normal​ distribution

Q: A share is priced currently at $100. One year from now, there is a 50% chance that the share price…

A: Chance for increase and decrease are same = 50 % hence either price increase by 70% or price…

Q: The average retirement age in America is 65 years old. Do small business owners retire at an older…

A: c For the given sample values, x¯=68.0625, from the excel function, =AVERAGE(F1:F16)s=5.9830, from…

Q: The mean annual income of workers who are college graduates greater than 120,000.00 a year

A: Given problem Given that   The mean annual income of workers who are college graduates greater…

Q: ou When bears were anesthetized, researchers measured the distances (in inches) around their chests…

A: We have to find that which test is use...

Q: The magnitudes of earthquakes recorded in region of North America can be modeled by an exponential…

A:

Q: The graph depicts IQ scores of 102 and 128, normally distributed with mean 100 and standard…

A: Solution: Let X be the IQ score. From the given information, X follows normal distribution with mean…

Q: A manufacturer knows that their items lifespans are normally distributed according to…

A:

Q: Help understanding Find the z-score for which 80% of the distribution's area lies between -z and

A: Find the z-score for which 80% of the distribution's area lies between -z and z.

Q: The cost of items at a supermarket follow an exponential distribution. There are many inexpensive…

A: X~exp(λ=13)

Q: Data from 2007 measured the Incarceration Rate (i.e. number of people in prison per 100,000) for…

A: Given : R^2 = 41.4%

Q: Find the proportion of Normally distributed observations with a zz-score below 3.48. Give your…

A: Let Z be the random variable from standard normal distribution with mean (μ) = 0 standard deviation…

Q: How to create a frequency distribution?

A: Frequency of each class is obtained by counting the number of times each data point appeared in each…

Q: 3. The amount dispensed by the coffee machine follow the normal distribution with a mean of 5,286…

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Q: find the area of the shaded region. the graph to the right depicts IQ scores of adults and those…

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Q: Ecologists mapped a large Canadian forest plot dominated the Douglas fir, with an understory of…

A: a) Null hypothesis: H0: Species and life stage are independent.  Alternate hypothesis: HA: Species…

Q: The amount of time in years that an entry-level employee for a shipping company stays with the…

A: given data exponential distributionμ = 4.41λ = 14.41find 64th  percentile.

Q: The waiting time for a customer in line at the county recorder's office is exponentially distributed…

A: The question is about exponential distribution Introduction : If X is a continuous r.v which follows…

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

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Q: Describe about mean square between.

A: In ANOVA, “SS” stands for “sum of squares”, “df” stands for degrees of freedom, F is for the test…

Q: ) 5.2°F per month

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Q: The length of time running shoes last can be modeled by an exponential distribution. On average a…

A:

Q: Perform a multiple regression analysis on these data. Interpret the coefficient estimates and their…

A: Linear regression is the relationship between a scalar response variable and one or more explanatory…

Q: Explain the relationship between the Poisson and exponential distribution.

A: It is an application of probability distribution. It is widely used in statistics.

Q: The mean of the population is 50. The standard deviation is 10. If a person row score is 47 (a)…

A: The mean of the population is 50. The standard deviation is 10. If a person row score is 47 (a)…

Q: What is the 40th percentile of wait times for customers calling the help line?

A: Here given  Amount of time customer wait is exponentially distributed with mean 7.5 minutes

Q: Researchers fed mice a specific amount of Aldrin, a poisonous pesticide, and studied their nervous…

A: The provided information is as follows:The total number of mice is .The data set of five mice is…

Q: The amount of time spouses shop for anniversary cards can be modeled by an exponential distribution…

A:

Q: The following graph shows that the normal distribution A has greater variability than the normal…

A: Solution Z be standard normal variate with mean 0 and sd 1

Q: The average retirement age in America is 69.6 years old. Do small business owners retire at an age…

A:

Q: Based on historical data, on average, Hoboken experiences one flooding event every 2.4 month. Assume…

A: It can be assumed that the time between flooding events can be modelled using an exponential…

Q: The annual per capita consumption of ice cream (in pounds) in the United States can be approximated…

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Q: The manager of a supermarket tracked the amount of time needed for customers to be served by the…

A: From the provided information, The checkout times are exponentially distributed with a mean of 5…

Q: Total blood volume (in ml) per body weight (in kg) is important in medical research. For healthy…

A: (a) Determine the level of significance.   State the hypotheses. The tail of the test is two…

Q: Multiple myeloma, or blood plasma cancer is characterized by increased blood vessel formulation…

A: The data in the table below represent the bone marrow micro-vessel density for patients who had a…

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

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Q: According to the normal model what is the probability that the percent change in worker output per…

A: Given that, the data have a normal model with parameters: Mean = 3.4 sd = 3.1

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.