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December 21, 2014

Homework Help: Math: Statistics

Recent Homework Questions About Statistics

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Statistics
For a population with a mean of µ=60 and standard deviation of Ợ=24, find the z=score corresponding to each of the following samples a. M=63 for sample of n=16 scores b. M=63 for sample of n=36 scores c. M=63 for sample of n=64 scores
Friday, December 13, 2013 at 7:12pm

statistics
what is the variance of 18, 16, 12, 2, 11
Friday, December 13, 2013 at 6:12pm

Statistics
Scores on a certain exam are normally distributed with a mean of 78 and a variance of 25. What is the score obtained by the top 5% of the students? I do not understand the 5% part. What does the tail look like on the bell-shaped graph?
Friday, December 13, 2013 at 4:03am

Statistics
True or False The mean for a sample of n = 4 scores has a standard error of 5 points. This sample was selected from a population with a standard deviation of ċ = 20.
Thursday, December 12, 2013 at 10:19pm

Statistics
True or False As sample size increases, the value of the standard error also increases.
Thursday, December 12, 2013 at 10:18pm

mah statistics
the following table gives the number of camcorders sold on a given day in an electronics store X: 0, 1, 2, 3, 4, 5, 5, P(x) 0.5, .12, .23, .3, .16, .1, .04 find the mean, variance, and standard deviation of the daily sales of camcorders in the store.
Thursday, December 12, 2013 at 6:52pm

Statistics
How is the rejection region defined and how is that related to the z-score and the p value? When do you reject or fail to reject the null hypothesis? Why do you think statisticians are asked to complete hypothesis testing? Can you think of examples in courts, in medicine, or ...
Thursday, December 12, 2013 at 12:16am

Statistics
Can someone help me do this problem? A group of environmentalist are trying to estimate the population of the state rid in clear view park. They capture a sample of 500 birds in early spring and tag them. in august they capture 215 birds, of which 20 are tagged. a) use the ...
Thursday, December 12, 2013 at 12:12am

Statistics
True or False According to the central limit theorem, the expected value for a sample mean becomes smaller, approaching zero, as the sample size approaches infinity.
Wednesday, December 11, 2013 at 9:39pm

Statistics
True or False In order for the distribution of sample means to be normal, it must be based on samples of at least n = 30 scores.
Wednesday, December 11, 2013 at 9:39pm

Statistics
Multiple choice question that's hard to figure out and understand.(information provided) Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course: 61,74,47,60,62,63,65,79,55,85. The question states: In all, 135 students ...
Tuesday, December 10, 2013 at 11:52am

statistics
Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course. 61,74,47,60,62,63,65,79,55,85. In all 135 students took the exam. The third quartile for all 135 scores was 69. How many students had scores higher than 69?
Monday, December 9, 2013 at 9:17pm

STATISTICS
Program evaluation differs from policy analysis with respect to _____. a. the time dimension within the policy process b. the cost c. the time d. the role of the stakeholder
Monday, December 9, 2013 at 9:00pm

Statistics
True or False If a sample of at least 30 scores is randomly selected from a normal population, the sample mean will be equal to the population mean.
Monday, December 9, 2013 at 7:48pm

Statistics
A sample of n = 9 scores is obtained from a population with ƒÝ = 70 and ƒã = 18. If the sample mean is M = 76, then what is the z-score for the sample mean? a. z = 0.33 b. z = 0.50 c. z = 1.00 d. z = 3.00
Monday, December 9, 2013 at 7:32pm

STATISTICS HELP
A student wishes to test the accuracy of the measuring jug she is using in an experiment. The label on the jug claims that it measures volume to an accuracy of plus or minus 5 cm3. The density of water is about 0.999 g cm−3, which means that 100 cm3 of water should have ...
Monday, December 9, 2013 at 8:17am

Statistics
Suppose that you visit Shire, and find that 28% of Hobbits believe in the existence of Elves, 16% believe in the existence of Ents, and 9% believe in the existence of both Elves and Ents. You come across a Hobbit: i) What is the probability that he will believe in Ents given ...
Sunday, December 8, 2013 at 10:54pm

