In a study using 14 samples, and in which the population variance is unknown, thedistribution that should be used to calculate confidence intervals isA.) a standard normal distribution.B.) at distribution with 13 degrees of freedom.C.) at distribution with 14 degrees of freedom.D.) at distribution with 15 degrees of freedom.1.

population variance unknown with sample size n = 14

Answered: In a study using 14 samples, and in…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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b.
You are given the following information obtained from a random sample of 5 observations. Assume the population has a normal distribution 20 18 17 22 18 You want to determine whether or not the mean of the population from which this sample was taken is equal to 21. Determine the test statistic value?
3. Determine the following from the graph. Show all your work. a. Determine the mean and standard deviation: PDF of a Random Variable ū 6.09 COM 0.04 · b) Draw a qualitative sketch of the CDF of the distribution shown. Be sure to show axis values and key values that are appropriate! 0 10 c) What type of distribution was the PDF of a Random Variable?
A boat capsized and sank in a lake. Based on an assumption of a mean weight of 133 Ib, the boat was rated to carry 70 passengers (so the load limit was 9,310 Ib). After the boat sank, the assumed mean weight for similar boats was changed from 133 lb to 174 lb. Complete parts a and b below. a. Assume that a similar boat is loaded with 70 passengers, and assume that the weights of people are normally distributed with mean of 181.1 Ib and a standard deviation of 38.6 lb. Find the probability that the boat is overloaded because the 70 passengers have mean weight greater than 133 lb The probability isO: (Round to four decimal places as needed.) b. The boat was later rated to carry only 17 passengers, and the load limit was changed to 2,958 Ib. Find the probability that the boat is overloaded because the mean weight of the passengers is greater than 174 (so that their total weight is greater than the maximum capacity of 2,958 Ib). The probability is. (Round to four decimal places as needed.)…
A rental agent claims that the mean monthly rent, μ , for apartments on the east side of town is less than $650 . A random sample of 21 monthly rents for apartments on the east side has a mean of $643 , with a standard deviation of $22 . If we assume that the monthly rents for apartments on the east side are normally distributed, is there enough evidence to conclude, at the 0.05 level of significance, that μ is less than $650 ? Perform a one-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. The null hypothesis: H0: The alternative hypothesis: H1: The type of test statistic: (Choose one)ZtChi squareF The value of the test statistic:(Round to at least three decimal places.) The critical value at the 0.05 level of significance:(Round to at least three decimal places.) Using…
3
If our data is considered to follow a Normal distribution, then we would expect to find approximately a) 15% of observed values in the sample less than the first quartile b) 65% of observations in a sample in the inter-quartile range c) 95% of observations in a sample within two standard deviations of the mean d) 50% of observations in a sample within one standard deviation of the mean
Given a set of normally distributed scores with the mean of 20.00 and SD of 5.00, what proportion of scores are a) between 10 and 28 b) between 15 and 32
answer d)
a) To completely specify the shape of a Normal distribution, you must give which of the below: (A) The median and the quartiles (B) The mean and the standard deviation (C) The five-number summary b) What is the mean for the Normal Distribution shown? (A) 0 (B) 2 (C) 4 -8-6-4-20 24 6 8 10 12
Part 4. 1. Examine the data set below that represents a sample. A.) the average of the sample; B.) the median of the enéchantion; C.) the mode of the sample; D. ) the minimum and maximum values; J.) the extent; F.) the first, second and third quartiles; G.) the interquartile interval; H.) the standard deviation of the sample; I.) The variance of the sample.

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