The histogram shows the reviewer ratings on a scale from 1 (lowest) to 5 (highest) of a recently published book.

(a) Find the mean, variance, and standard deviation of the probability distribution.

(b) Interpret the results.

Reviewer Ratings 1 2 3 4 5 0.0 0.1 0.2 0.3 0.4 0.5

Rating Probability 0.020 0.097 0.213 0.236 0.434

d is correct

step-by-step explanation:

good job you smart son of a gun you are smarter that einstein. 7

-362

step-by-step explanation:

(12)(4)+2(12)-34(12)+2(12)-3

  \/         \/         \/         \/

  48 +   24 -   408 + 24 - 3

      \   /               \   /

          72     -     432 - 3 = -363

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5