1. What does a z- score of 3 for a data value x represent?

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: very observation in a data set is multiplied by a constant k. What best describes the effect on…

A: Given : Every observation in a data set is multiplied by a constant k Let the observations be :…

Q: he table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3…

A: The formula to find the mean is x=∑f·x∑f. Consider the following table. Test score (x) Frequency…

Q: Below is a list of the salaries for the starting lineup of the local pro baseball team. Pitcher:…

A: We have to find the mean, mode, median.

Q: 3. Classify the following examples of data as either true or false: b. Number of blue whales sighted…

A: A data, can be expressed in terms of numerical value.

Q: An economist compiled data on productivity improvements last year for a sample of firms producing…

A: Degree of freedom of groups=k-1 Degree of freedom of  error term=N-k

Q: What does a z-score tell you about a data value?

A: Solution: Let X be the random variable. The z-score is the standardized value of the given data.

Q: what is nominal (categorial) data?

A: Categorical data: The type of data that naturally take non-numerical values, such as words that can…

Q: When data is normally distributed the mean equals the mode. True

A: Normal distribution

Q: 4. Consider a data set of 1000 annual incomes (in thousand of dollars). Suppose two zeros were…

A: There are total 1000 annual incomes in a data set. Now, 2 zeros have been mistakenly added to one of…

Q: The starting point in a research project should be to determine the method to be used to collect the…

A: The following steps involved in a research project:Choose a TopicReview LiteratureFormulate…

Q: A food bank investigates if the number of times their donors walk by a homeless person each week…

A: The following information has been provided: Donor ZX ZY 1 -1.3 0.36 2 0.64…

Q: How do you find D? Asking about the end behavior of the data?

A: To find the model that exhibits the end behavior of the data, we need to look at the possible end…

Q: + 5 6 7 8 9 10 11 12 13 14 data Based on the boxplot above, what is the value for the Q3

A: The boxplot (box and whisker) plot is a simple graphical method used to display the five-number…

Q: (2) Look at the dotplot of the data below: 200 400 600 800 1000 1200 CHOL a. Estimate (don't…

A:

Q: What's the Z score and how is it calculated?

A: We know z-score is used in many fields. But we should know what is the meaning of z-score and how to…

Q: Education influences attitude and lifestyle. Differences in education are a big factor in the…

A: There are two independent samples which are 65 and older, 25-34. Both samples come from population…

Q: Assume the data are minutes too late to statistics class of five consecutive days. X  12 23 15…

A:

Q: ail ridership during the summer months in the North-East is believed to be closely related to the…

A: R square is the measure used to estimate the variation explained in the regression model. It is also…

Q: A food bank investigates if the number of times their donors walk by a homeless person each week…

A: Given that: # of homeless people seen each week Donation to food bank Donor ZX ZY…

Q: why do you think the data presented this way?

A: The 2 different factors considered are: Human Factors Land Use Ozone Aerosols Greenhouse…

Q: 5. The grade point average (GPA) for college students is based on a weighted mean computation. For…

A: 5. Given The grades are given the following data values (x): A(4), B(3), C(2), D(1) and F(0) Credits…

Q: What does it mean when a constant is added to every data value in a data set ?

A: when a constant is added to every data value in a data set, there will be a change in the…

Q: how did you find the Z score?

A: The critical value  of z for 97% confidence  interval  is 2.17.