945 Answered Questions for the topic Statistics Question

Statistics Question

07/02/18

Calculate the sample standard deviation and sample variance for the following frequency distribution of final exam scores in a statistics class. If necessary, r
Final Exam ScoresClass Frequency51 - 60 661 - 70 1171 - 80 681 - 90 1191 - 100 4 Calculate the sample standard deviation and sample variance for the following frequency distribution of final exam... more
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Statistics Question

07/01/18

Assume that a procedure yields a binomial distribution with n trials and the probability of success for one trial is p. Use the given values of n and p to find
Assume that a procedure yields a binomial distribution with n trials and the probability of success for one trial is p. Use the given values of n and p to find the mean muμ and standard deviation... more
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Statistics Question

06/30/18

finding the test statistic and P Value given a set of data
Listed below are the lead concentrations in mug/g measured in different traditional medicines. Use a 0.10 significance level to test the claim that the mean lead concentration for all such... more
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Statistics Question

06/28/18

stats questions
A random sample of 159 full-grown lobsters had a mean weight of 18 ounces; the standard deviation of weights of all lobsters is thought to be σ = 2.8 ounces.Use this data to construct a 98 percent... more
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Statistics Question Simple Random Sample

06/28/18

Simple random sample exercise using α= 5%
One company manufactures steel parts whose diameters follow a normal distribution with μ = 0.5 mm and σ^2 = 0.0784 mm^2. With the aim of increasing homogeneity in production, without modifying the... more
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Statistics Question

06/21/18

Percentages and probabilities
A retail shop accepts only cash or checks. Suppose that % of its customers carry cash, % carry checks, and % carry cash or checks (or both). What is the probability that a randomly chosen customer... more
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Statistics Question Homework Due Tomorrow

06/20/18

statistics homework question
The mean weight of a sample of 201 pigs is 6.7 pounds with a population standard deviation of 1.6 pounds. Construct a 90% confident interval for the true mean of all pigs. Write a sentence... more
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06/16/18

Homework Help really struggling
Question 6    Which of the following is NOT TRUE concerning the graphic depiction ("the curve") of a distribution for means?Question options: A) The curve is skewed to the right.  B) The area under... more
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Statistics Question

06/11/18

Probability of an event that is impossible
What is the probability of an event that is impossible? Suppose that a probability is approximated to be zero based on empirical results. Does this mean that the event is impossible?What is the... more
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Statistics Question Statistics Math Help

06/09/18

Is anyone willing to help I have submitted this twice and receive no feedback
A big-brand-name dishwasher, which costs $800.00, has a 20% chance of needing to be replaced in the first 2 years of purchase.  A two-year extended warranty costs $112.10 on a dishwasher.  What is... more
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Statistics Question

06/08/18

If you want to be 99% confident of estimating the population proportion to within a sampling error of +-0.05, what sample size is needed?
sample size needed
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Statistics Question

06/04/18

The Empirical Rule
The Empirical Rule indicates that we can expect to find what proportion of the sample included between ± 1 standard deviation?
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Statistics Question

06/04/18

formula difference
What differentiates the two formulasΣ (x – xbar)^2/n-1 from Σ (x – µ)^2/n,and why the difference?
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Statistics Question

06/04/18

Median price rather than the Mean
houses prices are usually reported as the Median price rather than the Mean (average) price. Why would this be true for a set of prices like: $120,000; $125,000; $110,000; $199,000; $100,000?
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Statistics Question

06/04/18

what is the probability in a given month
Assume that cases of mumps are random and independent and the number X of monthly mumps cases in Michigan has approximately the Poisson distribution with  = 0.2.  What is the probability that in a... more
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Statistics Question Statistics Statistical Method

06/01/18

Stat could someone please help with this urgent
What is an example of when you would want consistent data and, therefore, a small standard deviation?Example: Race-car DriverSmall Standard Deviation: Understanding RPM and when to change gearsThe... more
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Statistics Question Statistics

05/30/18

How to calculate percent from mean and standard deviation
The daily energy intakes of children follow a normal distribution with a mean of 1123 kcal and a standard deviation of 214 kcal. The recommended minimum daily intake is 1700 kcal. What percent of... more
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Statistics Question

05/28/18

If a club consists of 18 members how many different arrangements of president vice president and secretary are possible
If a club consists of 18 membees how many different arrangements of president,Vice President, and secretary are possible?
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Statistics Question

05/28/18

how many ways can 3 students sit in a row of 21 chairs
how many ways can 3 students sit in a row of 21 chairs for a photograph
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Statistics Question

05/26/18

): In this scenario, why didn’t the researcher just pick 10 employees that she knew would be easy to work with on this project? That is, why is randomization i
Statistics
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Statistics Question

05/23/18

The month of the year is December. What is the type of data is December?
Is it categorical discrete or continuous data
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Statistics Question Math Help Standard Deviation

05/22/18

standard deviation
whats the standard deviation of the data set below, Rounding your answer to three decimal places?2, 4, 6, 6, 8, 10, 11, 12, 14, 16, 17, 18, 18, 18
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Statistics Question Probability

05/19/18

how to solve this question
Over a long period of time in a large multinational corporation, 10% of all sales trainees are rated as outstanding, 75% are rated as execellent/good, 10% are rated as satisfactory, and 5% are... more
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Statistics Question

05/18/18

mean noise level in 171 randomly selected ward area 58.0 decibelsthe population standard deviation 4.8. Find the 90% confidence interval of the true mean.
i need help with this question and many others and im hoping you can help me thanks
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Statistics Question

05/11/18

Need assistancewith the foolowing question.
 The female death rate in Britain in 2009 was 49.3 per 100 000 of population and the male death was 71.2 per 100 000. Given that the population of Britain was 61 113 295, how many more male deaths... more
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