbers of ...
*Thursday, July 4, 2013 at 3:54pm*

**Statistics**

The distribution of heights of adult American men is approximately normal with a mean of 68 inches and a standard deviation of 2 inches. What percent of mean are at least 72 inches tall?
*Thursday, July 4, 2013 at 3:02pm*

**statistics **

The makers of the MAGNETIZER Engine Energizer System (EES) claim that it improves gas mileage and reduces emissions in automobiles by using magnetic free energy to increase the amount of oxygen in the fuel for greater combustion efficiency. Following are test results, ...
*Thursday, July 4, 2013 at 1:07pm*

**statistics**

population with a mean of 110 and a standard deviation of 6, what is the likelihood of a score of 100 or lower
*Thursday, July 4, 2013 at 12:31am*

**statistics**

There is a table of AVERAGE monthly temperatures of two different areas of the same city. A scatterplot of the data is made to show that the relationship is linear between the two. If raw data was used instead of the averages to make the scatterplot, the correlation ...
*Wednesday, July 3, 2013 at 10:36pm*

**statistics **

A new medication has been created to treat osteo-arthritis inflammation and pain. Doctors prescribing the drug claim that the drug is not as effective for women as men since women taking the medication have higher pain levels than men. The pharmaceutical company conducts a ...
*Wednesday, July 3, 2013 at 11:55am*

**graduate statistics**

Does computer-assisted instruction help community college health students with reading difficulties to learn reading skills at a faster than normal rate? A researcher arranged for one of these students to have access to a set of computer-learning programs instead of the normal...
*Wednesday, July 3, 2013 at 10:18am*

**graduate statistics**

Do children from lower socioeconomic status (SES) neighborhoods have lower than average test-taking skills? A researcher administered a standard measure of test-taking skills to a randomly chosen child from a low SES neighborhood and found him to have a score of 38. The ...
*Wednesday, July 3, 2013 at 10:17am*

**graduate statistics**

A nursing professor was curious as to whether the students in a very large class she was teaching who turned in their tests first scored differently from the overall mean on the test. The overall mean score on the test was 75 with a standard deviation of 10; the scores were ...
*Wednesday, July 3, 2013 at 10:17am*

**Statistics**

A test is made of H0: mean = 27 versus H1: mean < 27. The true value of the mean is 27, and H0 is rejected. Is this a Type I error, Type II error, or a correct decision? How do I determine which is which??? Question 4 options: 1) Type II error 2) Type I error 3) Correct ...
*Tuesday, July 2, 2013 at 7:30pm*

**Statistics**

Siegel found that elderly people who owned dogs were less likely to pay visits to their doctors after upsetting events than were those who didn’t own pets. Similarly, consider the following hypothetical data. A sample of elderly dog owners is compared to a similar group (...
*Tuesday, July 2, 2013 at 6:19pm*

**Statistics **

Two dice are tossed. What is the probability that the sum of both dice is a prime number? This is what I have so far Presuming two fair, 6-sided dice, each numbered 1 through 6: You can achieve one of the following results on any given roll: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12...
*Tuesday, July 2, 2013 at 4:31pm*

**statistics**

population mean of 110 and SD of 6, what is likelihood of having score of 100 0r lower
*Tuesday, July 2, 2013 at 1:55pm*

**Statistics**

In a recent year, Delaware had the highest per capita annual income with $51,803. If o=$4850, find the mean X that falls at the 95th percentile for a sample of 35 residents.
*Tuesday, July 2, 2013 at 10:25am*

**statistics**

how to caculate using a ruler to measure the thickness of a 25 pages in a textbook
*Tuesday, July 2, 2013 at 1:04am*

**statistics**

how to caculate using a ruler to measure the thickness of a 25 pages in a textbook
*Tuesday, July 2, 2013 at 1:04am*

**Statistics**

A company has developed a new type of light bulb, and wants to estimate its mean lifetime. A simple random sample of 12 bulbs had a sample mean lifetime of 692 hours with a sample standard deviation of 30 hours. It is reasonable to believe that the population is approximately ...
*Monday, July 1, 2013 at 7:01pm*

