One-sample t-test The manufacturer declares the weight of the ball bearings to be 50 g. In a random sampling, 14 bearings were weighed, with an average weight of 48 g and a standard deviation of 6 g. Can we assume at a 5% level of significance that the weight of the bearings is 50 g?

Q: The lowest and the highest data value of a data set are 12 and 28 respectively, then the approximate…

A:

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: Based on the table, the standard deviation is 0.5 male. What is the variance? Include appropriate…

A: Given The data is as follows: The standard deviation is 0.5 male.

Q: Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 69…

A: Solution:The empirical rule for any normal distribution is given below.68% of the observations fall…

Q: Use the body temperatures, in degrees Fahrenheit, listed in the accompanying table. The range of the…

A:

Q: A population has a mean μ = 88 and a standard deviation a=7. Find the mean and standard deviation of…

A: The mean is 88 and the standard deviation is 7.

Q: Calculate the sample standard deviation using this data for how long it takes a client to buy your…

A: In this problem, we are aksed to calculate the sample standard deviation for the time it takes a…

Q: The average dog at a dog facility takes 25 trials in order to learn how to sit, with a standard…

A: The normal distribution is a continuous probability distribution that has wide applications. X…

Q: Choose a quantitative variable.  Measure it on two different samples of 10, drawn from two different…

A:

Q: n the 1992 presidential election, Alaska's 40 election districts averaged 1951 votes per district…

A: 1951 can be considered as a population mean because it is calculated from the whole population,…

Q: Find the sample standard deviation. The top five scores on last semesters midterms were 90 97 100 90…

A: The question is about measures Given : Data - 90, 97, 100, 90, 93   To find : Sample std. deviation

Q: #6 The AKC says that the average weight of Chihuahua dogs is 4.6 lbs. sample A veterinarian thinks…

A: 6) Let μ  and σ denote respectively the population mean and standard deviation of the weight of…

Q: Identify the population(s). Average number of Americans who consume alcohol. All individuals who…

A: Parameter: Parameter may be defined as which one is based on population

Q: developmental psychologist is interested in studying how long babies gaze at a photograph of a human…

A: Given data, 12, 15, 16, 20, 20, 27 Sort the data in ascending order. 12,15,16,20,20,27

Q: You measure the height of 10 people and come up with an average of 70 inches and a standard…

A: x=70s=4n=10 The t scores for 68 inches, t=68-xsn=68-70410=-1.581139

Q: Use the following data set (2,3,4,4,6,7,8,12) The variance=10.5 Find the standard deviation and…

A: We have given that,  The data set is,  2,  3,  4,   4,   6,   7,    8,   12 And variance = 10.5…

Q: Conduct a hypothesis testing for the results of the correlation between the writing skills and…

A: The concept of testing hypothesis is one of the method of statistical inference where we take the…

Q: A math class completes an exam and it is found that the class mean is 85 and the standard deviation…

A: The Chebyshev's theorem and Empirical rule is use to calculate the proportion or percentages of…

Q: A population has a mean μ = 71 and a standard deviation a=18. Find the mean and standard deviation…

A: List of formulae :  Mean of sampling distribution of the sample means :  μx¯ =μ Standard deviation…

Q: The scores on a standardized normally distributed with a mean of 95 and standard deviation of 10.…

A: Standardized z-score:   The standardized z-score represents the number of standard deviations the…

Q: A researcher collects the distances between survey respondents and the closest grocery store. The…

A:

Q: If you have a 99% confidence that a population proportion is in the interval from a to b, what does…

A:

Q: Determine the sample standard deviation.

A: Given  29.6 32.4 38.7 42.4 44.5 46.4 49.0 60.8 70.2 Now sample size (n) = 9…

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A: By empirical rule, 68% of data falls within one standard deviation. Thus, based on given info,…

Q: (Simplify your answer.) (Simplify your answer.)

A: It is given that  Mean, μ = 73 Standard deviation, σ = 6 Sample size, n = 36

Q: Use the magnitudes​ (Richter scale) of the 120120 earthquakes listed in the accompanying data table.…

A: Given that,120 magnitudes of earthquake,We want to find the range, variance and standard…

Q: display of data to find the standar

A: Given,

Q: Use the five-step procedure to test the research hypothesis that the mean weight in men in the…

A: H0 : ? =191 H1 : ? >191

Q: To find an 88% confidence interval for mean body temperature of healthy US adult women using the…

A: Sample mean, x¯ = 98.382 sample standard deviation = s = 0.712 sample size, n = 50 Here the sample…

Q: compare the breathing rate before and after breath holding. chose the correct statistical test what…

A: For comparing the breathing rate before and after breath holding , we will be measuring the…

Q: A researcher wants to determine if there is a significant difference in the amount of time it takes…

A: The objective of this question is to determine if there is a significant difference in the reading…

Q: What level of measurement do the variance and standard deviation assume?

A: Variance and standard Deviation tells about the spread or variation in the dataWe calculate the…

Q: the mean iq for the u.s. is 100 with a standard deviation of 15. a troy statistics professor thinks…

A: The objective of this question is to test the hypothesis that the mean IQ of Troy students is…

Q: Consider the data:  10, 7, 9, 13, 11, 13, 14.  (Show your work.) a)Determine the mean.…

A:

Q: Roll a pair of die 36 times, and draw a bar graph of all the outcomes. Using the data, find the…

A: In question,  Given that a pair of dice is rolled 36 times. Then we'll find mean Variance and…

Q: Using the following set of data (the same as in the previous problem), find the sample standard…

A: Given data, 8, 7, 11, 10, 10, 8 sample standard deviation=?

Q: ind the percentage of area under a normal curve between the mean and the given number of standard…

A: The mean and standard deviation of the standard normal distribution are 0 and 1.

Q: d. Determine the sample standard deviation. Round your answer to 2 decimal places. e. Determine the…

A: The data set are :- X :- 29.6 32.4 38.7 42.4 44.5 46.4 49.0 60.8 70.2 Then,  We will find sample…

Q: The smallest numeric value in a data set subtracted from the largest is the: a. variance. O b.…

A: We have to find the term which is the difference between the largest value and the smallest value.

Q: The Peabody  Picture Vocabulary Test has a standard score population mean of 100 and a standard…

A: The Peabody  Picture Vocabulary Test has a standard score population mean of 100 and a standard…

Q: Identify the data value corresponding to the indicated percentile. The amount of sleep an adult gets…

A: The normal distribution:A continuous random variable X is said to follow normal distribution with…

Q: - Calculate the Quartile Deviation (Q.D) and coefficient of Q.D. for the data below: ( 230 , 620 ,…

A: