Question 2. In Aedirn, a fictional country, it is believed that the natural ratio of girls to boysis 100:105 (48.8% girls). You don't believe the reported figures of the percentage of girlsborn in Aedirn. So, you counted the number of girls and boys born in 107 randomly chosenrecent births and found that there are 50 girls and 57 boys (46.7% girls). Using this data,you want to know whether the ratio, 100:105, is reliable.(a) Select the correct hypothesis.Ho p= 0.488 versus Hap<0.488.:Ho p ≤ 0.467 versus Ha p > 0.467.:Ho p = 0.467 versus Hap‡ 0.467.Ho p= 0.488 versus Hap‡ 0.488.(b) State the conditions that allow Normal approximation to the sampling distribution of pand check if the conditions are satisfied.(c) Under Ho, what are the mean and variance of p.(d) Test Ho at the significance level a = 0.1.

Let p be the population proportion of girls in Aedirn. Given that, Population proprotion (p) = 48.8%…

Answered: Select the correct hypothesis. Ho p =…

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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What is b
K Among a random sample of 150 employees of a particular company, the mean commute distance is 25.2 miles. This mean lies 1.7 standard deviation(s) below the mean of the sampling distribution. In a second sample of 150 employees selected from the same company, the mean commute distance is 31.7 miles. This second sample mean lies 2 standard deviation(s) above the mean of the sampling distribution. If a third sample of 150 employees is selected, what is the probability that the sample mean will lie between 25.2 and 31.77 OA. 0.9772 OB. 0.045 OC. 0.933 OD. 0.022
A manufacturer claims that only 2% of their products are defective. A store receives a delivery of 300 items from the manufacturer. Let p-hat = the proportion of defective items in a sample of 300 items. Assuming the manufacturer is correct that only 2% of their products are defective, what are the mean and standard deviation of the sampling distribution of p-hat ? Options: The mean is 0.02 and the standard deviation is 0.008. The mean is 6 and the standard deviation is 2.42. The mean is 6 and the standard deviation is 5.88. The mean is 0.02 and the standard deviation is 0.196.
Decide whether the normal sampling distribution can be used. If it can be used, test the claim about the significance a using the given sample statistics. Claim: p0.27; a=0.10; Sample statistics: p= 0.21, n = 100 Ha: p=0.27 OC. Ho p≤0.27 Ha: p>0.27 OD. The test cannot be performed. Determine the critical value(s). Select the correct choice below and, if necessary, fill in the answer box to co his 10 A. The critical value(s) is/are (Round to two decimal places as needed. Use a comma to separate answers as needed.) OB. The test cannot be performed. Get more help - Q Search 16 4- 4+ hj 18 opyright © 2023 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | 90 IN P Pearson 20 tg 11 KAA wa w z t t t t t t t fff f10 S S DII 1. f11 DDI 12 12 +1 1!1 C
Distribution of sample means e.
The prices of a sample of books at University A were obtained by two statistics students. Then the cost of books for the same subjects (at the same level) were obtained for University B. Assume that the distribution of differences is Normal enough to proceed, and assume that the sampling was random. 1. Find the test statistic for this test. t = ___ (Round to two decimal places as needed.) 2. Find the p-value for this test. p-value = ____ (Round to three decimal places as needed.) 3. What is the conclusion for this test?
Decide whether the normal sampling distribution can be used. If it can be used, test the claim about the difference between two population proportions p1 and p2 at the given level of significance α using the given sample statistics. Assume the sample statistics are from independent random samples. Claim: p1=p2, α=0.10 Sample statistics: x1=142, n1=156 and x2=144, n2=188 Find the standardized test statistic. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
Researchers conducted a study to determine whether magnets are effective in treating back pain. Pain was measured using the visual analog scale, and the results shown below are among the results obtained in the s Higher scores correspond to greater pain levels. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) to (c) below. Reduction in Pain Level After Magnet Treatment (u): n=15, x=0.45, s=1.02 Reduction in Pain Level After Sham Treatment (H2): n = 15, x=0.38, s = 1.55 a. Use a 0.01 significance level to test the claim that those treated with magnets have a greater mean reduction in pain than those given a sham treatment (similar to a placebo). What are the null and alternative hypotheses? OA. Ho: H1 H2 H₁₁ 2H2 OC. Ho: HH2 H₁: H₁

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