Standard Normal Distribution0.4Step 1: Select one-tailed or two-tailed.O One-tailedO Two-tailed0.3 +Step 2: Enter the test statistic.(Round to 3 decimal places.)0.2-Step 3: Shade the area represented bythe p-value.0.1-Step 4: Enter the p-value.(Round to 3 decimal places.)?(c) Based on your answer to part (b), choose what the administrator can conclude, at the 0.10 level of significance. According to previous studies, the mean distance each visitor in Greenspan National Park hikes during their visit is 21 kilometers. The park recently closed itsshuttle system, which used to transport hikers to many of the park's most popular hiking trails. Because of this, an administrator at the park suspects the meandistance, u, is now less than 21 kilometers. The administrator chooses a random sample of 85 visitors. The mean distance hiked for the sample is 20.5kilometers. Assume the population standard deviation is 8.3 kilometers.Can the administrator conclude that the mean distance hiked by each visitor is now less than 21 kilometers? Perform a hypothesis test, using the 0.10 level ofsignificance.(a) State the null hypothesis H and the alternative hypothesis H .H: 0O

Parametric test are used when the population follows normal distribution. If they fails to follow…

Answered: Standard Normal Distribution 0.4 Step…

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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What is the z score?
Use the normal distribution of IQ scores, which has a mean of 85 and a standard deviation of 19, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. The percentage of scores between 75.5 and 132.5 is__% (round two decimal places as needed)
Estimating Mean SAT Math Score The SAT is the most widely used college admission exam. (Most community colleges do not require students to take this exam.) The mean SAT math score varies by state and by year, so the value of u depends on the state and the year. But let's assume that the shape and spread of the distribution of individual SAT math scores in each state is the same each year. More specifically, assume that individual SAT math scores consistently have a normal distribution with a standard deviation of 94. An educational researcher wants to estimate the mean SAT math score (u) for his state this year. The researcher chooses a random sample of 681 exams in his state. The sample mean for the test is 486. Find the 99% confidence interval to estimate the mean SAT math score in this state for this year. Use the unrounded values in Excel to find the answers to #2, #3 and # 4. 1. The z-value is -- ✔ 2. The standard error has a value of -- 3. The margin of error has a value of - 4.…
Teachers' Salaries in North Dakota The average teacher's salary in North Dakota is $35,441. Assume a normal distribution with o=$5100. Round the final answers to at least 4 decimal places and round intermediate z-value calculations to 2 decimal places. Part: 0/ 2 Part 1 of 2 What is the probability that a randomly selected teacher's salary is greater than $37,000? P (X > 37,000) = | Submit Assignm Next Part Privacy Accessi 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use SAMSUNG % &
Age - X Number of meal in a day - Y Frequency of snack in a day - Z. Can we conclude that X, Y and Z follow a normal distribution? Why?
Question Help ▼ A car company says that the mean gas mileage for its luxury sedan is at least 21 miles per gallon (mpg). You believe the claim is incorrect and find that a random sample of 7 cars has a mean gas mileage of 20 mpg and a standard deviation of 3 mpg. At a= 0.025, test the company's claim. Assume the population is normally distributed. Click here to view the t-distribution table Click here to view page 1 of the normal table Click here to view page 2 of the normal table Which sampling distribution should be used and why? O A. Use a t-sampling distribution because the population is normal, and o is unknown. O B. Use a t-sampling distribution because the population is normal, and o is known. C. Use a normal sampling distribution because the population is normal, and o is unknown. O D. Use a normal sampling distribution because n> 30 E. Use a t-sampling distribution because n 21 H, u#21 What is the value of the standardized test statistic? The standardized test statistic is…
What percent of the total population is found between the mean and the z-score given? (Use the standard normal distribution table and enter your answer to two decimal places.) z = 3.32
A company that manufactures batteries used in electric cars is reporting that their newest model of battery has a mean lifetime, µ, of 18 years. To test the company's claim, a competitor has selected 56 of these batteries at random. The mean lifetime of the sample is 18.9 years. Suppose the population standard deviation of these lifetimes is known to be 4.8 years. Is there enough evidence to reject the claim that the mean lifetime of the newest model is 18 years? Perform a hypothesis test, using the 0.05 level of significance. (a) State the null hypothesis H, and the alternative hypothesis H,. Ho: 0 O
Use the standard normal table to find the z-score that corresponds to the cumulative area 0.8251. If the area is not in the table, use the entry closest to the area. If the area is halfway between two entries, use the z-score halfway between the corresponding z-scores. Standard Normal Distribution part 1 z .09 .08 .07 .06 .05 .04 .03 .02 .01 .00 -3.4 0.0002 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 -3.3 0.0003 0.0004 0.0004 0.0004 0.0004 0.0004 0.0004 0.0005 0.0005 0.0005 -3.2 0.0005 0.0005 0.0005 0.0006 0.0006 0.0006 0.0006 0.0006 0.0007 0.0007 -3.1 0.0007 0.0007 0.0008 0.0008 0.0008 0.0008 0.0009 0.0009 0.0009 0.0010 -3.0 0.0010 0.0010 0.0011 0.0011 0.0011 0.0012 0.0012 0.0013 0.0013 0.0013 -2.9 0.0014 0.0014 0.0015 0.0015 0.0016 0.0016 0.0017 0.0018 0.0018 0.0019 -2.8 0.0019 0.0020 0.0021 0.0021 0.0022 0.0023 0.0023 0.0024 0.0025 0.0026 -2.7 0.0026 0.0027 0.0028 0.0029 0.0030 0.0031 0.0032 0.0033 0.0034 0.0035 -2.6 0.0036 0.0037 0.0038 0.0039 0.0040…
Conceptual Overview: Discover and visualize probability ranges for the standard normal distribution.
Parts a-c
Assuming variance > 1, which of the following must be true? The sample variance is calculated based on the sample size rather than the degrees of freedom The data are normally distributed Standard deviation < variance The model will explain more than 50% of the variance of the dependent variable

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Standard Normal Distribution 0.4 Step 1: Select one-tailed or two-tailed. O One-tailed O Two-tailed 0.3+ Step 2: Enter the test statistic. (Round to 3 decimal places.) 0.2+ Step 3: Shade the area represented by the p-value. 0.1 - Step 4: Enter the p-value. (Round to 3 decimal places.)