6. Suppose a researcher used data on a group of third year students at MIT to estimate the following regression (standard errors are in the parenthesis), where termGPA is GPA for a term, and atndrte is percentage points of classes attended during the term termGPA= 0.625+0.024atndrte (0.115) (0.001) 1) If the sample mean atndrte is 82, what is the sample mean of termGPA? 2) If student A has atndrte= 84 and student B has atndrte= 68, what is the predicted difference in their termGPA? A's actual termGPA is 3.2, and B's termGPA is 2.7. Why the predicted difference is not the same as the actual difference? 3) If the sample standard deviation of atndrte is 18 and the sample standard deviation of termGPA is 0.74, what is the sample correlation between atndrte and termGPA?

Q: A sample with M = 85 and s = 12 is transformed into z-scores. After the transformation, what are the…

A: According to the sum, a sample with M = 85 and s = 12 is transformed into z-scores.M = sample mean=…

Q: Suppose a small paint manufacturing company has a daily production that is normally distributed with…

A: Solution: It is given that a small paint manufacturing company has a daily production that is…

Q: what percent of the data falls within 2 standard deviations of the mean?

A:

Q: What is the explained variance and unexplained variance. correlation coefficient, is .771…

A: Determine the value of explained variance.   The value of explained variance is determined below as…

Q: only part 4.

A: If the sample size increases from 8, then the standard deviation, σ decreases.

Q: A correlation coefficient is computed from a sample of data values selected from a population is…

A: Sampling error is based on sampling standard deviation and sample size

Q: To determine if a training program has improved the average performance of trainees data are…

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

Q: What is the Numerical Value of correlation coefficient?

A:

Q: The maximum weights​ (in kilograms) for which one repetition of a half squat can be performed and…

A: Without the data entry of the soccer player with a maximum weight of 180 kg and a jump height of 64…

Q: Assume that at the average age of a population of wild turtles is normally distributed with mean age…

A:

Q: In an exam for a statistics class, the class average is 68 with a standard deviation 4. If a student…

A: Given mean μ= 68, standard deviation σ= 4 Let X: score of the students = 75

Q: Listed in the data table are 1Q scores for a random sample of subjects with medium lead levels in…

A: Given : For high lead level  x̄2 = 89.731 s2 = 9.764 n2 = 11

Q: The number of hours 10 students spent studying for a test and their scores on that test are shown in…

A: Given observation and calculation for correlation is shown below Hours(x) Test score(y) x2…

Q: Mrs. Smith’s reading class can read an average of 190 words per minute with a standard deviation of…

A: X follows a Normal distribution with mean = 190 and S.D = 18 Then z=(x-mean)/SD = (x-190)/18…

Q: if the variance of the water temperature in a lake is 28°, then for how many days would a researcher…

A: It is given that margin of error (E) is 3 and the confidence level is 99%.

Q: Suppose your manager indicates that for a normally distributed data set you are analyzing, your…

A: Given that Data points z score is -0.5 to 0.5 We have to find  The percentage of data points fall…

Q: In a test of significance, you can conclude there is a statistically significant relationship when:

A: The provided information is as follows:The objective of the given question is to determine when…

Q: If the variance of the water temperature in a lake is 27° how many days should the researcher select…

A: Given data,σ2=27σ=5.196E=5Z-value at 95% confidence is Zc=1.96n=?

Q: Suppose that the distance of fly balls hit to the outfield is normally distributed with a mean of…

A: Let X denote the distance of fly balls hit to the outfield is normally distributed with a mean of…

Q: P(30 <x<60) = 0.6293 (Round to four decimal places as needed.) d Find the number of women in the…

A:

Q: what measure of variability is to be computed with a median

A: Median is the mid ( second quartile ) of whole data. Median is measure of central tendency.

Q: What percentage the male population is between 72 and 76 inches in height?

A: The height of men in country is normally distributed with mean of 6 feet and variance of 16 inches…