**Statistics**

What critical value for z would be used to test the hypotheses: H0:μ≤10 and Ha:μ>10, for α = 0.05 ?
*Monday, July 1, 2013 at 3:06pm*

**statistics**

A senator asks his constituents to rank seven issues in order of importance. How many rankings are possible?
*Monday, July 1, 2013 at 12:28pm*

**statistics**

Assuming SAT score data are normally distributed, if only the top 25% of students based on SAT scores qualify to be interviewed for a particular school what would be the minimum score required to have to be interviewed if the population mean is a 1509 and the standard ...
*Monday, July 1, 2013 at 7:01am*

**Statistics**

A department store is running a promo one Saturday by giving out coupons for $10 of free merchandise. However, one-third of customers spend $40, and one-third spend$75. The remainder of customers who come in the store do not take advantage of the promo at all. A) find expected...
*Sunday, June 30, 2013 at 11:26pm*

**Business Statistics**

Using the telephone numbers listed in your local directory as your population, randomly obtain 20 samples of size 3. From each telephone number identified as a source, take the fourth, fifth, and sixth digits.
*Sunday, June 30, 2013 at 7:58pm*

**Statistics**

you are going to test the claim that more than 60% of men refuse to ask for directions when lost. if you use a significance level of .10, what will the critical number be for your rejection region?
*Sunday, June 30, 2013 at 5:53pm*

**psych statistics**

Martha believes that a relaxation technique involving visualization will help people with mild insomnia fall asleep faster. She randomly selects a sample of 20 participants from a group of mild insomnia patients and randomly assigns 10 to receive visualization therapy. The ...
*Sunday, June 30, 2013 at 5:15pm*

**college algebra: probability and statistics**

You roll a single die once. What is the probability you will roll an odd number or an even number?
*Sunday, June 30, 2013 at 3:58pm*

**Statistics**

Many times, we are required to use statistical measures to try and construct a problem. We run a program for a 10 different inputs. The times are measures in 1-second intervals and none of them took 0 secs. a. Suppose the standard deviation of a set of times we run the program...
*Sunday, June 30, 2013 at 2:51pm*

**Statistics**

There is a mathematical theory called queuing theory that studies ways in which computer jobs are fed in CPUs and researches on how these can be reduced to a minimum. Show how can a computer estimate the average number of jobs waiting at a queue? Suppose that in a 5 sec ...
*Sunday, June 30, 2013 at 2:46pm*

**Statistics**

Can anyone tell me how to use TI-84 calculator to solve this problem??? A company has developed a new type of light bulb, and wants to estimate its mean lifetime. A simple random sample of 12 bulbs had a sample mean lifetime of 692 hours with a sample standard deviation of 30 ...
*Saturday, June 29, 2013 at 11:02pm*

**Statistics**

Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = 2.6+.1x (b) Find the ordinates y hat for the points on the line of best fit ...
*Saturday, June 29, 2013 at 8:32pm*

**statistics**

a random sample from the population of registered voters in california is to be taken and then surveyed about an upcoming election. What sample size should be used to guarantee a sampling error of 3% or less when estimating p at the 95% confidence level? is this the answer......
*Saturday, June 29, 2013 at 6:21pm*

**statistics**

The population (in millions) and the violent crime rate (per 1000) were recorded for 10 metropolitan areas. The data are shown in the following table. Do these data provide evidence to reject the null hypothesis that ƒÏ = 0 in favor of ƒÏ ‚ 0 at...
*Saturday, June 29, 2013 at 5:46pm*

**Statistics**

The arena has a policy of selling as many as 16 tickets for a show for which there are only 15 seats available. The manager has noticed in the past that only 88% of people who purchase a ticket annually come for the show. Find the probability that if 16 tickets are sold, not ...
*Saturday, June 29, 2013 at 3:33pm*

