Gülce spends 8 hours for Roblox per day. If the probability of spending less than 6 hours in a particular day is 16.11%, what is the standard deviation of the distribution? You are required to draw the grap

Find the proportion of Normally distributed observations with a zz-score above -2.84. Give your answer to four decimal places.

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Report the proportion you found in your physical sample as well as all the numbers you recorded from the virtual samples. Report anything you noticed about the way the graphs were shaped, how they were different as the sample size changed from 25 to 75 and how the means and standard deviations differed with the different sample size. Is a sample proportion more likely to be close to the population proportion with a larger sample size or with a smaller sample size?

For each problem, write which test you used in your calculator, draw the graph, calculate pvalue, and write your conclusion in a complete sentence. A simple random sample of 41 8th grade students found that the mean score on an exam is 250 with a sample standard deviation of 55. The school administration claims that the population mean for the school is less than 265. Is there enough evidence to support the claim?

A distribution of scores has no mode and the same median and mean values. This indicates that the

Explain what would happen if Person A scored lower than the mean of 70. Give an example exam score for that and calculate how many standard deviations Person A is above or below the mean

Pearson publishes textbooks each semester and the mean number of textbook pages published by Pearson for 2020 is 568 with a standard deviation of 150 pages.  What is the chance you will have to read a textbook published by Pearson in 2020 that has more than 733 pages? Write your answer as a percent.

Leave all probabilities as percentages. Define x on all problems with data. The number of patients coming into a dental clinic each day were 74, 52, and 83. a. Find the sample mean. b. Find the sample standard deviation. c. Find the population variance.

Find the are of the shaded region. The graph depicts the iq scores of adults and those normally distributed with a mean of 100 and a standard deviation of 15.    The graph is shaded ro the right with a number on the bottom 90