One sample with n = 4 scores has a mean of M = 12, and a second sample with n = 6 scores has a mean of M = 8. If the two samples are combined, what is the mean for the combined set of scores? 19.2 10 9.6 4.8

Q: One sample of scores has a mean of M = 45 and a sample size of n = 10 scores.  A second sample of…

A:

Q: tudent obtained the mean of 58 observations as 48. It was later found that one observation was…

A: Given data, n=58 The mean for 58 observations is 48 x=∑xn48=∑x58∑x=2784

Q: If median of a data is 8, it can be interpreted as: a. All the values are greater than 10 b. All the…

A: Median: Median is the Middle value of the data set. That is, median divides the data into two equal…

Q: A set of n = 6 scores has a mean of M = 10. Another set of scores has n = 4 and M = 20. If these two…

A: Given, First set has mean = 10 and n =6 Second set has mean = 20 and n =4

Q: A researcher has collected the following sample data: 3, 5, 12, 3, 2. The mean of the sample is 5.…

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Q: Mary scored a 25 when the mean is 23 with a SD of 1.5 Sarah scored a 7 when the mean is 6 with a SD…

A: Given Information: Mary's score is 25 Mean μ=23 Standard deviation σ=1.5   Sarah's score is 7 Mean…

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 sample of n = 8 scores has a mean of M = 10. After one score is removed from the sample, the mean…

A: The mean is given by: M = 1n∑i=1nxiwhere, n is the total number of observations & xi's are the…

Q: Baseball team A of n=7 scores has a mean = 8.  Baseball team B of n=3 scores has a mean = 12.  if…

A: From the provided information,

Q: find the mean if Z-score =14, st.Dev.=2.5, for a score of 8.5

A: Standard normal distribution:The standard normal distribution is a special case of normal…

Q: In a psychology class, 53 students have a mean score of 84.7 on a test. Then 24 more students take…

A: Given Information No of students n1 = 53 Mean score µ1 = 84.7 24 more students have taken the test…

Q: Suppose the mean of X is 6. What is the mean of Y if a = 0.66 and Y=aX?

A: From the provided information, Mean of X is 6 that is E (X) = 6 a = 0.66

Q: Name Lois Chris Meg Peter Brian Stewie Exam1 57 46 45 18 98 96 Exam2 70 42 58 99 90

A: Given that,the mean of exam 2 is  65.Exam 1 and Exam 2 scores are given:NameExam 1Exam…

Q: m has a mean score of 79 on the first three tests in class. What is the highest grade Tom can get if…

A: It's the same as if he had made exacly 65 on the first three tests. He will make the highest grade…

Q: f someone scored a 17 when the mean is 19 with a SD of 5, what would their score be if the mean were…

A: given data if some one scored 17   x1=17μ1=19σ1=5 we have to find the score =X2 be if the mean =μ2…

Q: An ectopic pregnancy is twice as likely to develop when the pregnant woman is smoker compared to…

A: Consider EP represents the event that the women have an ectopic pregnancy.Consider S represents the…

Q: If the mean of a data set is 22 and the SD is 5, what % of the values fall between 12 and 27? Give a…

A: given that  mean of a data set is 22

Q: The mean score of 7 students on a short test is 7 out of 10. If six of the seven students scored 9,…

A: The mean score of 7 students on a short test is 7 out of 10 . If six of the seven students scored…

Q: Scores on a test have a mean of 66 and a standard diviation of 9. Michelle has a score of 57.…

A: Given,          Mean μ=66          Standard deviationσ=9          Michelle has a score X=57

Q: Q2: The number of stories in the 10 tallest buildings for two different cities is listed below.…

A: For determining the more variability in the number of stories between the specified cities, the…

Q: Q3. Find the value of z which make the variance of the set of data following equal to 2.5? 9,8,6,…

A: Topic- variance

Q: coefficient of variation is 30%. Its mode Is 88. Find the mean and the median.

A: Here given, Pearson's coefficient of SKEWNESS = 0.4 Coefficient of variation  = 30% = 0.30 Mode = 88…

Q: a set of 50 data values has a mean of 15 and a A set of 50 data has a mean of 15 and a varience of…

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Q: ACT scores overall have a mean of 1017 and s = 207. If a college wants to admit only the top 30% of…

A: mean = 1017 s = 207 z-critical value at confidence interval 70%   = 0.5244

Q: A sample of n-4 scores has a mean of M-8. If one new score with a value of X - 3 is added to the…

A: Here we need to find the mean after adding the new value x=7 to the present sample.

Q: In a psychology class, 40 students have a mean score of 89.5 on a test. Then 24 more students take…

A: Given,n1=40 , x¯1=89.5n2=24 , x¯2=78.3

Q: Kara has five exam scores of 6363, 5959, 6767, 7575, and 7373 in her biology class. What score does…

A: