The mean weight of all 20-year-old women in a certain region is 130 pounds. A random sample of 50 vegetarian women in the region who are 20 years old showed asample mean of 124 pounds with a standard deviation of 15 pounds. The women's measurements were independent of each other. Complete parts (a) through (c)below.a. Determine whether the mean weight for 20-year old vegetarian women in the region is significantly less than 130, using a significance level of 0.05.Which of the following correctly states Ho and Ha?O A. Ho H# 130O B. Ho = 130O C. Ho <130Hµ= 130Ha H<130H u2 130O D. Ho: H= 130O E. Ho H= 130O F. Ho H>130Ha uz 130H > 130Hus 130

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Answered: The mean weight of all 20-year-old…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The mean weight of all 20-year-old women in a certain region is 130 pounds. A random sample of 50 vegetarian women in the region who are 20 years old showed a sample mean of 124 pounds with a standard deviation of 15 pounds. The women's measurements were independent of each other. Complete parts (a) through (c) below. a. Determine whether the mean weight for 20-year old vegetarian women in the region is significantly less than 130, using a significance level of 0.05. Which of the following correctly states H, and H,? O A. Ho: u#130 H3: p= 130 B. Ho: p= 130 OC. Ho: p 130 H p> 130 H ps 130 The test statistic is -2.83 (Round to two decimal places as needed.) The p-value is | (Round to three decimal places as needed.)
In a t-test for paired samples, the one value that compares, for each person, her or his two measurements is called the . Difference score Deviation score Standard deviation Standard difference
A random sample of 50 gas stations in Cook County, Illinois, resulted in a mean price per gallon of $2.60 and a standard deviation of $0.07. State the Empirical Rule. A histogram of the data indicates that the data follow a bell-shaped distribution. Use the Empirical Rule to determine the percentage of gas stations that have prices within three standard deviations of the mean. Determine the percentage of gas stations that have prices between $2.46 and $2.74, according to the Empirical Rule. Explain your calculations. Would a gas price of $2.99 be considered unusual in the statistical sense? Why or why not?
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The combined SAT scores for the students at a local high school are normally distributed with a mean of 1469 and a standard deviation of 296. The local college includes a minimum score of 1824 in its admission requirements. What percentage of students from this school earn scores that satisfy the admission requirement?
H6.
A particular fruit's weights are normally distributed, with a mean of 790 grams and a standard deviation of 26 grams.The heaviest 6% of fruits weigh more than how many grams?

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