The recent default rate on all student loans is 5.1 percent. In a recent random sample of 322 loans at private universities, there were 19 defaults. Does this sample show sufficient evidence that the private university loan default rate is below the rate for all universities, using a left- tailed test at a = 010? (a-1) Choose the appropriate hypothesis. а. Не 2.051; H: <.051. Accept H, if z<-2.326 b. Hg: 2.051; H: <.051. Reject Ha if z<-2.326 (a-2) Calculate the z-score for the sample data using a left-tailed test at a = .01. (A negative value should be indicated by a minus sign. Round your answer to 3 decimal places.) Zcalc

The recent default rate on all student loans is 5.1 percent. In a recent random sample of 322 loans at private universities, there were 19 defaults. Does this sample show sufficient evidence that the private university loan default rate is below the rate for all universities, using a left- tailed test at a = 010? (a-1) Choose the appropriate hypothesis. а. Не 2.051; H: <.051. Accept H, if z<-2.326 b. Hg: 2.051; H: <.051. Reject Ha if z<-2.326 (a-2) Calculate the z-score for the sample data using a left-tailed test at a = .01. (A negative value should be indicated by a minus sign. Round your answer to 3 decimal places.) Zcalc

Name: (a-3) Should the null hypothesis be rejected?YesNo(b) Calculate the p
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: (a-3) Should the null hypothesis be rejected?YesNo(b) Calculate the p-value. (Round your answer to 4 decimal places.)p-value(c) The assumption of normality is justified.YesNo The recent default rate on all student loans is 5.1 percent. In a recent r

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

To identify the correct Z(critical), it is important to determine whether the hypothesis test is one-tailed or two-tailed. The decision between a one- and two-tailed hypothesis is based on the researcher's expectations about the population from which the sample was selected. Many people believe that millennials are having more sex than people during the sexual revolution. You wonder whether the cohort currently in their twenties had sex at an earlier age than older generations. Assume that the the average age of first sexual intercourse is 17.4 years. You obtain a sample that yields a sample mean of X = 15.9 years. Let u denote the average age of first sexual intercourse. Formulate your null and research hypotheses by selecting the appropriate values in the dropdown menus that follow. Ho: (H₁: The test you conduct is test. Note: A one-tailed test is described as a lower-tailed test if the null hypothesis is rejected for values of the test statistic in the lower tail of its…
A company manufactures tennis balls. When its tennis balls are dropped onto a concrete surface from a height of 100 inches, the company wants the mean height the balls bounce upward to be 54.8 inches. This average is maintained by periodically testing random samples of 25 tennis balls. If the t-value falls between −t0.98 and t0.98, then the company will be satisfied that it is manufacturing acceptable tennis balls. A sample of 25 balls is randomly selected and tested. The mean bounce height of the sample is 56.6 inches and the standard deviation is 0.25 inch. Assume the bounce heights are approximately normally distributed. Is the company making acceptable tennis balls? Find −t0.98 and t0.98. −t0.98 = t0.98= Find the t-value
A company manufactures tonnis balls. When its tennis balls are dropped onto a concrete surface from a height of 100 inches, the company wants the mean height the balls bounce upward to be 54.7 inches. This average is maintained by periodically testing random samples of 25 tennis balls. If the t-value falls between -to ak and t as then the company will be satisfied that it is manufacturing acceptable tennis balls. A sample of 25 balls is randomly selected and tested. The mean bounce height of the sample is 56.8 inches and the standard deviation is 0.25 inch. Assume the bounce heights are approximately normally distributed. Is the company making acceptable tennis balls? Find -th os and to 96- -to.96 = 0.96 = (Round to three decimal places as needed.)
Suppose are running a study/poll about the proportion of men over 50 who regularly have their prostate examined. You randomly sample 116 people and find that 99 of them match the condition you are testing. Suppose you are have the following null and alternative hypotheses for a test you are running: Но: р — 0.83 На :р> 0.83 Calculate the test statistic, rounded to 3 decimal places = Z
Average IQ scores for young school children are known to be 100 (SD = 15). However, the literature indicates that children’s intelligence may be decreased if their mothers have German measles during pregnancy. Using hospital records, a researcher obtained a sample of n = 25 school children whose mothers all had German measles during their pregnancies. Do the data indicate that children born to mothers who had German measles during the pregnancy have significantly lower IQ scores than typical young school children? DATA (Fictional) child IQ scr 1 91 2 111 3 97 4 95 5 96 6 95 7 95 8 96 9 94 10 93 11 95 12 92 13 96 14 91 15 97 16 93 17 92 18 99 19 93 20 97 21 85 22 94 23 96 24 95 25 96 Looking at the research scenario for this lab, you will see that it says, “ literature indicates that children’s intelligence may…
A sample of 36 breastfed infants found that 2 of them developed iron deficiency by age 5.5 months. Using the plus-four method, what is the 95% confidence interval for the population proportion of breastfed infants who have iron deficiency? Choose from available choices. a. (-0.0193, 0.1304) b. (-0.0072, 0.1184) c. (0.0071, 0.1929)
I am needing help with how to answer this in R. 1. A [national survey](http://www.pewinternet.org/2012/11/01/how-teens-do-research-in-the-digital-world/) in 2012 showed that 75% of middle and high school teachers believe their students use Wikipedia for typical research statements. Let X equal the number of teachers in a random sample of size n = 40 who believe their students use Wikipedia. i) How is X distributed? ii) Use `plotDist()` to draw the probability distribution of X. iii) Compute the probability that X is equal to 30.
How do you Express the confidence interval (0.839, 0.958) in the form of p±E?
If n1 = 120, x1 = 45, n2 80, x2 = 35. Calculate the 98% confidence interval for p1-p2. O (-0.172,0.144) O (-0.197,0.111) O (-0.227,0.101) O (-0.379, -0.021)
Previously, forcing a mother smoked more than 21 cigarettes during the pregnancy. A doctor believes that the pregnancy of mothers who smoke 21 cigarettes or more is less than 4% today. She randomly selects 140 pregnant mothers and find that 2 of them smoke 21 or more cigarettes during pregnancy. Test the research statement at the = 0.05 level of significance. identify the correct Null and alternative hypothesis. use technology to find the P value. P value =_. (round to three decimal places as needed.) should one reject the null hypothesis? or should one not reject the null hypothesis?
Answer the following and show your solution.
A company manufactures tennis balls. When its tennis balls are dropped onto a concrete surface from a height of 100 inches, the company wants the mean height the balls bounce upward to be 54.7 inches. This average is maintained by periodically testing random samples of 25 tennis balls. If the t-value falls between - to 99 and to 99, then the company will be satisfied that it is manufacturing acceptable tennis balls. A sample of 25 balls is randomly selected and tested. The mean bounce height of the sample is 56.7 inches and the standard deviation is 0.25 inch. Assume the bounce heights are approximately normally distributed. Is the company making acceptable tennis balls? Find -to 99 and to.99- - to.99 = to.99 = (Round to three decimal places as needed.) Find the t-value. t-value = Is the company making acceptable tennis balls? Choose the correct answer below. O A. The tennis balls are not acceptable because the t-value falls outside -tn og and to oa.