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?
The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 260.1 and a standard deviation of 65.9. (All units are 1000 cells/uL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 2 standard deviations of the mean, or between 128.3 and 391.9? b. What is the approximate percentage of women with platelet counts between 62.4 and 457.8? ... a. Approximately % of women in this group have platelet counts within 2 standard deviations of the mean, or between 128.3 and 391.9. (Type an integer or a decimal. Do not round.) Clear all Check answer Get more help - 39°F Clear BELL
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
1. The amount of a certain trace element in extracellular fluid is known to vary with a standard deviation of 14.1 parts per million (ppm) for male super heroes’ donors and 9.5 ppm for female super heroes’ donors. Random samples of 75 male superheroes and 50 female super heroes yield concentration means of 28 and 33 ppm, respectively. What is the likelihood that the population means of concentrations of the element are same for both male and female super heroes?
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.

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