A random sample of 150 recent donations at a certain blood bank reveals that 88 were type A blood. Does this suggest that the actual percentage of type A donations differs from 40%, the percentage of the population having type A blood? Carry out a test of the appropriate hypotheses using a significance level of 0.01. n USE SALT State the appropriate null and alternative hypotheses. Hoip = 0.40 H: p + 0.40 O Ho: p + 0.40 Ha: p = 0.40 O Ho: p = 0.40 Hi p < 0.40 O Ho: p = 0.40 H:p > 0.40 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) P-value =

A random sample of 150 recent donations at a certain blood bank reveals that 88 were type A blood. Does this suggest that the actual percentage of type A donations differs from 40%, the percentage of the population having type A blood? Carry out a test of the appropriate hypotheses using a significance level of 0.01. n USE SALT State the appropriate null and alternative hypotheses. Hoip = 0.40 H: p + 0.40 O Ho: p + 0.40 Ha: p = 0.40 O Ho: p = 0.40 Hi p < 0.40 O Ho: p = 0.40 H:p > 0.40 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) P-value =

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Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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As a result of dog breeding for certain physical traits, many dog breeds have changed in the last 100 years. A dog breeder wants to measure the effects of breeding on the face length of the boxer breed using a hypothesis test. Suppose that the dog breeder has face length measurements (in inches) from a random sample of 40 female boxer dogs taken in 1915 and a random sample of 40 female boxer dogs taken in 2015. Which type of hypothesis test should the breeder use? Reference: Elegans, C. 100 Years of Breed Improvement. 2012. Dog Behavior Science. Retrieved from: https://dogbehaviorscience.wordpress.com/2012/09/29/100-years-of-breed-improvement Test for one population proportion Test for one population mean Test for a difference in two population proportions Test for a difference in two population means
A random sample of 146 recent donations at a certain blood bank reveals that 82 were type A blood. Does this suggest that the actual percentage of type A donations differs from 40%, the percentage of the population having type A blood? Carry out a test of the appropriate hypotheses using a significance level of 0.01. USE SALT State the appropriate null and alternative hypotheses. Ho: P = 0.40 Ha: P = 0.40 Ho: P = 0.40 Ha: p > 0.40 Ho: P = 0.40 Ha: p < 0.40 Ho: P = 0.40 Ha: P = 0.40 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) Z = P-value = State the conclusion in the problem context. O Do not reject the null hypothesis. There is not sufficient evidence to conclude that the percentage of type A donations differs from 40%. O Do not reject the null hypothesis. There is sufficient evidence to conclude that the percentage of type A donations differs from 40%. O Reject the null hypothesis.…
Among 1820 subjects in a study, 30 suffered from tuberculosis and 1790 did not. Chest x- rays were given to all individuals and 73 had a positive x-ray while 1747 were negative. Develop a null and alternative hypothesis for disagreement between the x-ray and the culture. Based on the data should you reject the null hypothesis at a 0.05 level?
