State the point estimate for each of the following examples. a) A researcher records the following...
State the point estimate for each of the following examples. a) A researcher records the following values: 12,8,10,12,17,11, and 14. ( I just need the solutions for e-h )
b) The time it takes to complete a behavioral task is 32 +/- 2.4s (M +/- SEM).
c) Researchers measure scores in two related samples. Participants in Sample 1 scored 8.2 points and in Sample 2 scored 4.6 points.
d) Distance that participants stood from an attractive confederate was closer than predicted, 95% CI [14,26].
State the interval estimate that contains more possible values of the population mean ( precision ) for each of the following examples.
e) a 90% CI or a 95% CI for the same data
f) An 80% CI for a distribution with 12+_1.2 (M+-σM) or 12+_ 1.2 (M+_ SM)
g) A 90% CI for a distribution with 18+_ 3.0 ( M+_SM) or 18+_3.0 (M+_ SM1-M2) The sample size is 40 for each distribution.
h) A 95% CI for a distribution with 103 +_ 14.0 ( M+_ SMD) or 98+_14.0 (M+_ SMD). The sample size is the same for each distribution.
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State the point estimate for each of the following examples. a)
A researcher records the following...
A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size...
A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.04 with 99% confidence if (a) she uses a previous estimate of 0.54? (b) she does not use any prior estimates? Х i Table of critical values Click the icon to view the table of critical values. (a) n= (Round up to the nearest integer.) Level of Confidence, (1 - «). 100%...
-P2) for each of the following situations. 0.7 and p2 Assuming that n-n2, find the sample sizes needed to estimate (p a...
-P2) for each of the following situations. 0.7 and p2 Assuming that n-n2, find the sample sizes needed to estimate (p a. A margin of error equal to 0.08 with 99% confidence. Assume that p1 02. b.A 90% confidence interval of width 0.97. Assume that there is no prior information available to obtain approximate values of p,and p2 C. A margin of error equal to 0.05 with 90% confidence. Assume that p1 0.88 and p2 0.8. a. What is the...
Need f-e a large airine wants to estimate r. To accomplish this, the 2) Unoccupied seats...
Need f-e
a large airine wants to estimate r. To accomplish this, the 2) Unoccupied seats on flights cause airtines to lose revenue. Suppose its average number of unoccupied sests per flights over the past yea records of 225 flights are randomly selected, and the number of unoccupied seats is noted for each of the sampled flights. Descriptive statistics for the data are as follows: 11.596 and s 4.103. Give a point estimate for the target parameter u. What symbol...
1. For each of the following, select the best answer and circle it. a) What is...
1. For each of the following, select the best answer and circle it. a) What is a for a 60% confidence level? 40 20 0.4 L 0.2 0.04 0.02 b) Find the critical t-values corresponding to a 60% confidence level, with n = 27. +0.856 +2.162 2.158 +1.315 0.855 +1.314 c) What are the critical t-values for a confidence interval if a = 0.10 and n = 35? +1.307 1.691 2.728 +1.690 +2.724 +1.306 d) What confidence level would use...
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Single Sample t-Test Coach Brown is training his runners for an upcoming race, but he is concerned about their pace. He takes down sample times from his top 7 runners to compare it to his all-time standard race speed of 7.9 minutes per kilometer (μ). The sample times from his runners were 8.55 minutes per kilometer (M) with a standard deviation estimate of 0.78 (s). Based on this data, complete the six steps of hypothesis testing given that our research...
1.) 2.) 3.) 4.) 5.) An advertising executive wants to estimate the mean weekly amount of...
1.)
2.)
3.)
4.)
5.)
An advertising executive wants to estimate the mean weekly amount of time consumers spend watching traditional television daily. Based on previous studies, the standard deviation is assumed to be 23 minutes. The executive wants to estimate, with 99% confidence, the mean weekly amount of time to within + 6 minutes. a. What sample size is needed? b. If 95% confidence is desired, how many consumers need to be selected? a. The sample size required for...
Research question: In the population of all American adults, how strong is the relationship between age...
