Good credit: The Fair Issac Corporation (FICO) credit score is used by banks and other lenders to determine whether someone is a good credt nisk. Scoresrange from 300 to 850, with a score of 720 or more indicating that a person is a very good credit risk. An economist wants to determine whether the mean FICOscore is lower than the cutoff of 720. She finds that a random sample of 70 people had a mean FICO score of 705 with a standard deviation of 83. Can theeconomist conclude that the mean FICO score is less than 720? Use the a = 0.05 level of significance and the P-value method with the T-84 Plus calculator.Part 1 of 4ie the appropriate null and alternate hypotheses.D=0This hypothesis test is a right-taledtest.left-tailedright-talledtwo-tailed

Answered: Good credit: The Fair Isaac Corporation…

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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Records from the Washington Department of Licensing show that 47 former SFCC business students have incorporated their own businesses in the last five years. Eight of these students are selected at random and contacted. Each is asked how many people are employed by their corporation. The responses are: 7, 12, 13, 17, 10, 5, 10, and 6 employees. What is your best estimate of the mean number of employees for all 47 corporations?
The correct order of a statistical analysis is?
Listed below are amounts (in millions of dollars) collected from parking meters by a security company in a certain city. A larger data set was used to convict 5 members of the company of grand larceny. Find the mean and median for each of the two samples and then compare the two sets of results. Do the limited data listed here show evidence of stealing by the security company's employees? Security Company: 1.3 1.2 1.3 1.2 1.5 1.7 1.8 1.7 1.7 1.4 Other Companies: 1.8 1.9 1.7 2.3 1.7 1.5 1.9 2.3 2.3 1.6
The preeminent basketball philosopher Rasheed Wallace popularized the phrase, "Ball don't Lie." This phrase means that if a foul was called incorrectly, the free-throw shooter is more likely to miss their shots. (We can think of this as a sort of Basketball Karma.) Due to the recent "Last Two Minute Report," we now have some data to test this claim. Of the 177 free throws awarded incorrectly, the shooter made 78.5%. Use this information to test the claim, with a .05 level of significance, that the percentage of made free throws after an incorrect foul call is less than 80%, which is the FT Percentage for an average NBA player. Round your answers to three decimal places or to the nearest tenth of a percent. (e.g. .021 or 2.1%) For credit, the hypothesis test must contain: 1) Claim in terms of the appropriate parameter (e.g. LaTeX: \mu=\:4.5\:miles) 2) Null and alternative hypothesis 3) Sample evidence used 4) Test stat (z or t) , p-value and direction of test. (right, left or…
Cheese Consumption. The U.S. Department of Agriculture reports in Food Consumption, Prices, and Expenditures that the average American consumed 33 lb of cheese in 2010. Suppose that you want to decide whether last year’s mean cheese consumption is greater than the 2010 mean. a. Identify the null hypothesis.b. Identify the alternative hypothesis.c. Classify the hypothesis test as two tailed, left tailed, or right tailed.
If in a discrete data, 75% of the values are less than 30, then......?
The British Department of Transportation studied to see if people avoid driving on Friday the 13th. They did a traffic count on a Friday and then again on a Friday the 13th at the same two locations. The data for each location on the two different dates is in the table. Do the data show that on average fewer people drive on Friday the 13th? Test at the 10% level. Traffic Count 6th 13th 1990, July 138998 138877 1990, July 135438 136187 1991, September 132918 129920 1991, September 136810 133914 1991, December 124545 120192 1991, December 128339 125776 1992, March 122024 118128 1992, March 124013 120800 1992, November 136759 134911 1992, November 123410 122447 Dates State the null and alternative hypotheses. Ho: Hd ? ✓ Ha: Hd ? ✓ Calculate the test statistic. Round to four decimal places. d= Calculate the standardized test statistic. Round three decimal places. t = Find the p-value. Round to four decimal places. p-value = State your decision. O Since the p-value is greater than .10,…
In the United States, standardized testing is used to compare students' knowledge retention across the country. States will often use the results of standardized testing to allocate funding to districts within the state. One state in particular wanted to determine whether there was a difference in scores between schools on the eastern side of the state and schools on the western side of the state. A random sample of 30 schools on the eastern side and 35 schools on the western side were chosen. The mean score for the eastern schools was x1 = 109 with a standard deviation of 5.3. The mean score for the western schools was x2 = 104 with a standard deviation of 4.4. We would like to estimate the difference in the mean standardized scores from the eastern schools and western schools and determine the margin of error of this estimate with 98% confidence. (a) Determine the point estimate for the difference in mean standardized scores for the eastern and western sides of the state, ?1 −…
Calculate the relevant test statistic. Round your answer to two decimal places. t-statistic = i Find the p-value. Round your answer to three decimal places. p-value = i
Hello Sir.Good Evening. I'm sorry Sir, please repeat this explanation because there is data that is corrected, I have a question in my home work related Statistics lesson. The following below is my question.Please advise and Thank you so much.
if a data sample has a mode of 140, a median of 130, and a mean of 120 is the distribution of the data is positively skewed?
I. Background The Food and Drug Administration (FDA) tries to find out whether there is a relation between the number of years people smoked and the percentage of lung damage. FDA asks you for your help to find it out. You interviewed twenty people who have smoked and obtained the following data. II. Technical report: d) Choose your own significance level a (1 suggests 0.1, 0.05 or 0.01). State and test the hypothesis. Explain what your findings mean. e) Do your observations in part (b) agree to the results from part (c) and (d)? Explain f) Find the regression line equation. Explain what the line implies. g) Draw the regression line on your scatter plot. h) A man has smoked 13 years. predict the percentage for damage on his lung. (( please check images for accuracy, thank you!!!))

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