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. Determine the test statistic. Do not round until the final step. (round to nearest hundredth)
Suppose a study is conducted to test the claim, at a 0.05 significance level that a population proportion is 30%. A simple random sample 680 subjects has a proportion of 35%. Determine the test statistic. (round to nearest hundredths as needed).
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?
Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level. Treatment 1 Treatment 2 Treatment 3 3 9 6 2 6 3 5 5 5 1 6 5 3 8 5 1 5 4 4 1 7 5 6 4 a. State the null hypothesis and the alternate hypothesis. b. What is th
I am having a difficult time trying to figure out this problem about a random sample of 480 male and female adults which were asked the amount of time each person spent watching TV last week. Their responses are below. Gender of Viewer Hours Male Female Total Under 8 70 90 160 8 to 15
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
Jim owns three real estate offices in Anytown. He has decided to open one more office, but cannot decide between hometown or uptown as the towns where he wants to locate. He will be comparing the mean number of homes sold per real estate agent, and the mean commission percentage earned by agents in the two towns to make his dec
A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-between failures (MTBF). the manufacturer then changes a manufacturing process and produces another batch and again measures the MTBF. did the change to the process improve the MTBF? How do I determine if this is parametric or nonparametric?
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
Please show your work in Excel if possible. Hypothesis test for the difference of population means: Z test According to the historical data, the life expectancy in the United States is equal to the life expectancy in the United Kingdom. A new study has been made to see whether this has changed. Records of 200 individuals fro
Please include output so I can see the formulas. Please include Hypthoseses. Please complete the graph. File attached.
In a recent study, a researcher found that there is a negative correlation (r = -0.67) between changing your first answer on a standardized achievement test and test scores. Apparently, according to the study, students are changing the correct answers for incorrect ones. Based on this study, should you consider changing your ans
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
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
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.
What is the difference between the probability value and the significance level? Please, also provide examples.
Why do educational researchers usually use the .05 level of significance and what does this mean? Please also provide an example.
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
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
According to state government, the monthly incomes of college graduates have a standard deviation of $650. A county official believes that the standard deviation of monthly incomes is higher in her county. A sample of 71 college graduates are randomly selected and found to have a standard deviation of $700. a) Assuming th
A nationwide survey claimed that about 50% of parents with young children condone spanking their child as a regular form of punishment. A sociologist believes the proportion is different from this. In a random sample of 512 parents with young children, 275 admitted to spanking their child as a regular form of punishment. Use th
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
5. The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. The standard deviation of the mileage is 5,000 miles. The Crosset Truck Company bought 48 tires and found that the mean mileage for their trucks is 59,500 miles. Is Cross
14. The null and alternate hypotheses are: A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12. A random sample of 17 observations from the second population revealed a sample mean of 342 and a sample standard deviation of 15. At the .10 significanc
10. The manager of a computer software company wishes to study the number of hours senior executives spend at their desktop computers by type of industry. The manager selected a sample of five executives from each of three industries. At the .05 significance level, can she conclude there is a difference in the mean number of hou
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