Psychological Statistics
Post a behavioral research situation that could use a Pearson coefficient research study and a chi square research study. Present the rationale for each selection. Be very specific in your presentation.
Sunday, December 8, 2013 at 4:33pm

Statistics
The probability of Joe is at work is 49%. The probability Joe is at home is 25%. What is the probability Jow is neither at Work nor at home? A) 39% B)74% C)52% D)26% I get the answer at about 38%,but doesn't round to 39%, can anyone help, I'm stuck.
Sunday, December 8, 2013 at 4:02pm

Statistics
How would you find the z-score for the following X=86 and the n=17.
Sunday, December 8, 2013 at 1:28pm

Business Math and Statistics
You deposit $1,000 for 4 years at an interest rate of 2.0%. If the interest is compounded annually, how much money do you have after 4 years?
Sunday, December 8, 2013 at 1:33am

Statistics
Find the Standard Deviation for this distribution of scores. Then find the z score for X=86. N=17 98, 92, 86, 84 , 76, 74 , 72 , 72, 72 , 70, 70, 66, 60 ,54, 32,30
Saturday, December 7, 2013 at 9:02pm

STATISTICS
Two-thirds of papaya plants availabe are hermaphrodite and are self-pollinating. One-third of plants are female and need to be paired withh an hermaphrodite plant in order to be pollinated. Unless the plants are pollinated, they will not bear fruit. If you select three papaya ...
Saturday, December 7, 2013 at 6:06pm

Healthcare Statistic
Given the following null hypothesis, give an example of a Type II error. H0: There is no difference in the level of understanding of this chapter between students who have previously taken a statistics course and students who have not previously taken a statistics course.
Saturday, December 7, 2013 at 5:50pm

Statistics
Two-thirds of papaya plants availabe are hermaphrodite and are self-pollinating. One-third of plants are female and need to be paired withh an hermaphrodite plant in order to be pollinated. Unless the plants are pollinated, they will not bear fruit. If you select three papaya ...
Saturday, December 7, 2013 at 4:21pm

Easy Statistics
The probability Joe is at work is 49%,. The probability Joe is at home is 25%. What is the probability Joe is neither at work nor at home? a) 39% b)74% c)52% d) 26% *I personally think it is a or c. I am just needing some help thanks!
Friday, December 6, 2013 at 9:22pm

statistics
Nine students took the SAT. Their scores are listed below. Later on, they read a book on test preparation and retook the SAT. Their new scores are listed below. Construct a 95% confidence interval for µ d (the true mean difference in scores). Assume that the distribution...
Friday, December 6, 2013 at 3:39pm

statistics
The espresso project you are heading up will do well with probability 0.80. Given that it does well, you believe that the herbal tea project is likely to do well with probability 0.70.However, if the espresso project does not do well, then the herbal tea project has only a 25...
Friday, December 6, 2013 at 9:13am

Statistics
Draw a vertical line through a normal distribution for each of the following z-score locations. Determine whether the body is on the right or left side od the line and find the proportion in the body. a. z= 2.20 b. z= 1.60 c. z= -1.50 d. z= -0.70
Friday, December 6, 2013 at 12:47am

Statistics
Draw a vertical line through s normal distribution for each of the following z-score locations. Determine whether the tail is on the right or left side of the line and find the proportion in the tail. a. z=2.00 b. z=0.60 c. z= -1.30 d. z= -0.30
Friday, December 6, 2013 at 12:43am

Statistics
A normal distribution has a mean of ƒÝ = 100 with ƒã = 20. If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 90 and X = 110? a. 0.6915 b. 0.3085 c. 0.1915 d. 0.3830
Thursday, December 5, 2013 at 8:16pm

Statistics
Given the following information, determine the 68.3 percent, 95.5 percent, and 99.7 percent confidence intervals. overbar above X equals 4.33 comma SE sub m equals 3 I've looked at the table as recommended. I just do not understand this at all. I'm really lost on this ...
Thursday, December 5, 2013 at 11:54am

