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Use the appropriate normal distribution to approximate the resulting binomial distributions. A convenience store owner claims that 55% of the people buying from her store, on a certain day of the week, buy coffee during their visit. A random sample of 35 customers is made. If the store owner's claim is correct, what is the probability that fewer than 24 customers in the sample buy coffee during their visit on that certain day of the week?
Calculate the t test statistic. Can you reject ρ = 0? (e) Use Excel's function =TDIST(t,deg_freedom,tails) to calculate the two-tail p-value.
Determine the probability distribution associated with these data.
131 are enrolled in both economics and mathematics course. Determine the probability that freshman selected at random from group is enrolled in each of the following?
The Ntional Lightning Detection Newtowk uses automatic sensors to watch for lightning in areas of 10 square kilometers. What are the mean and standard deviation of the total number of lightning strikes observed?
What is the Standard Deviation of the Probability Distribution that would list the number of students (from 0 to 92) and the probability of each. If the answer cannot be calculated
Please summarrize, find the most important formulas, and explain a solve problem for each of this statictics topics: A. Simple regression and correlation B. Multiple regression and correlation
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
In this research report you will be analysing a set of data of which can be found in an EXCEL file available for download in the Assessment section of the Blackboard site.
A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 175 and a standard deviation of 15. If an applicant is randomly selected, find the probability of a rating that is between 150 and 200.
A stationary store wants to estimate the mean retail value of greeting cards that it has in inventory A random sample of 100 greeting cards. a mean value of 2.55 and standard deviation of 0.44
According to Chebyshev's Theorem, how many students scored between 23 and 95?
Discuss three measures of central tendency for the dependent variable. Is this distribution skewed? If so, in what direction? Explain your answer. Why would you NOT attempt to determine the central tendency of the independent variables?
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