Your local gas company is interested in estimating the average usage during the month of January. A random sample of 1280 households found the following results: X= 82 therms and s=28 therms. Conduct a test of hypothesis to determine if the average amount exceeds 80 therms. Use a=0.02.

Q: Which has more uniform pressure? If prices are the same, which manufacture’s bag would be preferred…

A: Dispersion measures the variation in a data set.

Q: For a population with a standard de 12, a score of X = 44 correspo What is the population mean? %3D

A:

Q: What happens when p value for t test is lower than alpha i.e. what do you conclude?

A: P-value or probability value: P-value or probability value method involves the probability of…

Q: A can of soda is labeled as containing 15 fluid ounces. The quality control manager wants to verify…

A: Let µ be the average amount of fluid filled by the machine. Test : Whether the filling machine is…

Q: s of cans of diet soda have weights with a mean that is less than the mean for the regular soda.…

A: Data on the weghts of contents of cans of diet soda : Sample size , n = 40. Sample mean , x̅ =…

Q: According to the American Pet Products Manufacturers Association, cat owners spend an average of…

A:

Q: Assume that you have an estimate w = 0.3 of a population parameter 0 and test the hypothesi Ho : 0 =…

A:

Q: You are in charge of assessing two different Malaria vaccines, to determine if one should be…

A:

Q: The amount of pollution produced by cars was measured for cars using gasoline containing different…

A: Explanation : Independent variable is nothing but if one variable that has not changed with the…

Q: "You computed statistical power for your experiment to be 0.7, what is the value of Beta (B)7:" Beta…

A:

Q: WUmens satisfaction with natural deodorants. (Round to the nearest whole person as needed). Is there…

A:

Q: The rare earth element gadolinium is often used as a contrasting agent for MRIS. The concentration…

A:

Q: The critical values associated with a 80% Cl for the population mean when x = 12.5, %3D n 13 and o…

A:

Q: . Two soft drink dispensing machines should dispense 8 oz of your selection into a cup. The table…

A: Two measures of dispersion variance and range has compared.

Q: As soon as possible! Let X and Y as below, a) Marginal PMFs PX(x) and PY (y). b) Expected…

A: Given

Q: In a hypothetical scenario, the National Institute of Standards and Technology has received a new…

A:

Q: The specification for the diameters of ball bearings is 15.40–15.60 mm. Data from an X chart, based…

A:

Q: A veterinarian claims that the mean weight of adult German shepherd dogs is 75 pounds.  The test…

A:

Q: A medical researcher says that less than 86% of adults in a certain country think that healthy…

A:

Q: Arandom sample of 450 observations produced a sample proportion equal to 0.38. Find the critical and…

A:

Q: The systolic blood pressure dataset (in the third sheet of the spreadsheet linked above) contains…

A: The variables x and y are average number of employees in a group health insurance plan and average…

Q: You conduct a statistical test of hypotheses and find that your data are statistically significant…

A: No , If we test the hypothesis at the α=0.05 level of significant and it may be significant, but we…

Q: Find the z-score associated with the ACT score X = 26 %3D Find the ACT score from the dataset…

A: Our aim is to find the following :  (a) Z-score for X=26 (b) ACT score for Z=1.064

Q: You have received a radioactive mass that is claimed to have a mean decay rate of at least 1…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: For a given set of bivariate data, the following results were obtained. X- 53.2, Y= 27.9, Regression…

A: Given information: X¯=53.2Y¯=27.9Regression coefficient of Y on X=-1.5bYX=-1.5Regression coefficient…

Q: For parts a and b​, use technology to estimate the following. ​a) The critical value of t for a…

A: Given For a) Df=4 For  b) Df=111

Q: Compute the relative risk for a smoker compared to a non-smoker. Round to two decimal places.…

A: Introduction: Consider smoking as the predictor or exposure variable. It has two levels- yes for…

Q: For each problem, a) identify the null and alternative hypothesis, b) find the critical value and…

A: (a) The null hypothesis is a simple statement about the value of the population parameter which is…

Q: Changing alpha from .05 to .10 increases the risk of a Type I error. true or flase?

A: Type I error is rejecting null hypothesis when it is true. It is also called level of significance,…

Q: If a person is making the third quartile salary for a CPA, they are making less than 50 V o 50 % of…

A: It is a graph that shows five number summaries of the data. Minimum, first quartile, median, third…

Q: Repeat the process that you performed on the last problem for a) samples of size 20. Note the SE of…

A: From the given information we find the standard error and compare for sample size .

Q: A law enforcement organization claims that their radar gun is accurate to within 0.5 miles per hour…

A: Given data: 63, 61.5, 59, 63.5, 57.5, 61.5, 61, 63, 60, 60.5, 64, 62 μ=60

Q: The electric car company also wants to control the quality of the current battery manufacturing…

A: Given information: The data represents the values of the variables Lithium-ion and Lead-acid.

Q: A population with a mean of μ = 8 has SX = 40. How many scores are in the population?

A: It is given that, the population mean is µ = 6 and ΣX = 40.

Q: A series of tests of fire prevention sprinkler systems that use a foaming agent to quell the fire…

A: Computation of test statistic value: Sample size is smaller than 30 and the population standard…

Q: The average American consumes 9.4 liters of alcohol peryear. Does the average college student…

A: Given data, Mean μ=9.4

Q: Two different methods can be used for measuring the temperature of the solution of a Hall cell used…

A: The independent variable is Thermo couple. The dependent variable is IR. We have do regression…

Q: For a population with µ = 40 and σ = 8, what is the X value corresponding to z = 1.50?

A: It is given that the mean is 40 and the standard deviation is 8.

Q: observed t-value for the hypothesis test of Ho: m < .36 .42 .33

A: The null and alternative hypothesis is, H0:m≤115Ha:m&gt;115 Given:M=111m=115σ=12.4n=41 The formula…

Q: 10. A pharmacist attempts to weigh 120 mg of codeine sulfate on a balance with a sensitivity…

A:

Q: Derive fhe mean and he Variance of X~ Beta Ca, p).

A:

Q: (c) We want to test if there is a (positive) reduction in annual gas consumption provided by the…

A: For testing the assumed claim that two population means (i.e., "the true mean annual gas consumption…

Q: Use the empirical rule to choose the best value for the percentage of the area under the curve that…

A: here given mean = 41.8 cm  and standard deviation = 5.3 cm

Q: The test statistic is t = 1.34, the critical value is t = 2.011. The decision would be to: Reject…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: Scores on an accounting exam ranged from 42 to 92, with quartiles Q1= 59.00, Q2= 79.0, and Q3=82.25.…

A: (a) Procedure for constructing boxplot: The x-axis represents the units of data values ranging from…

Q: A sample of patients is tested to determine if they have any hospital borne infections. How large of…

A: The random variable X follows normal distribution. We have to find the sample size. This is z-test…

Q: Anthony wants to estimate the mean weight, in kilograms, of all Grade 1 pupils in an elementary…

A: Given information, The level of significance is,

Q: In a series of tests (see data table below), 15 rolls of wrap are made under carefully controlled…

A: Solution: X (X-X) (X-X)2 134 2.066667 4.271111 131 -0.93333 0.871111 129 -2.93333 8.604444…

Q: Fill out the table below and calculate the y statistic and degrees of freedom. Blackjack Preserve…

A: The Chi square χ2 test statistic formula is defined as below         χ2=∑Oi-EI2EI Where, Oi is the…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.