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- Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find the probability of a bone density test score greater than 0.86. ... Sketch the region. Choose the correct graph below. ○ A. ^ -0.86 B. D. 0.86 0.86 -0.86 0.86 The probability is (Round to four decimal places as needed.)arrow_forwardA genetic experiment with peas resulted in one sample of offspring that consisted of 444 green peas and 167 yellow peas. a. Construct a 95% confidence interval to estimate of the percentage of yellow peas. b. Based on the confidence interval, do the results of the experiment appear to contradict the expectation that 25% of the offspring peas would be yellow? a. Construct a 95% confidence interval. Express the percentages in decimal form. ☐arrow_forwardDetermine whether the study is an experiment or an observational study, and then identify a major problem with the study. A sociologist has created a brief survey to be given to 2000 adults randomly selected from the U.S. population. Here is her first question: Have you ever been the victim of a felony crime? This is an individuals. because the researcher What is a major problem with the study? A. There is no blinding or replication, which has a high chance of leading to bias. B. There may be individuals that do not answer the question honestly. C. The responses will be voluntary, which will lead to a high chance of bias. D. The sample includes only U.S. adults. thearrow_forwardA claim is made that the proportion of children who play sports is less than 0.5, and the sample statistics include n = 1320 subjects with 30% saying that they play a sport. What is the null hypothesis? Find the value of the test statistic z. !!! B I U S TX = = = Xz x² Insert Formulaarrow_forwardListed below are the lead concentrations (in µg/g) measured in different Ayurveda medicines. Ayurveda is a traditional medical system commonly used in India. The lead concentrations listed here are from medicines manufactured in the United States. Assume that a simple random sample has been selected. Use a 0.10 significance level to test the claim that the mean lead concentration for all such medicines is less than 14.0 µg/g. 3.03 6.47 6.01 5.51 20.53 7.51 12.04 20.48 11.53 17.51 Identify the null and alternative hypotheses. Ho: H₁: (Type integers or decimals. Do not round.) Identify the test statistic. (Round to two decimal places as needed.) Identify the P-value. ... (Round to three decimal places as needed.) State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. the null hypothesis. There sufficient evidence at the 0.10 significance level to the claim that the mean lead concentration for all Ayurveda medicines manufactured…arrow_forwardThe following frequency distribution represents the scores on a math test. Find the class midpoint of scores for the interval 50-59. BIUS Ix Scores 50-59 E Xz Insert Formula Number of students 2 60-69 70-79 80-89 4 6 15 90-99 5arrow_forwardWhich of the following is NOT a property of the chi-square distribution? Choose the correct answer below. ... A. The mean of the chi-square distribution is 0. B. The chi-square distribution is different for each number of degrees of freedom. C. The chi-square distribution is not symmetric. D. The values of chi-square can be zero or positive, but they cannot be negative.arrow_forwardD2L Course Schedule × ⇒ Math 140 AC2 MT × G Google ☑ Untitled documen × G Google G square root sign ✗ adidas Samba OG X Math 140 AC2 MT X → C https://drive.google.com/file/d/1pXqJ_6k8OigXg6qML2lkxIM-bDwLhk5T/view 3. We're a little past the halfway point of the semester. I've been thinking about how we've been doing. I have noticed something interesting about the relationship between WAs and grades. I made a piecewise function to describe the situation. G(x) is the grade for someone who has completed x WAs. Use the function for parts a-c. (7.5 pts.) 20 for x=0 G(x)=15x+ 30 for 0arrow_forward3 Let F = (y² + z³, x³ + z², xz). Evaluate Saw F ds for each of the following regions W: A. x² + y² ≤ x ≤ 6 B. x² + y² ≤ z < 6, x ≥ 0 c. x² + y² ≤ z ≤ 6, x ≤ 0arrow_forwardYou are interested in the difference between two population means. Both populations are normally distributed, and the population variances σ1212 and σ2222 are known. You use an independent samples experiment to provide the data for your study. What is the appropriate test statistic? t = x̄Dx̄D/ √[sD2sD2(1/n1n1 + 1/n2n2)] F = s1s1/s2s2 z = (x̄1x̄1 – x̄2x̄2) / √[σ1212/n1n1 + σ2222/n2n2] t = (x̄1x̄1 – x̄2x̄2) / √[sp2sp2(1/n1n1 + 1/n2n2)] Suppose instead that the populations are not normally distributed. The test statistic given is still appropriate provided that . You are interested in the difference between two population means. The population variances σ1212 and σ2222 are unknown and equal. You use an independent samples experiment to generate the data for your study, and each of your samples meet the large sample requirement. What is the appropriate test statistic? z = (x̄1x̄1 – x̄2x̄2) / √[σ1212/n1n1 + σ2222/n2n2] t =…arrow_forwardFind mean median mode and midrange of data set 1600, 1900, 1850, 1900, 1650, 1050, 1900, 1800, 1050, 1350, 1900, 1450arrow_forward- - Given that a = i + j − 2k, b = 2i + 3j+k, and c = 3j — 5k, calculate the following: A. a. b B. c × (b xa) C. proja barrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_iosRecommended textbooks for you
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