C. Compute the test value D. Make a decision Cost of Braces The average cost for teeth straightening with metal braces is approximately $5475. A nationwide franchise thinks that its cost is below thatfigure. A random sample of 23 patients across the country had an average cost of $5219 with a standard deviation of $624. At a=0.05, can it be concluded thatthe mean is less than $5475? Assume that the population is approximately normally distributed.Part 1 of 5(a) State the hypotheses and identify the claim.H: μPart: 1 / 5▼H₁: μ<This hypothesis test is a one-tailedPart 2 of 55475 not claim$5475 claim(b) Find the critical value(s). Round the answer(s) to at ast three decimal places. If there is more than one critical value, separate them with commas.Critical value(s):00....test.X3

Given n=23, population mean μ=5475, sample mean X̄=5219 s=624, level of significance ɑ= 0.05

Answered: Cost of Braces The average cost for…

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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In a study assessing helping behavior among college students on their way to class, you recruit 10 students. You tell some participants that they are late for class and need to rush. You tell others they are right on time. Finally, you tell others they have lots of time before class. As they walk across campus, they come across a man (actually a confederate) who appears to need help. You measure the extent to which the participant noticed that the confederate needed help (1 = did not notice to 9 = really noticed). Which hypothesis test would you calculate? F test Independent sample t-test z test Dependent sample t-test
A study was undertaken to determine whether the consumers have any preference among four brands of cars. A sample of 200 people was used to collect data. I. II. Brand Number of consumers A 49- B B 52- α с 61+ B D 38+a Chi-square goodness of fit test can be applied to the above data set. Write 2 reasons. Using chi squared goodness of fit test, determine whether the consumers have any preference among four brands of cars. State your hypotheses and all workings clearly. (Critical value for degrees of freedom 3 and significance level 0.05 is 7.815.)
Identify each of the variables as quantitative or categorical. Also, identify each of the variables as an explanatory variable or a response variable.
A researcher designs an intervention to combat anti-Arab oppression. She also designs a questionnaire to measure anti-Arab oppression so she can test the participants' level of anti-Arab oppression before and after the intervention. She tests one version of her questionnaire with 45 statements and a shorter version with 12 statements. In both questionnaires, the participants respond to each statement with a rating on a 5-point Likert scale with 0 equaling "strongly disagree" and 4 equaling "strongly agree." The overall score for each participant is the mean of his or her ratings for the different statements on the questionnaire. Look at the following graphs. Graph I graphs the results from the long version, and Graph II graphs the results from the short version. Graph I Graph II PARTICIPANTS PARTICIPANTS 8 8 7 7 6 6 4 4 3 3 2 1 1 1 2 3 4 2 4 LONG QUESTIONNAIRE SCORE SHORT QUESTIONNAIRE SCORE Complete the following sentences by trusting your eyes to see meaningful differences in the two…
ces An article reports that in a sample of 124 nurses, 53 said that a busy workload had a positive effect on their enjoyment of their job. Can you conclude that less than 45% of nurses feel that a busy workload has a positive effect on their enjoyment of their job? Find the P- value and state a conclusion. The P-value is We (Click to select) conclude that less than 45% of nurses feel that a busy workload has a positive effect on their enjoyment of their job.
A research study wanted to examine whether religious belief and gender are related in their state. They selected a representative sample of men and women in their State.Select the null and alternative hypothesis of the test: H0: there is no relationship between gender and belief about human originsHa: there is a relationship between gender and belief about human origins H0: there is a relationship between gender and belief about human originsHa: there is no relationship between gender and belief about human origins Results of the study are summarized in this table for the Belief about human origins: religious texts evolutionary theory total male 30 36 66 female 110 89 199 total 140 125 265 The degrees of freedom for the the ?2 statistic are Round the following numbers to two places after the decimal:The test statistic is ?2 = with a p-value = The conclusion of the test at the 5% significance level is There is not enough statistical evidence to suggest that gender…
There exists 2 treatments for a specific illness. One uses pills, and the other infrared pulses. To measure the illness, you measure the level of the a particular marker in the blood; the higher the marker, the worse the disease. Which of the following tests the claim that the infrared pulse treatment improves outcomes better ?
find the value represented by z-score of 2.043, given u=63 and o=4.25
For each scenario below name one categorical and one quantitative used and write the complete answer in the box below. a) 9 randomly selected patients with 4 blood types (A , B, O, AB) were tested for their body temperature. Categorical variable: Quantitative variable: b) 10 faculty members from the Physics, Psychology and Biology department were asked about their annual salary. Categorical variable: Quantitative variable:
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