A researcher wishes to see if the mean number of days that a basic, low price, small automobile sits on a dealer’s lot is 29. A sample of 37 automobile dealers has a mean of 34.83 days for basic, low price, small automobiles. At α=0.05, test the claim that the mean time is greater than 29 days. The standard deviation of the population is 4.16 days. What is the test value? Round-off your final answer to two decimal places.

Q: Find the IQ Score.  IQ score  0.3446 Distributed with a mean of 100 and a standard deviation of 15.…

A: Given DataMean = 100Standard deviation = 15Probability of IQ score of adults = 0.3446

Q: On a recent quiz, the class mean of 74 with the standard deviation of 3.9.  calculate the z-score…

A: Given data  μ = 74σ = 3.9x1 = 95x2 = 70

Q: The mean annual tuition and fees for a sample of 13private colleges was $33,300 with a standard…

A: Given: n= 13.0 ,x̄= 33300.0 ,s= 4500.0 µ= 35900.0 ,degree of freedom= 12.0

Q: Consider a value to be significantly low if its z score less than or equal to -2 or consider a value…

A: Given: Mean μ=19.8 Standard deviation σ=5.2 If  z≤-2, lowz≥2, high

Q: Consider a value to be significantly low if its z score less than or equal to - 2 or consider a…

A: The formula of z score is: z=x-uσ The values less than or equal to -2 can be considered as…

Q: Test scores for a history class had a mean of 89 with a standard deviation of 8.9. Suppose a student…

A: According to the given information, we have Mean = 89 Standard deviation = 8.9 Raw score = 67

Q: Use z scores to compare the given values. In a recent awards ceremony, the age of the winner for…

A:

Q: In a calculus class, Jack Hartig scored 8 on a quiz for which the class mean and standard deviation…

A: we have to find  which student did better...

Q: Researchers measured the length of time people spend brushing their teeth. For the 154 subjects in…

A: Given, Sample size = 154 Sample mean = 72.8 Sample standard deviation = 23.5   Set up the null and…

Q: You are conducting a survey of the total credit hours students take each semester at a college.…

A: Given,standard deviation (σ)=4.7margin of error (E)=1α=1-0.99=0.01α2=0.005Zα2 =Z0.005=2.58

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: Is there a doctor in the house? A market research firm reported the mean annual earnings of all…

A: GivenMean(x)=192890sample size(n)=47standard deviation(s)=43117α=0.01

Q: 500 freshmen at Crescent High School took an algebra test. The scores were distributed normally with…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: A gym class is taking a fitness test. The gym teacher is recording how many sit-ups the participants…

A:

Q: A statistics professor announces that 15% of the grades he gives are As. The results of the final…

A: It is given that the mean and standard deviation are 83 and 6, respectively.

Q: Use z scores to compare the given values.   In a recent awards​ ceremony, the age of the winner for…

A: Given : x¯actor = 45.5 sactor = 6.7 xactor = 34 x¯actress = 32.7 sactress = 10.2 xactress = 45 Z = x…

Q: Convert score 46 to z-score if the mean is 40 and the standard deviation is 4.

A: The definition of a z-score is:   z = (X - μ) / σ

Q: se z scores to compare the given values.   In a recent awards​ ceremony, the age of the winner for…

A: Given: the age of the winner for best actor =29 the age of the winner for best actress=45 For best…

Q: Consider a value to be significantly low if its z score less than or equal to -2 or consider a value…

A:

Q: What is the raw z-score?

A: Given information Population Mean = mu= 120 Standard deviation = s= 50 Raw score = x =65 Z score = ?

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: A commonly used standardized test in psychology research is designed so that the mean score of all…

A: From the provided information, Mean (µ) = 140 Standard deviation (σ) = 20 X~N (140, 20) Here X be a…

Q: Consider a value to be significantly low if its z score less than or equal to -2 or consider a value…

A: Given Mean, μ=20.5SD, σ=5.4

Q: A coach believes that her volleyball team is more athlêtič than thể average Volleyball ted…

A: The standard error can be calculated as: SE=sn

Q: Consider a value to be significantly low if its z score less than or equal to - 2 or consider a…

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: recent awards​ ceremony, the age of the winner for best actor was 33 and the age of the winner for…

A: Given that  For all best​ actors, the mean age is 44.6 years and the standard deviation is 8.3…

Q: An airline claims at the Average number of years of experience of its pilots is 18.3 years. In a…

A:

Q: An article in the San Jose Mercury News stated that students in the California state university…

A: Given that  x¯=5.1n=47s=1.2df=n-1=47-1=46confidence level=95%significance level=5% t critical…

Q: How often do people who live near the beach actually visit the beach? A random sample of 25…

A:

Q: Pearson publishes textbooks each semester and the mean number of textbook pages published by Pearson…

A: Given data,μ=568σ=150P(X>733)=?

Q: A radio station claims that the amount of advertising each hour has a mean of 17 minutes and a…

A:

Q: Consider a value to be significantly low if its z score less than or equal to -2 or consider a value…

A:

Q: Use z scores to compare the given values

A:

Q: The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?

A:

Q: For a certain type of job, it costs a copany an average of $231 to train an employee to perform the…

A: From the provided information, Mean (µ) = 231 Standard deviation (σ) = 5

Q: A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older…

A: Given Data : Sample Size, n = 14.0 Sample Mean, x̄ = 82.1 standard…

Q: A test is used to assess readiness for college. In a recent​ year, the mean test score was 19.2 and…

A: Given data: Mean test score, μ=19.2. Standard deviation, σ=4.5. A value is considered to be…

Q: Consider a value to be significantly low if its z score less than or equal to −2 or consider a value…

A: Given that Mean, mu= 21.4 Standard deviation, sigma= 5.4 Z score is given by, Z= (X-mu)/sigma

Q: Use z scores to compare the given values. The tallest living man at one time had a height of 238 cm.…

A: Solution

Q: A large number of applicants for admission to graduate study in business are given an aptitude test.…

A: Given,Mean, μ = 460Standard deviation, σ = 80Let X be a random variable represents the score.Using…

Q: Consider a value to be significantly low if its z score less than or equal to −2 or consider a value…

A: Given :   Mean = μ = 20.7 Standard deviation = σ = 4.7

Q: After the pandemic hit and people were forced to spend more time indoors, there have been a…

A: (d) The objective is to check that the average weight of the American male has gone up during this…