I need to compute the test statistic, critical values, and p-value I know the test is two tailed, I just can't work out how to do it.. **Analysis of Birth Weights of Girls**A study was conducted to understand the birth weights of 31 girls. The collected data, presented in grams (g), is as follows:| 3201.2 | 2480.6 | 3120.0 | 2879.8 | 3438.1 ||--------|--------|--------|--------|--------|| 3573.2 | 3477.2 | 3827.7 | 3440.1 | 3192.4 || 3101.9 | 3399.8 | 3546.8 | 3696.8 | 3493.0 || 3047.6 | 3301.6 | 3447.4 | 3179.5 | 4456.1 || 3442.7 | 3435.8 | 3623.3 | 3189.1 | 3570.4 || 3707.5 | 2880.7 | 2878.4 | 3173.5 | 3557.5 || 3264.0 | | | | |### Descriptive StatisticsFrom the data collected:- The mean birth weight ( $ \bar{x} $ ) is calculated as 3355.6 g.- The sample standard deviation ( $ s $ ) is calculated as 356.01 g.### Hypothesis TestingWe aim to test the claim that the standard deviation of birth weights for girls is different from the known standard deviation of birth weights for boys, which is 460 g. This will be evaluated using a significance level of 10%.**Hypotheses:**- Null Hypothesis ( $ H_0 $ ): $ \sigma = 460 $ g- Alternative Hypothesis ( $ H_a $ ): $ \sigma \neq 460 $ gWe will conduct a hypothesis test using the chi-squared distribution to determine whether to reject the null hypothesis based on the given data.### Instructions1. **Calculate Test Statistic**: Use the chi-squared test statistic for variance:\[ \chi^2 = \frac{(n - 1) s^2}{\sigma^2} \]Where:- $ n $ = sample size (31)- $ s $ = sample standard deviation (

From the provided information,Sample size (n) = 31Mean (x̄) = 3355.6 gStandard deviation (s) =…

Answered: A sample of birth weights of 31 girls…

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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The proportion of households with pets is estimated to be 85% The proportion of 200 investigated households with pets is 0.78. Is this providing evidence that the 85% estimate is incorrect? Test at 95% confidence level. Hint This is a hypothesis test You need to calculate the test statistic and compare it with the critical value to make your decision and conclusion Select one O a No, since the test statistic is larger than the left critical value O b Yes, since the test statistic is smaller than the left critical value O c Yes, since the test statistic is more then the positive critical value O d No, since the test statistic is less than the positive critical value
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Why can we not know the true score for a test? Explain the formula for understanding observed scores. What is included in any observed score? How do reliability and validity work together?
first picture is background information
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Q2) Independent-Samples t-Test (Round calculated results to the hundredth (2nd place to the right of the decimal)) In a research project, researchers collected demographic and health data from a sample of elderly residents in the community. To examine any possible gender differences in their sample, they want to see if the females and the males differ significantly on the education level (number of years of formal schooling). The researchers are not predicting any direction in the possible gender differences so the hypotheses should be non-directional. They would like to run a two-tailed test with α = .10. Male Subject ID Education Female Subject ID Education 1 14 13 14 2 15 14 15 3 17 15 18 4 13 16 18 5 15 17 16 6 15 18 17 7 13 19 16 8 15 20 16 9 15 21 17 10 16 22 15 11 17…
psychologist is studying the self image of smokers, as measured by the self-image (SI) score from a personality inventory. She would like to examine the mean SI score, u, for the population of all smokers. Previously published studies have indicated that the mean SI score for the population of all smokers is 80 and that the standard deviation is 12, but the psychologist has good reason to believe that the value for the mean has changed. She plans to perform a statistical test. She takes a random sample of SI scores for smokers and computes the sample mean to be 72 Based on this information, complete the parts below.
How to write the hypothesis claim? My claim is students at the university use 10 or more hours of social media weekly. My sample was from 40 students
You are performing a two-tailed test with test statistic z = -2.003, find the p-value accurate to 4 decimal places. p-value =
Salma claimed that the gas price in Blue Park neighborhood (mean of $3.65) is higher than that in Green Spring (mean of $3.59). She obtained the t-value of 2.223 after calculating data from 6 gas stations in Blue Park and 5 gas stations in Green Spring. Use the chart below and determine if Salma's claim is supported! Table 10-3. Critical values of "t" significance level p= 0.05 significance level p= 0.01 TP 1 12.706 63.657 2 4.303 9.925 3 3.182 5.841 2.776 4.604 5 2.571 4.032 6 2.447 3.707 7 2.365 3.499 2.306 3.355 9 2.262 3.250 10 2.228 3.169 11 2.201 3.106 Copy the following into your text box, fill in the blanks, and answer the questions A. The degree of freedom is: B. The t-calculated value is: and the t-critical value is : C. Comparison: t-calc t-crit (answer with ()) D. Is the null hypothesis accepted or rejected? Explain how you determined that! Also, explain what it means to reject or accept the hypothesis! E. Explain if Salma's claim is supported based on your t-value…

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