The amount of income taxes that people owe each year varies greatly from person to person because income levels vary greatly. In a SRS of 30 people, the standard deviation of the yearly income taxes was about $37,209. The IRS claims that the standard deviation of yearly income taxes is only $25,989. Test the claim given by the IRS using a level of significance of 10%.  State the type of test used, the p - value with interpretation, and the conclusion.

Q: Former basketball player, Rebecca Lobo, is 6'4" (or 76 inches). Suppose the average height of women…

A: We know, (1 foot = 12 inch)Given;X: height of womenmean(X)=μ=5'4''(i.e. 5 foot 4 inches)=64''(i.e.…

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: Given:  This lake is famous for cutthroat trout. A friend tells you that the average length of trout…

Q: Raul received a score of 73 on a history test for which the class mean was 70 with a standard…

A: Here we need to find the z score and for that, we have to use the formula z = Value-meanStandard…

Q: The mean assessed value of homes in Southern County is $158,000 with a standard deviation of…

A: Old mean = E(X) = 158000 Old SD = SD(X) = 32000

Q: A data set is normally distributed with a mean of 67 and a standard deviation of 12. What percent of…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: A psychology exam has 300 questions with each question worth 1 point. Assume that the distribution…

A: It is given that mean score is μ=165 and Standard deviation is σ=30 for a normal distribution of…

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: It is given that mean amount of food is 12 oz and number of dogs is 16. The sum of squared…

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: A large chemistry exam course took their final exam. The mean was 75 with a standard deviation of 8.…

A: Obtain the Z-score of the random variable X equals 60. The Z-score of the random variable X equals…

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: A test has a mean of 140 and a standard deviation of 27. What proportion of people have scores…

A:

Q: On a national achievement test score was 850 with a standard deviation of 100. What proportion of…

A:

Q: In a given school year, the ACT test mean score was 21 with a standard deviation of 4.9.  The same…

A:

Q: What is the formula for a deviation score from a population?

A: Formula :

Q: he cost of laptops is normally distributed with a mean of $750 and a standard deviation of $60. What…

A: GivenMean(μ)=750standard deviation(σ)=60

Q: Refer to the information in the below chart. Find the mean and standard deviation of the total…

A: The mean involves all the observation in the sample or population, it is calculated by adding all…

Q: The mean rate for cable t.v.from a sample of 80 households was $29 per month with a standard…

A:

Q: The amount of income taxes that people owe each year varies greatly from person to person because…

A:

Q: Laura learned that the average GPA in her school is 3.6 with a standard deviation of 0.3. If her GPA…

A: From the given information,   Mean = 3.6 Standard deviation = 0.3   The objective is to find the…

Q: You want to know the percentage of utility companies that earned revenue less than 39 million or…

A: Given data You want to know the percentage of utility companies that earned revenue less than…

Q: The average and standard deviation for ACT scores are 20 and 3 respectively. average and standard…

A:

Q: Last year, the mean salary of accounting clerks was $29932. If we assume that the annual salaries…

A: Given Data: Let X represent the random variable   X~ Normal (29932, 18502)

Q: The heights of women are approximately Normal with mean 63.7 inchs and standard deviation 2.5…

A: Given information For Women Mean (µ1) = 63.7 inches Standard deviation (σ1) = 2.5 inches For men…

Q: A standardized test has a pop. mean of 152 and a standard deviation of 16. Molly scores at the 91st…

A:

Q: Last year the revenue for utility companies had a mean of $60 million with a standard deviation of…

A:

Q: on a national achievement test score was 850 with a standard deviation of 100. what proportion of…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the…

A: Mean = 118.3 Sd =25 N= 25 Hypothesis test Ho :μ = 110Ha:μ > 110

Q: he mean on an exam is 80 with a standard deviation of 5 points. If Joe scored a 90 on the exam, what…

A: given data, μ=80σ=5x=90 z score for the given data=?

Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90,…

A: Given that, Mean = 72 Standard deviation = 7

Q: The weight of a division I college football player has a mean of 255lb and a standard deviation of…

A:

Q: The weekly mean income of a group of executives is $1,000 and the standard deviation of this group…

A:

Q: The mean composite score for seniors who took the SAT in 2010 was 1068. If the standard deviation…

A: From the provided information, Mean (µ) = 1068 Standard deviation (σ) = 100

Q: a quantitative data set has mean 25 and standard deviation 2. approximately what percentage of the…

A: The given data is as follows:Population mean, Population standard deviation,

Q: list the number of expenses for each day and create a graphical representation of the gathered data.…

A: list the number of expenses for each day and create a graphical representation of the gathered data.…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.