40 people are randomly selected and the accuracy of their wristwatches is checked, with positive errors representing watches that are ahead of the correct time and negative errors representing watches that are behind the correct time. The 40 values have a mean of 110 seconds and a population standard deviation of 197 seconds. Use a 0.01 significance level to test the claim that the population of all watches has a mean of 0 seconds (use two-sided alternative). What is the test statistic? What is the P-Value?

Q: The mean value of land and buildings per acre from a sample of farms is $1500, with a standard…

A: The mean is 1500 and the standard deviation is 300.

Q: a successful basketball player has a height of 6 feet 9 inches, or 206 cm. Based on statistics from…

A: Given,           Z -score=4.45           A basket ball player has a height of  6 feet 9…

Q: The mean weight of newborn infants at a community hospital is 6.6 pounds. A sample of seven infants…

A: Sample points are 9.0,7.3,6.0,8.8,6.8,8.4,6.6. Sample size = n = 7.

Q: Yoonie is a personnel manager in a large corporation. Each month she must review the employees in…

A: Solution: It is given that from the past experience of Yoonie, it takes her approximately four hours…

Q: If you have 100 people in your sample, what would be the degrees of freedom you use to calculate the…

A: Given, n=100 Degree of freedom(df)=?

Q: A college was conducting a phonaton to raise money to increase students’ scholarships. The president…

A: The observations of the amount pledged (in thousands of dollars) are as follows:16, 18, 11, 17, 13,…

Q: An advertising agency has stated that 20% of all television viewers watch a particular program. How…

A: From the provided information, An advertising agency has stated that 20% of all television viewers…

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: The mean number of minutes for app engagement by a tablet user is 8.2 minutes. Suppose the standard…

A: GivenMean(μ)=8.2standard deviation(σ)=1sample size(n)=60

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

A:

Q: Suppose that you are interested in the earnings of GE employees. You have randomly sampled 225…

A: N=225,x¯=300,s=75,μ=288,α=0.01SX¯=sN=75225=5df=N−1=225−1=224

Q: A randomly selected list of everyday food items was generated. Twenty-eight Grub Savers stores were…

A:

Q: A company that makes baseball caps for babies is designing a new type of hat for toddlers. The new…

A: Here we are need to find the maximum and minimum head sizes for each new hat. Here each means we are…

Q: Five cars of the same year and model were tested for gas mileage in highway driving and the results…

A: The data are X: 30,39,33,31,27

Q: An  independent  research  was  made  to  calculate  the mean  weight  of  elder  people  in…

A: An independent research was made to calculate the mean weight of elder people in Russia.

Q: In a study of Ridge View's boys' basketball team, the average height is 68 inches and standard…

A: Given, mean =μ=68Standard deviation = 4x = 78

Q: The following are two data sets on car dealership sales at two dealerships. Which data set has the…

A: The standard deviation formula: standard dveiation = ∑xi-x2n-1Here,Xi= sample valuesx = sample meann…

Q: Use z scores to compare the given values.   The tallest living man at one time had a height of 225…

A: Given that  The tallest living man at one time had a height of 225 cm. The shortest living man at…

Q: A successful basket ball player has a height of 6 feet 4 inches. Based on statistics his height…

A: As given, The basketball player has a height of 6 feet 4 inches and when his height is converted to…

Q: flight attendant wants to know how many children fly on her route every day. She has a dataset with…

A: In statistics, three measures of central tendency are widely used. These three measures are also…

Q: A primary school is conducting a canned food drive . The mean number of canned goods donated by each…

A: Given, Mean μ = 10Standard deviation σ = 3No of cans Alberto donated X = 16

Q: During one season of racing at the Talladega Superspeedway, the mean speed of the cars racing there…

A:

Q: Use Z scores to compare the given values. The tallest living man at one time had a height of 232 cm.…

A: From the provided information, Mean (µ) = 171.93 cm Standard deviation (σ) = 5.98 cm Let X be a…

Q: at one time had a height of 243 cm. The shortest living man at that time had a height of 127.5 cm.…

A: Concept: A z-score is known as the standard score that determines how much the data point deviates…

Q: As reported in Runner's World magazine, the times of the finishers in the New York City 10- km run…

A: Percentile : Percentile is the number such that certain percentage of the fall below that values.…

Q: The heights of 82 roller coasters have a mean of 280.7 feet and a population standard deviation of…

A: Given data normally distributed with mean of 280.7 feet, population standard deviation 59.3 feet and…

Q: Do you prefer taking tests on paper or online? A college instructor gave identical tests to two…

A: It is assumed that the population variances are equal. The null and alternative hypotheses are…

Q: Jeff is doing an experiment involving mice. The mice weights have mean weight 2.37 ounces and…

A:

Q: The college board reports that in a recent year, the mean mathematics SAT score was 514, and the…

A:

Q: A company wants to assess the average time it takes for customers to complete a particular task on…

A: Answer:Sample Mean ():

Q: A successful basketball player has a height of 6 feet 11 ​inches, or 211 cm. Based on statistics…

A:

Q: A successful basketball player has a height of 6 feet 3 ​inches, or 191 cm. Based on statistics from…

A: Given,a basketball player has a height of 6 feet 3 inchesand the Z-score =2.31

Q: A successful basketball player has a height of 6 feet 4 ​inches, or 193 cm. Based on statistics from…

A:

Q: Use z scores to compare the given values.   The tallest living man at one time had a height of 245…

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