Please see attached file for full problem description. Please help with the areas in red, thanks! Frequency Hypothesis Test #4) Does it seem to you that people tend to be absent more on some days of the week than on others? Recently, a major biotechnology firm collected data with the hope of determining whether or not it
The average gasoline price of one of the major oil companies has been $2,25 per gallon. Recently, the company has undertaken several efficiency measures in order to reduce prices. Management is interested in determing whether their efficiency measures have actually reduced prices. That is, the alternative hypothesis is that
The McCollough Corporation, a producer of various kinds of batteries, has been producing D size batteries with a life expectancy of 87 hours. Due to an improved production process, the management believes that there has been an increase in the life expectancy of their D size batteries. A sample of 36 batteries showed an averag
Test of hypothesis: At 95% confidence, test to determine whether or not the lathe is in perfect adjustment.
A lathe is set to cut steel bars into lengths of 6 centimeters. The lathe is considered to be in perfect adjustment if the average length of the bars it cuts is equal to 6 centimeters. A sample of 25 bars is selected randomly, and the lengths are measured. It is determined that the average length of the bars in the sample is
Statistical Significance - You are a researcher who is interested in the effect of child care on the attachment which develops between an infant and a caregiver.
You are a researcher who is interested in the effect of child care on the attachment which develops between an infant and a caregiver. You believe that infants in child care will be insecurely attached at 11 months after being in child care from 2 months of age, compared with infants who are cared for at home by their mother
1. A researcher wants to investigate the effects of prenatal alcohol on birth weight. A random sample of n = 16 pregnant rats is obtained. The mother rats are given daily doses of alcohol. At birth, one pup is selected from each litter to produce a sample of n = 16 newborn rats. The average weight for the sample is 15 grams. The
The data in the attachment below represents the weight (mass) gained by 50 corn plants over a 3 week period
The data in the attachment below represents the weight (mass) gained by 50 corn plants over a 3 week period. 10 plants each were given growth stimulators (labeled A, B, C, and D) and 10 plants were given no stimulator(that treatment is labeled S). Use the one-way anova capabilities of Excel to determine whether there ar
(a) state the decision rule, (b) compute the pooled estimate of the population variance, (c) compute the test statistic, (d) state your decision about the null hypothesis, and (e) estimate the p-value. The null and alternate hypotheses are: Ho: µ1 = µ2 Ha: µ1 ≠ µ2 Please use the five-step hyp
Assume that a sample random sample has been selected from a normally distributed population. Find the test statistic, a range of numbers for the p-value, critical value, and state the final conclusion. Claim: The mean bottom temperature of a fish breeding pond is less than 20.0 Celcius Sample Data: n=61 X(with a line on top)
In a study of check out scanners, 5 of 675 items were found to be overcharges, test at the 0.05 significance level, the claim that with scanners, 5% of sales are overcharges.
In a study of check out scanners, 5 of 675 items were found to be overcharges, test at the 0.05 significance level, the claim that with scanners, 5% of sales are overcharges. Determine the test statistic. Do not round until the final step. (round to nearest hundredth)
Two-Tailed Hypothesis Test - Differences between out of pocket costs between in-network and out-of-network dental plans.
THE PROBLEM: This week we would like to perform a two-tailed test and use the .05 significance level, estimate the p-value, and interpret it to determine differences between out of pocket costs between in-network and out-of-network dental plans. The following chart is dental members and the values are dollars out of pocket e
Let Z be a standard normal random variable. Determine the value of c such that P (Z > c) = 0.1251 is there a way to do this step by step so i can understand it?
Assume that a hypothesis test of the given claim will be conducted. The college Dean of Admissions claims that the times students require to earn a bachelors degree have a mean less than five years. Which equality/inequality (e.g., =, =<, etc.) would use in the Null Hypothesis? Assume that a hypothesis test of the giv
Need to know what statistical test to perform as well as the test actually performed. If a program is used need scanned copy of printout and if by hand, need explanation. Additionally, I would like a brief explanation about the test and why it was chosen. It is not a homework problem but something I need to test experimental
1. The mean age of bus drivers in Chicago is 54.5 years. If a hypothesis test is performed, how should you interpret a decision that fail to rejects the null hypothesis? A There is sufficient evidence to reject the claim mean = 54.5 B There is not sufficient to reject the claim mean = 54.5 C There is sufficient evidence to
The end of the year can be a time of rejoicing, a time of business, and a time of confusion. For most employers, it is a time to conduct open enrollment for its employees. For employers and employees, this can be a very confusing time with all of the options made available for the health care industry. The summary detailed be
Please show in Excel spreadsheets 1) The restaurant chain claims that the waiting time of customers for service is normally distributed, with a mean of 3 minutes and a stdev of 1 minute. The quailty assurance department found in a sample of 50 customers at another place that the mean waiting time was 2.75 minutes. At a .05
A study was conducted to determine the effects of sleep deprivation on student's ability to solve problems.