Research question: In the population of all American adults, how strong is the relationship between age and reaction time? Data were collected from a representative sample of 500 American adults concerning their ages (in years) and reaction times (in milliseconds). What procedure should be used to estimate the strength of this relationship in the population? CI for single mean CI for single proportion CI for difference in means CI for difference in proportions CI for correlation 2Research question: To what...
The shear strength of each of ten test spot welds is determined, yielding the following data...
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part 3 please In this project, you will collect a sample of plain M&M's, summarize your...
part 3 please
In this project, you will collect a sample of plain M&M's, summarize your sample data and compare it to the MARS Company's claims. See below for the distribution claimed by the MARS Company Claimed by MARS Company PLAIN M&M'S Color Distribution in One Package Blue 24.0% Brown 13.0% Green 16.0% Orange 20.0% Red 13.0% Yellow 14.0% PARTI - Summarizing and Graphing Data 1. For your sample data, organize the information in a distribution table categorized by color....
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A sample of 10-year-old children found that they receive the following weekly allowances: $6, $1, $2, $10, $4, $3, $9. What is the sample mean? Answer choices: $4, $5, $6, $7 114 out of 150 customers at a bank said that they prefer to use ATMs rather than going to a live teller. What is the sample proportion of bank customers who prefer to use ATMs? Answer choices: 0.68, 0.72, 0.76, 0.80 Which sample size would give the best estimate...
A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.04 with 99% confidence if (a) she uses a previous estimate of 0.54? (b) she does not use any prior estimates? Х i Table of critical values Click the icon to view the table of critical values. (a) n= (Round up to the nearest integer.) Level of Confidence, (1 - «). 100%...
-P2) for each of the following situations. 0.7 and p2 Assuming that n-n2, find the sample sizes needed to estimate (p a. A margin of error equal to 0.08 with 99% confidence. Assume that p1 02. b.A 90% confidence interval of width 0.97. Assume that there is no prior information available to obtain approximate values of p,and p2 C. A margin of error equal to 0.05 with 90% confidence. Assume that p1 0.88 and p2 0.8. a. What is the...
Need f-e
a large airine wants to estimate r. To accomplish this, the 2) Unoccupied seats on flights cause airtines to lose revenue. Suppose its average number of unoccupied sests per flights over the past yea records of 225 flights are randomly selected, and the number of unoccupied seats is noted for each of the sampled flights. Descriptive statistics for the data are as follows: 11.596 and s 4.103. Give a point estimate for the target parameter u. What symbol...
1. For each of the following, select the best answer and circle it. a) What is a for a 60% confidence level? 40 20 0.4 L 0.2 0.04 0.02 b) Find the critical t-values corresponding to a 60% confidence level, with n = 27. +0.856 +2.162 2.158 +1.315 0.855 +1.314 c) What are the critical t-values for a confidence interval if a = 0.10 and n = 35? +1.307 1.691 2.728 +1.690 +2.724 +1.306 d) What confidence level would use...
1.)
2.)
3.)
4.)
5.)
An advertising executive wants to estimate the mean weekly amount of time consumers spend watching traditional television daily. Based on previous studies, the standard deviation is assumed to be 23 minutes. The executive wants to estimate, with 99% confidence, the mean weekly amount of time to within + 6 minutes. a. What sample size is needed? b. If 95% confidence is desired, how many consumers need to be selected? a. The sample size required for...
The shear strength of each of ten test spot welds is determined, yielding the following data (psi). 409 393 358 361 367 362 374 389 375 415 (a) Assuming that shear strength is normally distributed, estimate the true average shear strength and standard deviation of shear strength using the method of maximum likelihood. (Round your answers to two decimal places.) average 380.3 psi standard deviation psi (b) Again assuming a normal distribution, estimate the strength value below which 95% of...
part 3 please
In this project, you will collect a sample of plain M&M's, summarize your sample data and compare it to the MARS Company's claims. See below for the distribution claimed by the MARS Company Claimed by MARS Company PLAIN M&M'S Color Distribution in One Package Blue 24.0% Brown 13.0% Green 16.0% Orange 20.0% Red 13.0% Yellow 14.0% PARTI - Summarizing and Graphing Data 1. For your sample data, organize the information in a distribution table categorized by color....
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