Statistics
True or False For any normal distribution, the proportion in the tail beyond z = 2.00 is p = 0.0228.
Thursday, December 5, 2013 at 7:01am

Statistics
True or False A jar contains 15 red marbles and 75 blue marbles. If you randomly select a marble from this jar, the probability of obtaining a red marble is p = 15/90.
Thursday, December 5, 2013 at 7:00am

Statistics
True or False One requirement of a random sample is that every individual in the population has an equal chance of being selected.
Thursday, December 5, 2013 at 6:59am

Statistics
True or False The value for a probability can never be less than zero, unless you have made a computational error.
Thursday, December 5, 2013 at 6:56am

Statistics
True or False All probabilities can be expressed as decimal values ranging from 0 to 1.00.
Thursday, December 5, 2013 at 6:54am

AP Statistics
A standard deck of cards consisting of 52 cards, 13 in each of 4 different suits, is shuffled, and 4 cards are drawn without replacement. What is the probability that all four cards are of a different suit?
Wednesday, December 4, 2013 at 8:24pm

statistics
I have just a couple questions I have trouble understanding... can someone please help me? The data below indicate the rankings of a set of employees according to class theory and on-the-job practice evaluations: Theory 1 7 2 10 4 8 5 3 6 9 Practice 2 8 1 7 3 9 6 5 4 10 What ...
Wednesday, December 4, 2013 at 2:22pm

Statistics
Your program plans to acquire a total of 600 end items costing $535 million over a five-year period. The first production contract is to be awarded in FY04. The number of items to be procured (not delivered) each year and their estimated cost (in then-year dollars) is shown ...
Tuesday, December 3, 2013 at 10:03pm

statistics
The average for the statistics exam was 72 and the standard deviation was 4. Kelsey was told by the instructor that she scored 1.85 standard deviations below the mean.
Tuesday, December 3, 2013 at 4:23am

statistics
The HIM department at community hospital will experience a 15 percent increase in the number of discharges coded per day as a result of opening a cardic clinic in the facility. The 15 percent increase is projected to be 100 additional records per day. The standard time to code...
Tuesday, December 3, 2013 at 4:05am

Statistics
community physicians clinic is a large clinic with 85 physicians. they treat about 8,600 patients each week. coders are expected to code 100 clinic records each day. how many Full Time Employees are needed to code these records? ( assume a five day work week)
Monday, December 2, 2013 at 7:41am

STATISTICS
To calculate the mean for grouped data, which of the following steps must be completed? a. multiply the number of subjects within each category by the value of that category b. divide the results of the multiplication c. multiply by the number of subjects d. multiply each ...
Monday, December 2, 2013 at 5:32am

Statistics
smith is a weld inspector at a shipyard. he knows from keeping track of good and substandard welds that for the afternoon shift 5% of all welds done will be substandard. If Smith checks 300 of the 7500 welds completed that shift, would it be unusual for Smith to find 30 or ...
Sunday, December 1, 2013 at 10:21pm

Statistics
1. The Chi-square distribution, used in the Chi-square test of independence, varies in shape by degrees of freedom. What does the Chi-square distribution look like for 4 degrees of freedom. A) Unimodal and symmetric. B) Bimodal and symmetric. C) Unimodal and skewed to the left...
Sunday, December 1, 2013 at 8:14pm

Statistics
Explaining confidence. A student reads that a 95% confidence interval for the mean ideal weight given by adult American women is 140 ± 1.4 pounds. Asked to explain the meaning of this interval, the student says, “95% of all adult American women would say that ...
Sunday, December 1, 2013 at 8:09pm

Statistics
Suppose 5 cards are drawn, without replacement, from a standard bridge deck of 52 cards. Find the probability of drawing 4 clubs and 1 non- club.
Sunday, December 1, 2013 at 4:26pm

Statistics 2
To calculate the mean for grouped data, which of the following steps must be completed? a. multiply the number of subjects within each category by the value of that category b. divide the results of the multiplication c. multiply by the number of subjects d. multiply each ...
Sunday, December 1, 2013 at 2:05pm