Please see attached file for full problem description. A study was conducted to determine the effects of sleep deprivation on student's ability to solve problems. The amount of sleep deprivation varied over 8, 12, 16, 20, and 24 hours without sleep. A total of ten subjects participated in the study, two at each deprivation le
A manager of the credit department for an oil company would like to determine whether the average monthly balance of credit card holders is equal to $75.
Please provide a brief explanation if possible of how to arrive at these answers. Please see attached file for full problem description. 1. Suppose we wish to test H0: 47 versus H1: > 47. What will result if we conclude that the mean is greater than 47 when its true value is really 52? a) We have made a Type I error.
1. A company has two different processes that make credit cards. Suspecting that machine B has a higher variability than machine A the manager orders a test to be run. The following data was collected: Machine A Machine B Sample size nA= 30 nB=40 Sample Standar
Statistics indicates that the average female literacy rate for 109 countries of the world was 67.3 percent in 1995, with a standard deviation of 28.6.
Assignment 10 Questions. Statistics 1. Statistics indicates that the average female literacy rate for 109 countries of the world was 67.3 percent in 1995, with a standard deviation of 28.6. The average male literacy rate for the world was 78.7%, with a standard deviation of 20.4. a) The female literacy rate in Nicaragua w
1. The share of the national car manufacturers market in South Africa is shown in the table below: MANUFACTURER % OF SHARES VW 37 Toyota 30 Delta 15
A large discount chain compares the performance of its credit managers in Ohio and Illinois by comparing the mean dollar amounts owed by customers with delinquent charge accounts in these two states.
1. A large discount chain compares the performance of its credit managers in Ohio and Illinois by comparing the mean dollar amounts owed by customers with delinquent charge accounts in these two states. Two random samples of 10 delinquent accounts are selected from all delinquent accounts in Ohio and Illinois. The sample of O
A sample mean, sample size, and population standard deviation are given. Use the P-value approach to perform a one-mean z-test about the mean of the population from which the sample was drawn. x bar= 78, n = 28, sigma = 11, Hnought: mu=72, Hone: mu>72 , alpha = 0.01 First find the proper z value then use this to find the
A pollution-control inspector suspected that a riverside community was releasing semitreated sewage into a river and this, as a consequence, was changing (reducing) the level of dissolved oxygen of the river.
A pollution-control inspector suspected that a riverside community was releasing semitreated sewage into a river and this, as a consequence, was changing (reducing) the level of dissolved oxygen of the river. To check this, he drew 15 randomly selected specimens of river water at a location above the town and another 15 specime
Statistics questions. Please open word document. Missing details attached (got to do with optimal sample size (n)). Thanks. ----------------------------------- Select the correct answer (letter) to the question from the list of answers on the next page. 1. The ________ is the probability of observing a sample value a
One reads that a business school graduate with an undergraduate degree earns more than a high school graduate with no additional education, and a person with a master's degree or a doctorate earns even more. To investigate we select a sample of 25 mid-level managers of companies with less than 200 employees. Their incomes, class
Consolidated Power, a large electric power utility, has just built a modern nuclear power plant. This plant discharges waste water that is allowed to flow into the Atlantic Ocean. The Environmental Protection Agency has ordered that the waste water may not be excessively warm so that thermal pollution of the marine environment n
Determine the standardized test statistic to test the claim about the population proportion 'p' is 0.325 given n=42 and p-hat=0.247, use alpha=0.05
Indicate the statistical test, the degrees of freedom, the level of significance, the region of rejection, the critical value, the calculated value of the test statistic, and the probability. Situation A The number of new US book titles increased from almost 47,000 in 1990 to over 48,000 in 1991. However, this was still bel