Listed in the data table are amounts of strontium-90 (in millibecquerels, or mBq, per gram of calcium) in a simple random sample of baby teeth obtained fromresidents in two cities. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that thepopulation standard deviations are equal. Use a 0.10 significance level to test the claim that the mean amount of strontium-90 from city #1 residents is greater thanthe mean amount from city #2 residents.Click the icon to view the data table of strontium-90 amounts.What are the null and alternative hypotheses? Assume that population 1 consists of amounts from city #1 levels and population 2 consists of amounts from city #2.O A. Ho: H1= H2H1: H1> H2O B. Ho: H1 H2H1: H1> H2O D. Ho: H1= H2O C. Ho: H1SH2H1: H1> H2H1: H1##2 ntiMore InfoSCity #1102City #211779861211001151018586104213107110111131148290100304145133101209upPrintDone中

In the question, data is given for two samples: sample size n1=12 n2=12 Significance level α=0.10…

Answered: Listed in the data table are amounts of…

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 blood platelet counts of a group of women have a bell-shaped distribution with a mean of 245.4 and a standard deviation of 63.6. (All units are 1000 cells/μL.) Using the empirical rule, find each approx. percentage below. a. What is the approx. percentage of women with platelet counts within 3 standard deviations of the mean, or between 54.6 and 436.2? b. what is the approx. percentage of women with platelet counts between 118.2 and 372.6?
A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola is 45 milligrams. You want to test this claim. During your tests, you find that a random sample of thirty 12-ounce bottles of cola has a mean caffeine content of 46.7 milligrams. Assume the population is normally distributed and the population standard deviation is 7.7 milligrams. At α=0.05, can you reject the company's claim? Complete parts (a) through (f). (a) Identify H0 and Ha. (b) Find the critical value(s). Select the correct choice below and fill in the answer box within your choice. c) Identify the rejection region(s). Choose the correct answer below. d) Find the standardized test statistic. e) Decide whether to reject or fail to reject the null hypothesis. f) Interpret the decision in the context of the original claim.
A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola is 35 milligrams. You want to test this claim. During your tests, you find that a random sample of thirty 12-ounce bottles of cola has a mean caffeine content of 33.4 milligrams. Assume the population is normally distributed and the population standard deviation is 7.9 milligrams. At α=0.05, can you reject the company's claim? -Identify Ho and Ha. -Find the critical value and sketch the region -Calculate the test statistic -Do you reject Ho or fail to reject Ha
An SRS of size 10 is drawn from a population that has a normal distribution. The sample has a mean of 139 and a standard deviation of 7. Give the standard error of the mean 7 , 1
A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola is 35 milligrams. You want to test this claim. During your tests, you find that a random sample of thirty 12-ounce bottles of cola has a mean caffeine content of 35.4 milligrams. Assume the population is normally distributed and the population standard deviation is 7.9 milligrams. At α=0.05, can you reject the company's claim? Complete parts (a) through (e). Part 1(a) Identify H0 and Ha. Choose the correct answer below. A.) H0:μ≥35.4 Ha:μ<35.4 B.) H0:μ≠35 Ha:μ=35 C.) H0:μ=35 Ha:μ≠35 D.) H0: μ≥35 Ha: μ<35 E.) H0: μ≠35.4 Ha:μ=35.4 F.) H0: μ=35.4 Ha:μ≠ 35.4 (b) Find the critical value(s). Select the correct choice below and fill in the answer box within your choice. (c) Find the standardized test statistic. z= (d) Decide whether to reject or fail to reject…
A researcher compares two compounds (1 and 2) used in the manufacture of car tires that are designed to reduce braking distances for SUVS equipped with the tires. The mean braking distance for SUVs equipped with tires made with compound 1 is 71 feet, with a population standard deviation of 11.0. The mean braking distance for SUVs equipped with tires made with compound 2 is 74 feet, with a population standard deviation of 12.3. Suppose that a sample of 70 braking tests are performed for each compound. Using these results, test the claim that the braking distance for SUVS equipped with tires using compound 1 is shorter than the braking distance when compound 2 is used. Let μ₁ be the true mean braking distance corresponding to compound 1 and μ₂ be the true mean braking distance corresponding to compound 2. Use the 0.05 level of significance. Step 2 of 5: Compute the value of the test statistic. Round your answer to two decimal places. Answer How to enter your answer (opens in new window)…
The average size of a farm in one county is 162 acres with a standard deviation of 38 acres. The average size of a farm in a second county is 180 acres with a standard deviation of 40 acres. Assume the data were obtained from two samples that had 30 farms each. Can it be concluded that the average size of the farms in the two counties is different? (Let α = 0.05)
The daily sleep duration among college students is normally distributed with a mean of 8.13 and standard deviation of 1.87. You want to use a sample size such that 95% of the averages fall within ±15±15 minutes (.25 of an hour) of the true mean of 8.13. Determine the smallest number of students you need to sample.
The daily sleep duration among college students is normally distributed with a mean of 7.13 hours and standard deviation of 1.67 hours. You want to use a sample size such that 95% of the averages fall within ±15±15 minutes (.25 of an hour) of the true mean of 7.13 hours. Determine the smallest number of students you need to sample.
To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a safety engineer conducts braking tests for 35 models of Make A and 35 models of Make B. The mean braking distance for Make A is 43 feet. Assume the population standard deviation is 4.6 feet. The mean braking distance for Make B is 46 feet. Assume the population standard deviation is 4.5 feet. At α=0.10, can the engineer support the claim that the mean braking distances are different for the two makes of automobiles? Assume the samples are random and independent, and the populations are normally distributed. The critical value(s) is/are Find the standardized test statistic z for μ1−μ2.
A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola is 35 milligrams. You want to test this claim. During your tests, you find that a random sample of thirty 12-ounce bottles of cola has a mean caffeine content of 33.4 milligrams. Assume the population is normally distributed and the population standard deviation is 7.4 milligrams. At α=0.09, can you reject the company's claim? Identify Ho and Ha Find the critical values and rejection regions Find standardized test statistic Decide whether to reject or fail to reject the null hypothesis. interpret the decision in the context of the original claim.

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