A cognitive scientist wants to test whether there is any difference in puzzle-solving abilities between crows and sparrows. Independent samples of eleven crowsand fourteen sparrows were chosen at random. The crows took a mean of 34 minutes to solve a certain puzzle, with a standard deviation of 5.1 minutes. Thesparrows took a mean of 35 minutes to solve the same puzzle, with a standard deviation of 5.9 minutes.Assume that the two populations of completion times are normally distributed, and that the population variances are equal.Can we conclude, at the 0.05 level of significance, that u,, the mean puzzle-solving times for crows, is less than u,, the mean puzzle-solving times forsparrows?Perform a one-tailed test. Then complete the parts below.Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list offormulas.) (a) State the null hypothesis H, and the alternative hypothesis H,.H, :0H :0(b) Determine the type of test statistic to use.(Choose one) ▼O=0OSO(c) Find the value of the test statistic. (Round to three or more decimal places.)O

For the given data perform T test for two means

Answered: |(a) State the null hypothesis H and…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Test the hypothesis using the P-value approach. Be sure to verify the requirements of the test. Ho: p=0.88 versus H₁: p0.88 n=500, x=430, α = 0.05 -... p= 0.86 (Type an integer or a decimal. Do not round.) Find the test statistic Zo- Zo=1.38 (Round to two decimal places as needed.) Find the P-value. P-value= (Round to three decimal places as needed.) Help me solve this View an example Type here to search O T R Get more help. E 6 (2 4 8 (? 4 Clear all 95°F Mostly sunny
Choose the correct answer When we perform a chi-square test for independence, the null hypothesis states that the two variables are a. independent b. related c. normally distributed d. mutually exclusive
State whether the standardized test statistict indicates that you should reject the null hypothesis. Explain. (a) t= 1.608 (b) t= 0 (c) t= 1.502 (d) t= - 1.643 0. 6=1594 (a) For t= 1.608, should you reject or fail to reject the null hypothesis? O A. Reject Ho, because t> 1.594. O B. Fail to reject Hn. because t> 1.594. O C. Reject Ho, because t<1.594. O D. Fail to reject Hn. because t< 1.594.
State whether the standardized test statistic t indicates that you should reject the null hypothesis. Explain. (a) t= 1.566 (b) t=0 (c) t= 1.497 (d) t= - 1.571 6=1.546 (a) For t= 1.566, should you reject or fail to reject the null hypothesis? O A. Fail to reject Ho, because t 1.546. O C. Reject Ho, because t> 1.546. O D. Reject Ho, because t 1.546. O C. Reject Ho, because t>1.546. O D. Fail to reject Ho, because t<1.546. (c) For t= 1.497, should you reject or fail to reject the null hypothesis? OA Fail tn raiert H. haraiea t<1 KAR Click to select your answer. esc @ # $ * 3 4 5 6 8 * C0
Test the claim that the proportion of people who own cats is significantly different than 50% at the 0.02 significance level. Based on a sample of 100 people, 48% owned catsThe test statistic is: (to 2 decimals)The p-value is: (to 2 decimals)Based on this we: Reject the null hypothesis Fail to reject the null hypothesis
Test the claim that the proportion of people who own cats is larger than 30% at the 0.05 significance level.The null and alternative hypothesis would be: Based on a sample of 200 people, 32% owned catsThe test statistic is: (to 2 decimals)The p-value is: (to 2 decimals)
After asking a sample of her students for their opinion of her class, the statistics professor calculates the test statistic z = 2.69 for the hypothesis test H: p = 0.80 H: p > 0.80, where p is the proportion of all students in the class who enjoyed the class. Which of the following is true? a The P-value is .9964 and conclude that more than 80% of the students enjoyed her class. b The P-value is .0036 and conclude that more than 80% of the students enjoyed her class. c The P-value is .9964 and conclude that less than 80% of the students enjoyed her class. d The P-value is .0036 and conclude that less than 80% of the students enjoyed her class.
State whether the standardized test statistic z indicates that you should reject the null hypothesis. (a) z = 2.345 (b) z = 2.238 (c) z= 2.179 (d) z = 2.447 (a) For z = 2.345, should you reject or fail to reject the null hypothesis? A. Fail to reject Ho because z > 2.330. B. Reject Ho because z2.330. 0 Zo = 2.330 4 Z
The following hypothesis test is to be conducted. Ho: Median ≤ 190 H₂: Median > 190 A sample of 30 provided 22 observations greater than 190, 3 observations equal to 190, and 5 observations less than 190. Use α = 0.01. Find the value of the test statistic. (Round your answer to two decimal places.) z = 2.56 X Find the p-value. (Round your answer to four decimal places.) p-value = 0.0052 X What is your conclusion? Reject Ho. The population median is less than or equal to 190. Do not reject Ho. The population median is less than or equal to 190. Reject Ho. The population median is greater than 190. Do not reject Ho. The population median is greater than 190.
The data below were collected to test the effectiveness of a drug to lower systolic blood pressure. Blood pressure (in mm of mercury) was measured before and after treatment for 12 patients; the results are shown. The company claims the drug is effective. Explore this claim through completing the given questions. Assume the population differences is approximately normal and that all conditions for testing are satisfied. Subject A |E F H J G K L Before 200 174 198 170 179 182 193 209 185 155 169 210 After 191 170 177 167 159 151 176 183 159 145 146 177 Before - 9 After 4 21 3 20 31 17 26 26 10 23 33 Blank #1: The individual differences are given because these samples are Fill in the missing parts of the test to show it in its entirety: To explore whether the drug is effective, conduct a significance test using the hypotheses (do before - after as the direction of subtraction) Ho : Hdifference = 0 Ho : Hdifference Blank #2: Determine the correct alternative hypothesis by filling in the…
Hi can u answer the wrong ones
Test the hypothesis using the P-value approach. Be sure to verify the requirements of the test. H0: p=0.87 versus H1: p≠0.87 n=500, x=430 , a=0.1

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