Statistics 1
Professor White asked his students to put the number of hours each studied for the final exam on a piece of paper and turn that paper in with the exam. The pieces of paper indicate that students studied 10, 3, 4, 25, 1, 4, 4, 12, 6, 8, and 10 hours. What is the mean number of ...
Sunday, December 1, 2013 at 2:03pm

elementary statistics
A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below). At 0.05 alpha level can it be conculded that the variance...
Saturday, November 30, 2013 at 10:30pm

Statistics
Of the parts produced by a particular machine, 1.5% are defective. If a random sample of 11 parts produced by this machine contains 2 or more defective parts, the machine is shut down for repairs. Find the probability that the machine will be shut down for repairs based on ...
Saturday, November 30, 2013 at 9:55pm

Probability and Statistics
The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not reject the null ...
Saturday, November 30, 2013 at 8:06pm

elementary statistics
A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below). At 0.05 alpha level can it be conculded that the variance...
Saturday, November 30, 2013 at 7:44pm

statistics
Ala rge fleet of cars is maintained with an average of 26 mpg. 50 recent trips displayed a mean of 25.02 mpg and standard deviation of 4.1 mpg. At the 5% level of significance, is their evidence the company has failed to keep their fuel goals? I did the math and got .03380315...
Saturday, November 30, 2013 at 12:27pm

Probability and Statistics
The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not reject the null ...
Saturday, November 30, 2013 at 1:50am

Statistics
I have two coins: a quarter and a nickel. The quarter has a bias of 1/4 for heads, and the nickel has a bias of 2/3 for heads. I flip each coin 10 times. What is the probability that I observe exactly five heads total? Some explanation of the solution would be appreciated.
Friday, November 29, 2013 at 11:04pm

Statistics
Hello, my problem is I have a random sample of only 15 sales average is $115 with a known population standard deviation of $25.00. Obtain a 92% confidence interval and explain what your answer means. I am not sure what to do because the sample size is only 15. Thanks for your ...
Friday, November 29, 2013 at 8:00pm

Probability and Statistics
The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not reject the null ...
Friday, November 29, 2013 at 7:30pm

statistics
In a distribution of sentence lengths in months like the following: 6, 12, 10, 18, 24, 360; which statistic would a researcher not want to report? a. standard deviation b. mean c. range d. raw numbers
Friday, November 29, 2013 at 8:13am

Probability and Statistics
The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not reject the null ...
Thursday, November 28, 2013 at 5:13pm

Probability and Statistics
The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not reject the null ...
Wednesday, November 27, 2013 at 11:34pm

Statistics
A statistics professor plans her classes so carefully that the lengths of her class are uniformly distributed between 46.0 and 56.0 minutes. Find the probablity that given class period runs less than 51.75 minutes
Wednesday, November 27, 2013 at 3:47am

Statistics
A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study, 449 babies were born, and 250 of them were girls. Use the sample data with .01 significance level to test the claim that with this method, the probability of a baby being a...
Tuesday, November 26, 2013 at 6:03pm

statistics
A particular country has 55 total states. If the areas of 30 states are added and the sum is divided by 30, the result is 196,582 square kilometers. Determine whether this result is a statistic or a parameter and why.
Tuesday, November 26, 2013 at 1:02pm

statistics
With n=13 and p= 0.7, find the binomial probability p(9) by using a binomial probability table. If np> and nq> 5, also estimate the indicated probability by using the normal distribution as an approximation to the binomial, if np<5 or nq<5 then state that the ...
Monday, November 25, 2013 at 9:36pm

Statistics
An industrial psychologist has a stress test that is used to determine the amount of stress that managers are under. A value of 80 or higher indicates “high stress.” The industrial psychologist believes that the managers at a large, profitable pharmaceutical firm are...
Monday, November 25, 2013 at 5:22pm

statistics
In a study of caffeine and stress, college students indicate how many cups of coffee they drink per day and their stress level on a scale of 1-10. The data appear below. Number of Cups of Coffee Stress Level 3 5 2 3 4 3 6 9 5 4 1 2 7 10 3 5 = 3.88 X= 5.13 s = 2.03 s = 2.90 ...
Monday, November 25, 2013 at 3:36pm

statistics psy/315
Based on the information given for each of the following studies, decide whether to reject the null hypothesis.For each, give (a) the Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected(b) the Z score on the comparison ...
Monday, November 25, 2013 at 11:12am

statistics
A clinical trial tests a method designed to increase the probability of conceiving a girl. In a study 306 babies were born, and 174 of them were girls. the sample data with a 0.01 significance level to test the claim that with this method, the probability of being a girl is ...
Monday, November 25, 2013 at 10:25am

