Suppose that Rob is a quality control specialist at a toothpaste factory. Part of his job is to verify that the filling machines aredispensing the proper amount of toothpaste into each tube. It is his first day working on a new machine that fills travel sizetoothpaste tubes. The machine is calibrated with an average fill rate of 0.75 ounces of toothpaste per tube.Rob randomly samples 16 of the 1000 travel size tubes of toothpaste that the machine produces that day. The weight, inounces, of Rob's sample data is presented in the stem-and-leaf plot below. The stems are tenths of an ounce and the leaves arehundredths of an ounce.5 966778 3 4852 35 6 80 0 0 26 6 6Rob does not know the population standard deviation, so he decides to perform a one-sample t-test to determine if themachine is filling the tubes with the proper amount of toothpaste. Rob knows from past experience that the amount oftoothpaste dispensed by similar machines follows a normal distribution very closely. Repeated measurements taken by thesame device are usually normally distributed. He will assume that the amount of toothpaste dispensed by this machine isnormally distributed and will examine the sample data for evidence that this assumption might not be correct.His null and alternative hypotheses are Ho μ = 0.75 and H₁ µ ‡ 0.75, respectively.Is Rob's decision to use a t-test justified? Why or why not? Select all correct statements from the lists below.The requirements for performing a one-sample t-testThe sample was not known to be random.The sample data contain no outliers.The population is not normal or cannot be assumed to be normal.been met for the following reasons.The sample data contain at least one outlier.The sample was random.The sample size is too small.The population is normal or can reasonably be assumed to be normal.The sample size is large enough.

The objective is o define if the considered one-sample t-test is desired for testing the set-up…

Answered: The requirements for performing a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The third box options are greater than, not, equal to, and less than. I need in an hour pls help Thankyou.
Use the data and table below to test the indicated claim about the means of two paired populations (matched pairs). Assume that the two samples are each simple random samples selected from normally distributed populations. Make sure you identify all values. The table below shows the blood glucose of 20 IVC students before breakfast and two hours after breakfast, using a specific insulin dosing formula to cover carbohydrates. Is there compelling statistical evidence that the specific insulin dosing formula is effective in reducing blood glucose levels? Use a significance level of 0.05. Remember that once we have the mean, standard deviation, and sample size for the differences, we can apply methods that are used for a 1 sample t-test. Paired T for After - Before N Mean StDev After Before Difference 201.95 20 139.00 41.586 20137.05 37.760 59.137 Null Hypothesis, HO Alternative Hypothesis, H1 Test Statistic, t > >
The type of household for the U.S. population and for a random sample of 409 households from the community of Dove Creek, Montana, are shown (based on Statistical Abstract of the United States) in the table below. It is claimed that the distribution of Dove Creek households agrees with the U.S. distribution of households, that is all proportions are true in the distribution of Dove Creek households. Type of Household Percent of U.S. Households Observed number of Households in Dove Creek Married with children 26 % 101 Married, no children 29 % 111 Single parent 10 % 32 One person 27 % 97 Other (e.g. roommates, siblings) 8 % 68 A) The sample has degree of freedom:��= B) The expected count of the type of household "Married, no children" is:�= C) Accurate to 2 decimal places, the component value of the type of household "Married, no children" is:component= D) �2 value of this sample is:�2= E) At significance level 0.03, is the sample showing strong evidence to reject the…
Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years old. How large a sample size must be taken to make an estimate of the true proportion of citizens who favor this move? The error should be no more than 0.01 with 99% confidence. Select one: a. 16641 b. 167 c. 1670 d. 6450 e. 65
Explain why the following statement is incorrect. The sample space associated with an experiment is given by S={a,b.c}, where P(a)=D0.3, P(b)=0.4, and P(c)=0.4.
Suppose a certain Statistics instructor wants to estimate the proportion of students who enjoy taking online courses. What sample size must be obtained in order to be 90% confident that the population proportion, p, is within a margin of error of at most 0.03 from the estimate, .
The sales manager of a food company wants to determine if the weekly sales of 16 ounce packages of frozen broccoli has increased since last year. The mean weekly number of sales per store was 2,400 packages last year. The sales manager set the following hypotheses to test Hol=2400 H₁:H>2400 Available sales data are from 400 stores. Assume that this data set is a random sample. The sample mean is 2,430 and the sample standard deviation is 800. For the significance level of 5%, find the critical value. a) 2478.4 b) 2430 Oc) 2321.6 d) 2334.4 e) 2465.6
Which of the following decrease(s) power in hypothesis testing? A. Increasing the sample size. B. Decreasing αα level. C. Increasing the population variance. D. Increasing the difference in the means of the two conditions in an independent-samples design. E. A and D F. B and C G. B and D H. C and D
Consider the data below. Three random samples in different cities were selected. Water use per household per day were measured. Test the claim that the samples come from populations with the same mean. Assume all requirements have been met. Use a 5% level of significance. 1. Identify the tail of the test. [ Select ] 2. Find the P-value. [ Select ] 3. Will the null hypothesis be rejected? [ Select ] 4. Do the populations appear to have the same mean? [ Select ] Sample Data City 1 City 2 City 3 70 66 66 70 64 66 55 45 54 60 41 61 65 58 65 45 44 65 55 46
Which of the following is not a requirement for one-way ANOVA? ... A. The populations are approximately normally distributed B. The samples are independent of each other C. The populations have the same variance D. none of the other answers E. The populations have the same mean O F. The sample sizes from each population are the same
A personnel manager is concerned about absenteeism. She decides to sample employee records to determine if absenteeism is distributed evenly throughout the six-day workweek. The null hypothesis is: Absenteeism is distributed evenly throughout the week. The 0.01 level is to be used. The sample results are: Day of the Week Number of Employees Absent Monday 12 Tuesday 9 Wednesday 11 Thursday 10 Friday 9 Saturday 9 What kind of frequencies are the numbers 12, 9, 11, 10, 9, and 9 called? Multiple Choice: Expected frequencies Acceptance frequencies Observed frequencies Critical frequencies
q22- The problem with relying on a point estimate of a population parameter is that: Select one: a. it has no variance. b. it might be unbiased. c. it might not be relatively efficient. d. it does not tell us how close or far the point estimate might be from the parameter.

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