University Dean wishes to estimate the average number of hours that freshmen study each week. The standard deviation from a previous study is 2.6 hours. How large a sample must be selected if he wants to be 99% confident of finding whether the true mean differs from the sample mean by 0.5 hour?

Q: After entering the test scores from her Statistics class of 25 students, the instructor calculated…

A: IQR is obtained as the difference between the third and first quartiles.

Q: a successful basketball player has a height of 6 feet 9 inches, or 206 cm. Based on statistics from…

A: Given,           Z -score=4.45           A basket ball player has a height of  6 feet 9…

Q: A population has mean 49 and standard deviation 5. What is the data value that has a z-score of 2?…

A:

Q: Dr. Samwell Tarly wants to estimate the number of books checked out of the library in the past year.…

A: It is given that the mean is 10,000 and the standard deviation is 10.

Q: Choose a quantitative variable.  Measure it on two different samples of 10, drawn from two different…

A:

Q: A successful basketball player has a height of 6 feet 2 ​inches, or 188 cm. Based on statistics from…

A: Given the Z score of height of basket ball player is 1.95. The original height of the basket ball…

Q: You have a dataset with a mean of 2, median of 3 and variance of 9.  What is the skewness?

A: Given that  Mean = 2 , Median = 3 , Variance = 9

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: Twenty-five percent of commercial airline accidents are caused by bad weather. If 300 commercial…

A: The mean of the binomial random variable obtained by the formula μ=np, where (n) is the number of…

Q: A history class has 95 members. If there is a 22% absentee rate per class meeting , find the mean…

A:

Q: A flu test shows that about 31% of 90 patients visited hospital in the first week of January had…

A: Given that  n = 90 , p = 31% = 0.31 , q = 1 - p = 1 - 0.31 = 0.69 X ~ Binomial (n = 90 , p = 0.31) X…

Q: s known that o = 2.15 pounds. %3D sample should be taken to be 93% confident that the sample mean is…

A: The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The allowable…

Q: A university dean wishes to estimate the average number of hours his part-time instructor teaches…

A:

Q: A survey of enrollment at 35 community colleges across the United States yielded the following…

A: Given: Let x be the enrollment at 35 community colleges across the United States. Sample size(n)=35…

Q: The mean height of a population of men is 70.8 inches and the standard deviation is 3.2 inches. What…

A:

Q: With the extra data value,  the range, standard deviation, and variance is?

A: Given data: 3.31 2.79 2.83 1.97 1.69 2.54 2.46 3.44 3.93 1.59 2.86 1.61 2.57 4.02 2.49 2.42…

Q: SHS Principal wishes to estimate the average number of hours that Grade 11 students study each week.…

A: Given that  Population standard deviation =2.6 Margin of error =E =0.5 99% confidence.

Q: A University Dean wants to estimate the average number of hours his part-time instructors teach per…

A:

Q: patient’s blood sugar readings were recorded during a recent stay in the hospital. The median shows…

A: Given that  Median = 97.3 Mode = 98.5 We know that  Empirical relation Mean = 3*Median - 2*Mode

Q: Find the mean and standard deviation of the original set of data.

A:

Q: A successful basketball player has a height of 6 feet 11 ​inches, or 211 cm. Based on statistics…

A:

Q: A researcher in Des Moines, Iowa sampled 56 households and found the mean number of puppies per…

A: # sample size n=56  population mean mu=3.03  standard deviations=1.5  then to find 62nd percentile…

Q: A successful basketball player has a height of 6 feet 3 ​inches, or 191 cm. Based on statistics from…

A: Given,a basketball player has a height of 6 feet 3 inchesand the Z-score =2.31

Q: A successful basketball player has a height of 6 feet 4 ​inches, or 193 cm. Based on statistics from…

A:

Q: Find the standard deviation for this data set. if a one goal hockey game was added to this data set,…

A: From the plot representing the number of goals scored per game, there are three games in which three…

Q: If the standard deviation of a sample is 4.3 for 28 data values, what would the standard deviation…

A: