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WorksheetsUnit 4b Quizziz Review
Total questions: 19
Worksheet time: 17mins
Which of the following would be considered discrete random variables?
The time it takes to run a race
The number of grains of sand at the beach
The number of students who like math
Shoe sizes
The weights of students at Midlo
Of the two tables below, which can be considered a probability distribution?
The number of sweatshirts a vendor sells daily has the following probability distribution.
What is the missing value in the distribution?
(a)
The number of sweatshirts a vendor sells daily has the following probability distribution.
What is the probability that the vendor sells 3 sweatshirts at most, on any randomly-selected day?
(a)
The number of sweatshirts a vendor sells daily has the following probability distribution.
What is the expected value? Do NOT round your answer.
(a)
The number of sweatshirts a vendor sells daily has the following probability distribution.
As you saw in the last problem, the expected value is 1.52. What is the meaning of the expected value in the context of the problem?
Each day, the vendor will sell 1.52 sweatshirts.
The vendor will sell an average of 1.52 sweatshirts in the long run.
The vendor should sell at least 1.52 sweatshirts per day.
Each customer will buy 1.52 sweatshirts.
The number of sweatshirts a vendor sells daily has the following probability distribution.
As you saw in the last two problems, the expected value is 1.52. How many sweatshirts should the vendor expect to sell in 100 days?
(a)
The number of sweatshirts a vendor sells daily has the following probability distribution.
What is the variance? Round to the nearest hundredth.
(a)
The number of sweatshirts a vendor sells daily has the following probability distribution.
What is the standard deviation? Round to the nearest hundredth.
(a)
An insurance policy costs $200 and will pay policyholders $10,000 if they suffer a major injury (resulting in hospitalization) or $3000 if they suffer a minor injury (resulting in lost time from work). The company estimates that each year 1 in every 5000 policyholders may have a major injury while 1 in 200 have a minor injury.
If X is how much money a customer receives from the company, what is the expected value?
(a)
Based on the expected value from the previous problem, will the company stay in business?
Yes
No
Couples dining at the restaurant, The Quiet Nook, can expect “Lucky Lovers” discounts averaging $5.38 with a standard deviation of $8.62. Suppose for several weeks the restaurant has been giving out $5 off any one meal to each table.
If every couple uses their $5 off coupon, what will be the new average discount?
(a)
Couples dining at the restaurant, The Quiet Nook, can expect “Lucky Lovers” discounts averaging $5.38 with a standard deviation of $8.62. Suppose for several weeks the restaurant has been giving out $5 off any one meal to each table.
As seen in the previous problem...If every couple uses their $5 off coupon, what will be the new standard deviation of discounts?
(a)
Couples dining at the restaurant, The Quiet Nook, can expect “Lucky Lovers” discounts averaging $5.38 with a standard deviation of $8.62. When couples get the "Lover's Special", the restaurant offers double the discount.
What will be the new average discount for couples who get the Lover's Special?
(a)
Couples dining at the restaurant, The Quiet Nook, can expect “Lucky Lovers” discounts averaging $5.38 with a standard deviation of $8.62. As seen in the previous problem...When couples get the "Lover's Special", the restaurant offers double the discount.
What will be the new standard deviation?
(a)
Couples dining at the restaurant, The Quiet Nook, can expect “Lucky Lovers” discounts averaging $5.38 with a standard deviation of $8.62. When couples get the "Lover's Special", the restaurant offers double the discount. At the same time, they are offering the $5 off any one meal per table.
What will be the new average savings a couple will make at The Quiet Nook?
(a)
Couples dining at the restaurant, The Quiet Nook, can expect “Lucky Lovers” discounts averaging $5.38 with a standard deviation of $8.62. As seen in the previous problem...When couples get the "Lover's Special", the restaurant offers double the discount. At the same time, they are offering the $5 off any one meal per table.
What will be the new standard deviation of savings a couple will make at The Quiet Nook?
(a)
Couples dining at the restaurant, The Quiet Nook, can expect “Lucky Lovers” discounts averaging $5.38 with a standard deviation of $8.62.
If two couples were dining together but had separate checks, how much did they save on average overall?
(a)
Couples dining at the restaurant, The Quiet Nook, can expect “Lucky Lovers” discounts averaging $5.38 with a standard deviation of $8.62.
What is the standard deviation of the combined savings for the two couples from the previous problem? Round to the nearest hundredth.
(a)
