The distribution of average hours worked per week for random samples of 1000 workers in the U.S.has a mean of 40 and a standard error of 0.04The distribution in this scenario is a:sampling distributionsample distributionpopulation distribution

Basics: Sampling Distribution: A Sampling distribution of sample means is a distribution obtained…

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A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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According to the Carnegie unit system, the recommended number of hours students should study per unit is 2. Are statistics students' study hours different from the recommended number of hours per unit? The data show the results of a survey of 15 statistics students who were asked how many hours per unit they studied. Assume a normal distribution for the population. 1.7, 3.7, 1.6, 0.8, 4.6, 3.7, 4.2, 1.1, 0.7, 2.5, 2.5, 2.8, 3.8, 1.7, 3.7 What can be concluded at the αα = 0.10 level of significance? The null and alternative hypotheses would be: Please provide number H0:H0: mean = __?___ H1:H1: mean not equal to __?__ The test statistic t= __?__ (please show your answer to 3 decimal places.) The p-value = __?__ (Please show your answer to 4 decimal places.)
Calculate the sample mean and sample variance for the following frequency distribution of heart rates for a sample of American adults. If necessary, round to one more decimal place than the largest number of decimal places given in the data. Heart Rates in Beats per Minute Class Frequency 56-62 10 11 5 12 7 63-69 70-76 77-83 84-90
Find the mean,median,and mode for the following frequency distribution table x 5,4,3,2,1,0 f 2,5,2,3,0,2
Find sample variance and standard deviation for thefollowing frequency distribution. Class f5.5 – 10.5 210.5 – 15.5 315.5 – 20.5 520.5 – 25.5 425.5 – 30.5 230.5 – 35.5 2
The table below shows the frequency distribution of the rainfall on 52 consecutive Wednesdays in a certain city. Use the frequency distribution to construct a histogram. Do the data appear to have a distribution that is approximately normal? Class 0-0.19 0.20 -0.39 0.40 -0.59 0.60 -0.79 0.80 -0.99 1.00-1.19 1.20 - 1.39 Frequency 21 10 6 3 7 4 1 Choose the correct histogram below. O A. O B. O C. 30- 20 10- 0- 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 30- 20- 104 0-F 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 30 20- 10- 0- 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Q Q Q G Q Q M
3) What graphs can help us identify a normal distribution? a. Dotplot b. Histogram c. Boxplot d. Normal probability plot pick one a, b, c, d b, c a, b a, b, c b, d
Sample Size. How does the sample size affect how close to a normal distribution of either sample means or sample proportion will be?
Compute for the mean and variance of the given frequency distribution below: Score Number of Students 5 3 8 5 10 4 12 5 15 3
Topic 4 Practice Test 1. What characteristics must a normal probability distribution have to be a standard normal probability distribution? 2. Find the shaded area under each standard normal curve shown below: a. a. b. b. 3. Find the z-score corresponding to the shaded area under each standard normal curve shown below: Area = 0.2546 z = -0.9 Area = 0.9798 z = 0.75 z = 1.6
According to the Carnegie unit system, the recommended number of hours students should study per unit is 2. Are statistics students' study hours less than the recommended number of hours per unit? The data show the results of a survey of 13 statistics students who were asked how many hours per unit they studied. Assume a normal distribution for the population. 0.7, 1.8, 1, 0.6, 3, 0.9, 0.9, 1, 3.2, 1.5, 0.1, 0.1, 3.2 What can be concluded at the αα = 0.10 level of significance? The test statistic = ___________ (please show your answer to 3 decimal places.) The p-value = ____________ (Please show your answer to 4 decimal places.)
Need help with this one in part D.
Normal probability plots for three data sets are shown below. Which plot indicates that the data are approximately normally distributed? C. A. O O O O Plot B Plot A Plot C Plots A and B B. Q ME

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The distribution of average hours worked per week for random samples of 1000 workers in the U.S. has a mean of 40 and a standard error of 0.04 The distribution in this scenario is a: sampling distribution sample distribution population distribution