You are conducting a study to see if the average male life expectancy is significantly different from 94. Your sample data (n = 8) produce the test statistic t = 3.14. Find the p-value accurate to 4 decimal places.

Q: esearch scientist wishes to test the claim that the mean number of units taken by community college…

A: From the given information, We see that no information about the normality of the population is…

Q: Find the z-score that cuts off 70% in the body on the right.

A:

Q: In 1980 and again in 2010, a Gallup poll asked a random sample of 1000 US citizens "Are you in favor…

A:

Q: e whether each statement is true or false and briefly explain your answer  You have a sample of 100…

A: It is given that we have a sample of 100 observations from a Normal distribution with an unknown…

Q: Find the proportion of Normally distributed observations with a zz-score below -1.53.

A: It is given that the z-score below -1.53.

Q: Give the value of the test statistic. (Enter your answer rounded to two decim

A: Excel Procedure: Enter the data of No odor in column A. Enter the data of lavender in column B.…

Q: I surveyed a sample of 68 customers in a business to see how much they spend in there.  Would this…

A: Parameter: Any statistical measure based on all units in the population is called Parameter.…

Q: You are estimating the mean size of farms in New Hampshire.  You want your 95% CI to have a margin…

A: The formula for the sample size is as follows:

Q: Many athletes (and their parents) worry about the risk of concussions when playing sports. A…

A: First let us sort the head circumferences (in inches) for the players on the team; No. Head…

Q: The ETS Verbal Aptitude Test is designed so that the scores of high school seniors taking the test…

A: It is given that mean is 500 and standard deviation is 87.

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: Find the z-score that cuts off 65% in the body on the left.

A:

Q: If a person’s z score equals -2.02, what is their percentile?

A: Given problem Given that   Given Person's z score =  -2.02 Using the Standard Normal Table ( Z Table…

Q: Develop your idea about quartile. The following data refers to the monthly starting salaries in Taka…

A: The first quartile (or lower quartile or 25th percentile) is the median of the bottom half of the…

Q: We have provided simple data sets for you to practice the basics of finding a a. population mean. b.…

A: The given data is 2, 5, 0 and –1.

Q: Your instructor has the Mid-Term examination grades. He told you that the 25th percentile is 51 and…

A: Given that, Your instructor has the Mid-Term examination grades. He told you that the 25th…

Q: What proportion of z scores lie between -1 and +1 in the "height in inches" data set?

A: We have to find the probability such that P(-1 < Z < 1)

Q: You have collected a simple random sample of 39 students. On average (the average here is measured…

A: In this case, the minimum amount spent on books is $398 and maximum amount is $804.

Q: Jse the histogram above to make the following calculations: Mean: Median: lariance: Standard…

A: From provided histogram, table for frequency distribution is: Classes Frequency 964 – 976…

Q: What proportion of z scores lie between -3 and +3 in the height in inches data set

A: We have to calculate P(-3 < Z < 3)

Q: Fimd the Z score associated with the 15th percentile.

A:

Q: what percent of the total population is found between the mean and the z-score given? z=3.58

A: We have given that. Standard normal.  X~N( 0 , 1 )   μ =0  , ? =1   Z-score =( x - μ )/?   z= 3.58

Q: We are asked to find the values that separate the middle 60% of the population from the top and…

A: In a normal distribution, the z-score is a measure of how many standard deviations an element is…

Q: isn't it should use the normal table to find z value?

A:

Q: what range of raw scores makes up the middle 40%

A: The middle 40% means, the scores lie between 30th and 70th percentile. From stand normal, z-score…

Q: student scored in the 75th percentile on the SAT. What does that mean?

A:

Q: IQ is normally distributed with a mean of 100 (SD = 15). What score would a person need to be in the…

A: Let X denote the IQ scores and it follows normal distribution with mean of 100 and standard…

Q: The length of time a person shops for groceries can be modeled by an exponential distribution with…

A: Given, Let X be the length of time. X is exponentially distributed Average= 27 mins

Q: in how you determined your findings. How many children scored lower than Emily? How many children…

A: The standard normal variate of the normal distribution is continuous and follows that z~N(0,1). The…

Q: Which statistic would you use if you are interested in comparing the mean number of hours worked by…

A: In this study, the mean number of hours worked by sex(men and women) are interested in comparing.…

Q: What is the percentile rank x=15 and what is the score for 75th percentile?

A: If the we have no of scores is 15 then we have formula for percentile rank as:…

Q: If a person’s z score equals 2.08, what is their percentile?

A: Given info: The person’s z score equals 2.08.

Q: Find the proportion of Normally distributed observations with a zz-score above -2.84. Give your…

A: Given the proportion of Normally distributed observations with a z-score above -2.84

Q: on a 100 item test romel got a score of 88 which is the 9th decile what does it mean

A: Di = i * (n + 1)  10 th data

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: what is a z-score of 80%?

A: 80% z score:  alpha=1-0.80           =0.2 alpha/2=0.2/2               =0.1  From standard normal…

Q: The number of hours per week that the television is turned on is determined for each family in a…

A: Given that there are 24 families in the sample.  Mean=31 Median=27.2 7th percentile= 16 hours

Q: You were creating a run chart using non- metric data and found that n_1 for run-ups was 14, and n_2…

A: