Find the proportion of Normally distributed observations with a z-score below 2.56. Give your answer to four decimal places.

Q: Find the percentage of data points that lie between -2.31 and 1.85.

A: Assuming the data follows standard normal distribution with mean 0 and standard Deviation 1Finding…

Q: Determine the two values of z such that the middle 58% of the data lie between the two z-values.

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

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Q: Determine the percent of data greater than z=−1.40.

A: Know that  X~N( 0 , 1 )   μ=0  , ?=1 (for standard normal distribution)    Z-score =( x - μ )/?

Q: Find the mean, 80th percentile and standard deviation: 2,-3,7,5,-2,3

A: Solution-: Given data: 2,-3,7,5,-2,3 We want to find, (a) The mean=? (b) The 80th percentile=? (c)…

Q: What proportion of z scores lie beteeen -2 and +2 in the height in inches data set? Round your…

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Q: The heights of a group of men averaged 69 inches and followed the normal curve. The 91st percentile…

A: Solution: Let X be the height of group of men. μ= 69 inches  Average height of men.  The 91st…

Q: Data table Atmospheric Carbon Dioxide Concentrations (in parts per million) 323.4 325.6 338.4 339.4…

A: Answer :

Q: Use a z-Table to determine the percent of data specified. Round to the nearest hundredth. Greater…

A: A z-table, also known as a standard normal table, is a table that shows the area under the standard…

Q: Could the graph represent a variable with a normal distribution? Explain your reasoning Select the…

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Q: Calculate the 3rd quartile, 9th decile and 46th percentile c the distribution

A: The partition is the measure which divide the data set into equal number of parts. Some of the…

Q: Find the percent of 16/20 and 4/20. What are the relationships between the answers?

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Q: According to www.experian.com, the average FICO score in the United States was around 703 in…

A: The first step is to arrange the data provided in an ascending order.  Ascending order is -…

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

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Q: Find the z-score that separates the largest 5% of scores from the rest.  Round your result to 3…

A: Obtain the z-score that separates the largest 5% of scores from the rest. The z-score that separates…

Q: Q2. Find the standard deviation for the data: 5,10,7,12,0,20 7

A: We have to find the standard deviation for the data: 5,10,7,12,0,20

Q: ould have the right to marry. (The 2014 data were collected before the 2015 US upreme Court decision…

A: There are four types of level of measurement, i.e.,  Ratio scale: data is continuous and have a…

Q: Find the absolute and percent relative uncertainty

A: Absolute relative uncertainty is the ratio of the uncertainty to the reported value. For example, if…

Q: distribution of the height of a tomato plant is normal with population mean of 50 inches. The 80th…

A: Provided data is, distribution of the height of a tomato plant is normal with population mean of 50…

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: 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: 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: A streaming platform contains thousands of movies. The average movie length across all the movies is…

A:

Q: A school organization would like to sell cupcakes for fund raising. Its members gathered data on the…

A: Regression shows the relationship b/w an independent variable and a dependent variable.

Q: A box contains 55 red cookies, 30 blue cookies, and  100 green cookies.  Find the relative frequency…

A: Given: Number of red cookies=55 Number of blue cookies=30 Number of green cookies=100   Total number…

Q: find the value between z score -2.9 and 1.5287

A: To find: Find the value between z score -2.9 and 1.5287

Q: The table represents the number of minutes of commercials during hour- long TV shows. Find the…

A: Given that Table for no. of minutes of commercials during hour long TV shows. No. of mins 12 13.5…

Q: q11- Median is which percentile of the data? Select one: a. 25th. b. 50th. c. 75th. d. 80t

A: b. 50th

Q: Sarah​'sscore on the Stats midterm was 81 points. The class average was 76 and the standard…

A: Given that  Mean = 76 SD = 5 And the Sarah's score is X = 81

Q: A company gives the percentage of defective products as 6% or less. Use the sample below to…

A: Given: p0=0.06n=50x=5 The significance level is taken as 0.05.

Q: Find the z-score that corresponds to the 63rd percentile

A: we have to find the Z-score that corresponds tothe 63rd percentile.

Q: The 20th percentile is how many inches?

A: The mean is 64 inches and the standard deviation is 2.5 inches.

Q: The percentile gives an indication of the relative position of the scores. True or False?

A: Partition values are the values which divide the series into a number of equal parts.  * Three…

Q: 2. Consider the familial aggregation of cholesterol levels. Suppose cholesterol levels are assessed…

A: To test for the equality of the mean cholesterol levels of the two groups using R, we can perform an…

Q: ind the percentile rank for each test score in the data set. Ribs to the nearest whole percentile.…

A: Given data, 5,10,15,23,26,30,35    The percentile rank for the value 5 is?

Q: uppose you go to the grocery store and spend $92.54 for the purchase of 12 items . What is the mean…

A: Given that  Amount spent  = $92.54 Number of items bought = 12     We know that  Mean amount =…

Q: Draw a left skewed curve. Is this a negative or positive curve? Identify where you would expect the…

A:

Q: 4. Find the percentage of data points that lie below z = 1.46. Draw a picture to support your work.

A: The provided z-value is 1.46. The probability of data points that lie below this value can be…