Statistics
n two separate studies, the actual difference between the means of a treated group and an untreated group is 3 points. However, in one study, the σM1-M2 is very large and so the 3 points is not found to be significant. In the other study, the σM1-M2 is ...
Monday, November 25, 2013 at 7:18am

statistics
how would you tell deviations from normality by looking at a box plot?
Sunday, November 24, 2013 at 7:11pm

statistics
how would you tell deviations from normality by looking at a box plot?
Sunday, November 24, 2013 at 7:08pm

statistics
what makes a probability plot non-normal? I would think outliers are one of them, but what else?
Sunday, November 24, 2013 at 7:06pm

Statistics
Given the following information, determine the 68.3 percent, 95.5 percent, and 99.7 percent confidence intervals. overbar above X equals 4.33 comma SE sub m equals 3 I would appreciate it extremely if someone would help me figure this out. I honestly have no idea how to do ...
Sunday, November 24, 2013 at 6:33pm

statistics
Typing speeds among college students are normally distributed with a mean of 60 words, and a standard deviation of 10 words. determine the typing speed that separates the top 6% typists from the rest.
Sunday, November 24, 2013 at 3:55pm

statistics
1. A professor measured the time (in seconds) required to catch a falling meter stick for 19 randomly selected students’ dominant and non-dominant hand. The professor claims that the reaction time in an individual’s dominant hand is less than the reaction time in ...
Sunday, November 24, 2013 at 3:33pm

Statistics
142 out of 507 people were right. Calculate a 95% confidence interval for the proportion of the entire population that could be right. I did some of the work …Please help. I am getting .0199 SD =sqt(.28(1-.28)/506 = .0119 so .28 +/- .0119 so I could say that with 95% ...
Sunday, November 24, 2013 at 3:08pm

Statistics
142 out of 507 people were right. Calculate a 95% confidence interval for the proportion of the entire population that could be right. I did some of the work and got .72...don't know what to do with this? Please help.
Sunday, November 24, 2013 at 1:45pm

Statistics
A sample of 11 observations taken from a normally distributed population produced the following data. −7.1 10.3 8.7 −3.6 −6.0 −7.5 5.2 3.7 9.8 −4.4 6.4 a) What is the point estimate of μ? b) Make a 95% confidence interval for μ. c) What ...
Sunday, November 24, 2013 at 12:25pm

Statistics
Many dairy cows now receive injections of BST, a hormone intended to spur greater milk production. A group of 53 Jersey cows increased average milk production from 43 to 52 pounds per day, with a standard deviation of 4.8 lbs. Is this evidence that the hormone maybe effective ...
Sunday, November 24, 2013 at 9:14am

statistics
For the past 20 years, the high temperature on April 15th has averaged  = 62 degrees with a standard deviation of  = 12. Last year, the high temperature was 68 degrees. Based on this information, which of the following best describes last year's temperature...
Sunday, November 24, 2013 at 2:42am

Statistics
Exercise 8.92 Tony's Pizza guarantees all pizza deliveries within 30 minutes of the placement of orders. An agency wants to estimate the proportion of all pizzas delivered within 30 minutes by Tony's. What is the most conservative estimate of the sample size that would...
Saturday, November 23, 2013 at 6:10pm

Statistics
Tony's Pizza guarantees all pizza deliveries within 30 minutes of the placement of orders. An agency wants to estimate the proportion of all pizzas delivered within 30 minutes by Tony's. What is the most conservative estimate of the sample size that would limit the ...
Saturday, November 23, 2013 at 6:08pm

statistics
If the average commute time is 10.9 miles, but the average is actually the mean of a sample of 300 commuters and the sample standard deviation is 6.2 miles Estimate the true mean commute distance using 99% confidence level.
Saturday, November 23, 2013 at 3:00pm

Statistics
125/500 women soda drinkers indicate they drink diet soda. At the .01 level, does this evidence indicate that more than 20% of the women soda drinkers drink diet soda? Determine and explain the P-value please. I have the numbers...just cannot explain. Please help.
Saturday, November 23, 2013 at 2:51pm

statistics
Failing to reject the null hypothesis when it is false is a Type II Error. T or F, and why or why not?
Saturday, November 23, 2013 at 10:30am

statistics
IQ scores were obtained from randomly selected couples.For 20 such pairs of people, the linear correlation coefficient is 0.881 and the equation of the regression line is y= -6.93+ 10.8x, where x represents the IQ score of the husband. Also, the 20x values have a mean of 105....
Saturday, November 23, 2013 at 8:42am

statistics
Assume that thermometer readings are normally distributed with a mean of 0.0 and a standard deviation of 1,00. the thermometer is randomly selected and tested. For the case below, draw a sketch , and find the probability of the reading The given values in Celsius degrees) ...
Friday, November 22, 2013 at 2:09pm

statistics
Is there a significant difference between first year post college incomes of graduates from public versus private institutions? Provide the IV, DV, and best method of analysi
Thursday, November 21, 2013 at 9:41pm

Statistics
Many dairy cows now receive injections of BST, a hormone intended to spur greater milk production. A group of 53 Jersey cows increased average milk production from 43 to 52 pounds per day, with a standard deviation of 4.8 lbs. Is this evidence that the hormone maybe effective ...
Thursday, November 21, 2013 at 7:31pm

Statistics
If the cases selected for one sample have no influence upon the cases selected for a second sample, then the samples are said to be: A) independent B) inconsistent C) dependent D) consistent A
Thursday, November 21, 2013 at 7:27pm

Statistics
The effectiveness of a headache medicine is tested by measuring the intensity of a headache in patients before and after drug treatment. The data consist of before and after intensities for each patient. Identify the design of the study. A) Paired t-test B) Two-sample t-test C...
Thursday, November 21, 2013 at 6:40pm

Statistics
A researcher wished to test the effect of the addition of extra calcium to yogurt on the "tastiness" of yogurt. Two different yogurts, one with extra calcium and one without the added calcium, were created from the same batch of yogurt. A group of 84 adult volunteers...
Thursday, November 21, 2013 at 6:39pm

statistics 201
A firm hires a pool of financial consultants to discuss portfolio recommendations with its clients. The CEO believes that another financial consultant should be hired if the average phone consultation exceeds 350 seconds. A random sample of 100 phone calls revealed a mean of ...
Thursday, November 21, 2013 at 2:48pm

Statistics
The standard deviation for a population is σ = 15.3. A sample of 36 observations selected from this population gave a mean equal to 74.8. a) Make a 90% confidence interval for μ b) Construct a 95% confidence interval for μ. c) Determine a 99% confidence interval...
Thursday, November 21, 2013 at 11:11am

Statistics
Given the following null hypothesis, give an example of a Type II error. Ho: There is no difference in the level of understanding of this chapter between students who have previously taken a statistics course and students who have not previously takn a stastics course.
Thursday, November 21, 2013 at 9:55am

Statistics
given the following null hypothesis, give an example of a type I error. Ho: There is no difference between the number of males or females who go to their primary care physician for an annual exam.
Thursday, November 21, 2013 at 9:53am

Statistics
given the following information, determine the 68.3 percent, 95.5 percent, and 99.7 percent confidence intervals. Mean = 4.33, standard error of the mean =3
Thursday, November 21, 2013 at 9:46am

Statistics
Create a null hypothesis for the following research questions: a. What are the differences between emergency room shifts on medication errors? b. On a clinical trial of a new drug, what will be the effects over a currently used drug?
Thursday, November 21, 2013 at 9:41am

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