3. A small bakery sells cookies in packages of 500 g. The cookies are handmade and thepackaging is either done by the baker himself or his wife. Some customers conjecturethat the wife is more generous than the baker. One customer does an experiment: hebuys packages of cookies packed by the baker and his wife on 16 different days andweighs the packages. He gets the following two samples (one for the baker, one for hiswife).Weight (wife) (X) 512 530 498 540 521 528 505 523Weight (baker) (Y) 499 500 510 495 515 503 490 511Test whether the complaint of the customers is justified or not. Table value of t for 14d.f at 5% level of significance is ttab=2.145Worth 4 Marks

First, we need to calculate the mean (average) of the two samples. The mean is calculated by summing…

Answered: 3. A small bakery sells cookies in…

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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Similar questions

You are testing the claim that the proportion of men who own cats is smaller than the proportion of women who own cats.You sample 110 men, and 75% own cats.You sample 150 women, and 65% own cats.Find the proportion of the pooled samples, (pcpc), as a decimal, rounded to two decimal places.
The US population is 13% African American. If you were to take a SRS of 500 Americans, below what proportion will we find 50% of our sample proportions?
How would I solve this problem?
In a recent year, the Better Business Bureau settled 73% of complaints they received. You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is 0.73, as mentioned above. Suppose your sample size is 113. DO NOT USE THE EXCEL FORMULA. CALCULATE BY HAND OR WITH A CALCULATOR. 1. What is the probability that the sample proportion will be within 4 percent of the population proportion?
Phosphorous is a chemical that is found in many household cleaning products. Unfortunately, phosphorous also finds its way into surface water, where it can harm fish, plants, and other wildlife. Two methods of phosphorous reduction are being studied. At a random sample of 7 locations, both methods were used and the total phosphorous reduction (mg/L) was recorded. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value a small amount and thereby produce a slightly more "conservative" answer. Site 1 2 3 4 5 6 7 Method I: 0.013 0.020 0.015 0.055 0.007 0.002 0.010 Method II: 0.014 0.045 0.017 0.039 0.017 0.001 0.013 Do these data indicate a difference (either way) in the average reduction of phosphorous between the two methods? Use α = 0.05. (Let d = Method I − Method II.) (i) What is the level of significance? What is the value of the sample test statistic? (Round…
The total size of a university is 7,610. Determine the sample size for a study using the COchran's formula provided that Z = 1.96 and e = 0.05
A psychologist would like to examine the effects of a new drug on the activity level of animals. Three samples of rats are selected with n=5 in each sample. One group gets no drug, one group gets s small dose, and the third group gets a large dose. The psychologist records the activity level for each animal. The data from this experiment are presented below. No drug Small dose Large dose 5, 3 , 1 , 1 , 5 5, 5, 9, 6, 5 10, 12, 9, 6, 8 =3, SS=16 =6, SS=12 =9, SS=20 Do these data indicate any significant differences among the three groups? Test with α=0.05. Compute the effect size and interpret the result.
Determine the sample size associated with the following formula. Remember to always round up to the next highest whole number. ?=[(1.96)⋅(3.56)0.16]2n=[(1.96)⋅(3.56)0.16]2
Consider the population of all laptop computers owned by students at your university. You want to know the weight of the laptop. (a) Specify the population unit. (b) Specify the variable of interest. (c) Specify the statistical population.
Statistical tests are more accurate if there is a sample size of n > 30. how will a sample size of n = 20 effect the results of a test?
Mary is running for mayor. She wants to know if she has a chance to win, so she collects a random sample of 40 citizens to see if they are going to vote for her of her opponent, Henry. Out of the 40 citizens who were asked, 24 said they were voting for Henry and the other 16 said they were voting for Mary. Using this data test H0: p=.5 vs. Ha: p>.5, where p is the true proportion of people, who will vote for Mary in the population (i.e., the entire town)? Find the p-value of this test, and what is your conclusion if the test is performed at the a=.5 level?
You conducted an independent-groups experiment on two groups of laboratory rats, each containing 14 rats. Two rats from one condition died during the experiment. What is the total df for your t-test 14 24 26 28

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