A pizza delivery driver recently complained that the college students he delivers to don't tip as much other adults. Test this complaint at the a 0.05 level of significance. Let uc represent the average tip left by a college student and 4o represent the average tip left by other adults. Which would be correct hypotheses for this test? Ho: Hc = Ho, H1: c > Ho Ho: 4c = Ho, H: Hc < Ho %3D OHo: Hc = Ho, H1 : µc # µ0 %3D OHo:Hc < Ho, H1: Hc = HO A random sample of 42 college students had left an average tip of $3.44, with a standard deviation of $1.03. A random sample of 30 non-college-student adults had left an average tip of $4.32, with a standard deviation of $0.92. Find the test statistic (2 decimal places): Give the P-value (4 decimal places - if less than 0.001 answer 0): Which is the correct result: O Do not Reject the Null Hypothesis O Reject the Null Hypothesis Which would be the appropriate conclusion? There is significant evidence to suggest that college students tip less, on…
A random sample of 144 recent donations at a certain blood bank reveals that 86 were type A blood. Does this suggest that the actual percentage of type A donations differs from 40%, the percentage of the population having type A blood? Carry out a test of the appropriate hypotheses using a significance level of 0.01. In USE SALT State the appropriate null and alternative hypotheses. O H: p = 0.40 H:p 0.40 O Ho: p + 0.40 H: p = 0.40 O H: p = 0.40 H:p + 0.40 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) Z = P-value = State the conclusion in the problem context. O Reject the null hypothesis. There is sufficient evidence to conclude that the percentage of type A donations differs from 40%. O Do not reject the null hypothesis. There is sufficient evidence to conclude that the percentage of type A donations differs from 40%. O Do not reject the null hypothesis. There is not sufficient…
Independent random samples from normal populations produced the results shown in the table to the right. Complete parts a through d below. a pyy What are the null and alternative hypotheses? OA. Ho: H₁-H₂ = 0.10 Ha: H₁-P₂20.10 B. Ho H₁-₂0 H₂H₁ ₂0 D. H₂:1₁-11₂=0 H₂H₁-H₂ <0 C. Ho: Hi-Hy=0.10 Ha: H₁-H₂ ≤0.10 What is the test statistic? (Round to two decimal places as needed.) Sample 1 2.2 1.2 3.3 1.1 2.9 Sample 2 2.9 3.3 2.9 3.4
A random sample of 144 recent donations at a certain blood bank reveals that 89 were type A blood. Does this suggest that the actual percentage of type A donations differs from 40%, the percentage of the population having type A blood? Carry out a test of the appropriate hypotheses using a significance level of 0.01. State the appropriate null and alternative hypotheses. H0: p = 0.40Ha: p < 0.40H0: p = 0.40Ha: p > 0.40 H0: p ≠ 0.40Ha: p = 0.40H0: p = 0.40Ha: p ≠ 0.40 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) z = P-value = State the conclusion in the problem context. Reject the null hypothesis. There is sufficient evidence to conclude that the percentage of type A donations differs from 40%.Reject the null hypothesis. There is not sufficient evidence to conclude that the percentage of type A donations differs from 40%. Do not reject the null…
Women athletes at a certain university have a long-term graduation rate of 67%. Over the past several years, a random sample of 36 women athletes at the school showed that 21 eventually graduated. Does this indicate that the population proportion of women athletes who graduate from the university is now less than 67%? Use a 1% level of significance. A USE SALT (a) What is the level of significance? (b) State the null and alternate hypotheses. O Hạ: p = 0.67; H,:p 0.67 O Hạ: p = 0.67; H,: p + 0.67 O Hg: p 5 and ng > 5. O The standard normal, since np > 5 and ng > 5. O The Student's t, since np < 5 and ng < 5. What is the value of the sample test statistic? (Round your answer to two decimal places.) (c) Find the P-value of the test statistic. (Round your answer to four decimal places.) Sketch the sampling distribution and show the area corresponding to the P-value. o-3 -1 1 2 3. -2 -1 1 -2 -1 1 -2 -1 1 2 O0-3 00-3 O0-3 (d) Based on your answers in parts (a) to (c), will you reject or…
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Fil 10. A small pilot study is conducted to investigate the effect of a nutritional supplement on total body weight. Six participants agree to take the nutritional supplement. To assess its effect on body weight, weights are measured before starting the supplementation and then after 6 weeks. The data are shown below. Is there a significant increase in body weight following supplementation? Run the test at a 5% level of significance. Demonstrate the five steps for hypothesis testing and explain your results. Subject İnitial Weight Weight after 6 Weeks 1 155 157 2 142 145 3 176 180 4 180 175 210 209 6. 125 126
The recidivism rate for convicted sex offenders is 13%. A warden suspects that this percent is different if the sex offender is also a drug addict. Of the 309 convicted sex offenders who were also drug addicts, 31 of them became repeat offenders. What can be concluded at the a = 0.01 level of significance? For this study, we should use Select an answer The null and alternative hypotheses would be: Ho: ? ✓ Select an answer H₁: ? Select an answer (please enter a decimal) (Please enter a decimal) The test statistic ? ✓ = The p-value = The p-value is ? va Based on this, we should [Select an answer the null hypothesis. Thus, the final conclusion is that ... (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) O The data suggest the population proportion is not significantly different from 13% at a = 0.01, so there is statistically insignificant evidence to conclude that the population proportion of convicted sex offender drug addicts who become…