Variable N or 95% CI StDev SE Mean Mean BuyItNow 9 630.78 20.47 (615.04 646.52) 6.82 c. Interpret the 95 % confidence interval in context. d. Compared to the confidence interval (569, 599) for prices from auctions obtained in Example 6, is there evidence that the mean price is higher when purchased through Buy It Now? Explain. e. Excluding the observation of $675, the confidence in- terval equals (615, 636). Does this change your answer to part d? Time spent on e-mail When the GSS askedn = people in 2012, "About how many hours per week do you spend sending and answering e-mail?" (EMAILHR), the summary statistics were = 6.89 and s 13.05. TI output with these data (available on the book's website) is shown in the screen shot. 1050 8.36 af ct a. What is the margin of error at the 95% confidence level for the point estimate of the mean number of hours? b. Interpret the 95% confidence interval shown in context. c. The distribution of hours spent is right-skewed (e.g., the minimum of zero hours is only 0.5 standard de- viations below the mean, but the largest value of 168 hours has a z-score larger than 12). Is this a concern for the validity of the confidence interval? r n. m- NORMAL FIX3 AUTO REAL RADIAN CL a? TInterval (6.100.7.680) X-6.890 Sx-13.050 n=1050.000 12 Grandmas using e-mail For the question about e-mail in the previous exercise, the 14 females in the GSS ofage at 8.37

Q: 5. 8. 45°

A: Solve for value x

Q: 14. 10 19

A: 14 Consider the sine angle property is, sinx=perpendicularhypotenuse

Q: 58.6 - 9.27

A: Given that the expression is  58.6-9.27.

Q: 1o.e 4.60

A: trigonometry rule

Q: 2. 6. 1.

A:

Q: 11. 10 22

A:

Q: 11. 45

A: We have to find the value of x.  For this we can use the concept of similar triangle.

Q: 18. 32 13

A:

Q: 14.

A: I have used theorem for circle

Q: 14. 115"

A:

Q: 13. 15 45°

A: We have to find x and y

Q: %3D 6.

A: Please see the explanation below

Q: 46 60

A:

Q: 29 14

A: It's trigonometric question so I'm providing hand written solution for better understanding.

Q: 20. 5332

A: Take ln on both sides.

Q: Find the circumference of each circle. Leave your answer in terms of T.

A: The circumference of a circle with radius r is 2πr.

Q: 1.r -5 1.Г 2

A:

Q: 53 60

A:

Q: 60.91-2.856

A: We want to find the value  60.91-2.856=?

Q: 10. 6. 3.

A: we have to find the radius of circle from the given figure

Q: 7. 45

A:

Q: 4. 215 415

A:

Q: 8. 2 k=1 3k

A:

Q: 13. 34 18

A:

Q: Find the circumference of each circle. Leave your answer in terms of T.

A: From the image of the circle, we see that the radius=r=3.9 units

Q: 4. 15 33,

A:

Q: | = +x 6.

A:

Q: 2.73-0.94

A: Here we subtract a number in another number.

Q: 50.19

A:

Q: 12. 30 y

A:

Q: 3 19.21 11 11

A:

Q: 1. 12

A: We can use the concept of Pythagoras theorem to solve the given problem.

Q: 248.96/3.20

A: we want to solve out the following 248.96/3.20let N = 248.96/3.20

Compound Probability

Compound probability can be defined as the probability of the two events which are independent. It can be defined as the multiplication of the probability of two events that are not dependent. 

Tree diagram

Probability theory is a branch of mathematics that deals with the subject of probability. Although there are many different concepts of probability, probability theory expresses the definition mathematically through a series of axioms. Usually, these axioms express probability in terms of a probability space, which assigns a measure with values ranging from 0 to 1 to a set of outcomes known as the sample space. An event is a subset of these outcomes that is described. 

Conditional Probability

By definition, the term probability is expressed as a part of mathematics where the chance of an event that may either occur or not is evaluated and expressed in numerical terms. The range of the value within which probability can be expressed is between 0 and 1. The higher the chance of an event occurring, the closer is its value to be 1. If the probability of an event is 1, it means that the event will happen under all considered circumstances. Similarly, if the probability is exactly 0, then no matter the situation, the event will never occur.