**statistics**

assume you have a data set from a normally distributed random variable. answer the following: will the random variable be discrete, continuous, or neither? How do you know? I believe its continuous but cant explain why will the data be qualitative or quantitative? How do you ...
*Saturday, June 29, 2013 at 1:56pm*

**statistics**

comment on this statement "The mean loss for customers at the first State bank (which is not insured) was $150.00 the standard deviation of the losses was -$125.00"
*Friday, June 28, 2013 at 12:22pm*

**statistics **

Randomly selected cans of Coke are measured for the amount of cola in ounces. The sample values listed below have a mean of 12.18 ounces and a standard deviation of 0.118 ounces. Use DataDesk to find a 99% confidence interval for the mean volume of Coke in cans. Show the upper...
*Friday, June 28, 2013 at 12:03pm*

**Statistics.**

A person apply for a job in two firms say X&Y, the probability of his been selected in firm X is 0.7, and been rejected in firm Y is 0.5. The probability of atleast 1 of his application been rejected is 0.6. What is the probability he will be selected in one of the two firms.
*Friday, June 28, 2013 at 3:30am*

**statistics**

n youth corp have to stand in a row if all possible permutations;are equally likely. Fine the probability that 2 particular corp members stand side by side.
*Friday, June 28, 2013 at 3:16am*

**statistics **

Politicians are interested in knowing the opinions of their constituents on important issues. One administrative assistant to a senator claims that more than 63% of adult women favor stricter gun laws. A recent telephone survey of 1026 adults by IBR Polls found that 65.9% of ...
*Thursday, June 27, 2013 at 7:25pm*

**statistics **

Which of the following criteria must be met to do a one-sample test for a proportion? A. The data values in the sample must be independent. B. The parent population must be normally distributed. C. The data must come from a random sample. D. The sample size must be more than ...
*Thursday, June 27, 2013 at 6:34pm*

**Statistics **

Politicians are interested in knowing the opinions of their constituents on important issues. One administrative assistant to a senator claims that more than 63% of adult women favor stricter gun laws. A recent telephone survey of 1026 adult women by IBR Polls found that 65.9...
*Thursday, June 27, 2013 at 5:55pm*

**Statistics **

Politicians are interested in knowing the opinions of their constituents on important issues. One administrative assistant to a senator claims that more than 63% of adult women favor stricter gun laws. A recent telephone survey of 1026 adults by IBR Polls found that 65.9% of ...
*Thursday, June 27, 2013 at 5:52pm*

**statistics & probability**

according to a survey, 30% of 18-25 year olds have blue eyes. In a random sample of 8 people in this age group what is the probability that exactly 0 have blue eyes?
*Thursday, June 27, 2013 at 2:03am*

**Statistics**

If 1000 raffle tickets were sold for a TV prize that is worth $275 and a ticket number is drawn to determine the winner, what is the expected value of the raffle?
*Thursday, June 27, 2013 at 12:09am*

**Statistics Help**

Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (b) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4 = ì...
*Wednesday, June 26, 2013 at 8:49pm*

**Statistics**

A simple random sample of 10 households, the number of TV's that each household had is as follows: 1, 3, 1, 2, 0, 2, 1, 1, 1, 5 Assume that it is reasonable to believe that the population is approximately normal and the population standard deviation is 0.56. What is the ...
*Wednesday, June 26, 2013 at 2:25pm*

**statistics**

2. The manager of a sandwich shop gathers data on what people spend on lunch on a particular day of the week. The results are $4.20, $4.22, $2.35, $4.32, $5.25, $6.48, $6.78, $8.59, $6.95, $5.52, $6.83, $7.35, $4.36, $9.39, $6.42. To the degree that this represents the ...
*Wednesday, June 26, 2013 at 1:52pm*

**Statistics**

A college admissions officer takes a simple random sample of 103 entering freshmen and computes their mean mathematics SAT score to be 493. Assume the population standard deviation is 112. What is the lower bound of the 99% confidence interval? Round your answer to the nearest...
*Wednesday, June 26, 2013 at 9:30am*

**statistics**

A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard ...
*Wednesday, June 26, 2013 at 5:10am*

**statistics**

A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard ...
*Wednesday, June 26, 2013 at 4:16am*

**statistics**

A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard ...
*Wednesday, June 26, 2013 at 4:15am*

**statistics**

A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard ...
*Wednesday, June 26, 2013 at 4:09am*

**Statistics check**

Complete the hypothesis test with alternative hypothesis ƒÊd ‚ 0 based on the paired data that follows and d = O - Y. Use ƒ¿ = 0.01. Assume normality. Oldest 188 174 192 196 65 Youngest 186 168 199 199 69 (a) Find t. (Give your answer correct ...
*Tuesday, June 25, 2013 at 8:00pm*

**statistics**

Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4 = ì...
*Tuesday, June 25, 2013 at 7:54pm*

**Statistics**

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321
*Tuesday, June 25, 2013 at 7:52pm*

**statistics**

The mean loss for customers at the first State bank (which is not insured) was $150.00 the standard deviation of the losses was -$125.00
*Tuesday, June 25, 2013 at 5:08pm*

**statistics**

the mean loss for customers at first state bank (which was not insured) was $150. The standard deviation of the losses was -$125
*Tuesday, June 25, 2013 at 3:21pm*

**statistics**

According to Advertising Age, the average base salary for women working as copywriters is $66,000. Assume that the salaries are normally distributed and that the standard deviation is $7,500. a. What is the probability of a woman receiving a salary between $60,000 and $75,000...
*Tuesday, June 25, 2013 at 12:31pm*

**statistics**

The Stop N’ Go convenience chain recently selected a random sample of 10 customers. The store monitored the number of times each customer made a purchase at the store over a two-month period. The following data were collected:
*Tuesday, June 25, 2013 at 12:21pm*

**statistics help**

Complete the hypothesis test with alternative hypothesis ƒÊd ‚ 0 based on the paired data that follows and d = O - Y. Use ƒ¿ = 0.01. Assume normality. Oldest 188 174 192 196 65 Youngest 186 168 199 199 69 (a) Find t. (Give your answer correct ...
*Monday, June 24, 2013 at 10:28pm*

**statistics**

Could someone work a problem like this one, for an example. Complete the hypothesis test with alternative hypothesis ìd < 0 based on the paired data that follow and d = M - N. Use á = 0.02. Assume normality. M 49 67 45 57 57 48 N 57 68 47 60 64 55 (a) Find t...
*Monday, June 24, 2013 at 5:39pm*

**statistics**

6. According to the records of Enersource, an electric company serving the Mississauga area, the mean electricity consumption for all households during winter is 1650 kilowatt-hours per month. Assume that the monthly electricity consumption during winter by all households in ...
*Sunday, June 23, 2013 at 9:51pm*

**statistics**

The pucks used by the National Hockey League for ice hockey must weigh between 5.5 and 6.0 ounces. Suppose the weights of pucks produced at a factory are normally distributed with a mean of 5.75 ounces and a standard deviation of 0.11 ounce. What percentage of the pucks ...
*Sunday, June 23, 2013 at 9:51pm*

**statistics**

Page 1 of 2 4. Despite all efforts by the quality control department, the fabric made at Benton Corporation always contains a few defects. A certain type of fabric made at this corporation contains an average of .5 defects per 500 yards. Using the Poisson formula, find the ...
*Sunday, June 23, 2013 at 9:51pm*

**statistics**

3. Magnetic resonance imaging (MRI) is a process that produces internal body images using a strong magnetic field. Some patients become claustrophobic and require sedation because they are required to lie within a small, enclosed space during the MRI test. Suppose 29% of all ...
*Sunday, June 23, 2013 at 9:50pm*

**statistics**

2. Bender electronics buys keyboards for its computers from another company. The keyboards are received in shipments of 100 boxes, each box containing 20 keyboards. The quality control department at Bender Electronics first randomly selects one box from each shipment and then ...
*Sunday, June 23, 2013 at 9:50pm*

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