In the population, the mean SAT score is 1000. Would you be more likely (or equally likely) to get a sample mean of 1200 if you randomly sampled 10 students or if you randomly sampled 30 students? Explain.

Q: According to a gallup survey of boys 77% of boys had played computer games in the past week compared…

A: Let p1 be the percentage of boys had played computer games  p2 be the percentage of girls had played…

Q: Karen wants to estimate the mean number of siblings for each student in her school. She records the…

A: The sample is the sub-part of the population. Karen wants to estimate the mean number of siblings…

Q: How large a sample should be surveyed to estimate the true proportion of college students who surf…

A:

Q: The mean of a sample is 40. What will the mean become if a) 9 points are added to each score? b) 18…

A:

Q: Suppose that the mean score of a class of 33 students was 80. The 17 male students in the class had…

A:

Q: much does the mean score tell you about the performance of the whole class?

A: Averages are tools of summarizing data, it facilitates the comparison. Different averages are…

Q: One sample has n = 6 and M = 10. A second sample has n = 4 scores with M = 15. If the two samples…

A: Combined mean = n1x1¯+n2x2¯n1+n2

Q: When the Standard Score = -1, what is the percentile of the raw score? %3D O 2nd 14th O 16th 34th…

A: It is an important part of statistics. It is widely used.

Q: A teacher found that the mean number of hours her 12 students spent studying for an AP Statistics…

A: old mean for 12 students = 6.7 sum of 12 students = 6.7*12 = 80.4

Q: A recent survey by the U.S. Census Bureau determined that the median monthly housing rent was $631.…

A:

Q: A sample mean has a z= -4.0 on the sampling distribution created from the population of psychology…

A:

Q: The mean and SD calculated from 20 items are 15 and 10 respectively. If an additional observation 36…

A:

Q: The owner of a local bar specializing in alternative music wanted to determine the average age of…

A: t 95% confidence level, the z value is 1.96 which can be obtained by using the standard normal…

Q: A recent study by the u.s. census bureau determined that the median monthly housing rent was $641.…

A: The median is middle value of the observations, above or below which 50% of the observations lie.…

Q: What is the mean for the combined set if both of the original samples have n = 4 scores? What is the…

A: Given that For sample 1, mean M1 = 8 For sample 2, mean M2 = 16

Q: A population has a mean of μ = 40. If 5 points are added to each score, what is the value for the…

A: Let a population has n units,X1,X2,....,Xn.Then the total sum of the population is S=X1+X2+...+Xn.…

Q: If the mean number of people who attended six basketball games is 10230, what was the total…

A:

Q: The mean salary of twelve men is $52,000, and the mean salary of four women is $85,000. Find the…

A: From the given information,

Q: A simple random sample of 28 observations was taken from a large population. The sample mean equaled…

A: It is given that, a simple random sample of 28 observations was taken from a large population with…

Q: The mean salary of twelve men is $55,000, and the mean salary of four women is $85,000. Find the…

A: Mean or Average :

Q: A class of 5 students averaged 70% on a given test. A class of 9 students averaged 80% on the same…

A: Introduction: Suppose there are k groups numbered 1, 2, 3, …, k – 1, and k.

Q: A data set is described as consisting of n = 15 scores. Based on the notation being used, the data…

A: We have the following statement .

Q: Forty students took a final exam on which the passing score was 70. The mean score of those who…

A: Given that, forty students took a final exam on which the passing score was 70. The mean score of…

Q: The mean score on a set of 15 tests is 75. Suppose two more students take the test and score 68 and…

A:

Q: estimate the sample size

A: An estimate of sample size: The appropriate sample size for estimating the mean of a variable from…

Q: If you increase the sample size to 50 from 30, will the standard error of the mean be smaller or…

A: When increasing the sample size to 50 from 30, the standard error of the mean would be smaller…

Q: The Taylors have recorded their weekly grocery expenses for the past 16 weeks and determined that…

A:

Q: Ten HR majors had an average grade of 94 on an exam. Fourteen business majors averaged 86, while six…

A: Given problem Given that   Ten HR majors had an average grade of 94 on an exam. Fourteen business…

Q: Does the sample size have an effect on the mean of all possible sample means? Explain your answer.

A:

Q: In each of Exercises, explain the effect on the margin of error and hence the effect on the accuracy…

A: Formula for the margin of error is given by

Q: Suppose that the mean score of a class of 32 students was 77. The 18 male students in the class had…

A: We have given that  Mean score of 32 students=77 Mean score of 18 male students=68 Find the  mean…

Q: the mean number of people who attended three basketball games was 8648, what was the total…

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Q: The mean purchase total is $93.80 and the median purchase total is $75.80. The store manager…

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Q: In a 100- item test, the score of Student C is 1/2 SD above the mean. Mean is 50 and SD is 4.8. What…

A: 13. The mean is 50 and standard deviation is 4.8.

Q: If the mean number of people who attended four basketball games is 7380​, what was the total…

A:

Q: In each of Exercises, explain the effect on the margin of error and hence the effect on the accuracy…

A: Effect on margin of error:If the sample size decreases, then the standard error of statistic…

Q: Suppose that the mean score of a class of 35 students was 74. The 18 male students in the class had…

A:

Q: The mean salary of twelve men is $57,000, and the mean salary of four women is $87,000. Find the…

A: The provided information are: Mean salary of 12 men = $57000 Mean salary of 4 women = $87,000 The…

Q: Previously, an organization reported that teenagers spend 8.5 hours per week, on average, on the…

A: Given information: The data represents the number of hours per week teenagers spend on the phone.

Q: Suppose we measure GPA for people in our class, we find the mean is 2.8 and the median is 3.2. What…

A: Given: Mean = 2.8 Median = 3.2

Q: What would be the mean of the proportion of homeowners in this sample who prefer a finished…

A: The sampling distribution of p-hat (sample proportion) is approximately normal with mean p and…

Q: A population with a mean of 8 has a sum of 40. How many scores are in the population?

A:

Q: NebNas manages the credit department for a grocery store chain in the province, and she would like…

A: From the given information, n=100x¯=101.5s=25.6μ=95 Given claim is the mean balance is different…

Q: The cighth grade girls' basketball team played a total of 13 games this season. If they scored a…

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Q: Describe how you would pick a sample for an interview. ng. (St-

A: here total 1950 student in school and here systematic sampling method is used

Q: The national profession exam for registered nurses, the NCLEX, has pass a rate of 85% for the first…

A: According to the given information in this question It follows binomial distribution with parameters…

Q: The mean salary of ten employees is 32,000.00 and the median is 30,000.00. The highest paid…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.