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IgorLugansk [536]
1 year ago
7

The manager of a grocery store selected a random sample of 100 customers to estimate the average checkout time. The 90% confiden

ce interval estimate for the average checkout time at the score is[1, 5] minutes. The correct confidence interval interpretation is ___________.
a. 100.0 to 200.0
b. If random samples of 100 customers are repeatedly selected, then that the average checkout time will be between 1 and 5 minutes for 95% of the samples.
c. We estimate with 95% confidence that the average checkout time for the sample of 100 customers is between 1 and 5 minutes.
d. None of these alternatives is correct.
e. We estimate with 95% probability that the average checkout time at the store is between 1 and 5 minutes.
Mathematics
1 answer:
lina2011 [118]1 year ago
3 0

Answer:

c

Step-by-step explanation:

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For which function does f decrease by 15% every time x increases by 1
LenaWriter [7]

Answer:

f(x) = 0.85^{x}

Step-by-step explanation:

The exponential function that decrease by 15% every time x increases by 1 is given by:

f(x) =  {(1 - 0.15)}^{x}

We simplify the parenthesis to get:

f(x) = 0.85^{x}

Therefore the decrease by 15% every time x increases by 1 is

f(x) =  {0.85}^{x}

The second choice is correct.

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1 year ago
While her husband spent 2½ hours picking out new speakers, a statistician decided to determine whether the percent of men who en
sveticcg [70]

Answer:

Men can be concluded to enjoy shopping electronic activity more than women, but in weekend days. The case might not hold true for week working days also.

Step-by-step explanation:

To study :  whether the percent of men who enjoy shopping for electronic equipment is higher than the percent of women who enjoy that.

  • Out of 67 men, 24 said they enjoyed the activity

So, % of men enjoying the activity  = (24 / 67) x 100

= 35.82%

Out of 24 women, 8 said that they enjoyed the activity

So, % of women enjoying the activity = (8 / 24) x 100

= 33.33%

4 0
2 years ago
When designing the jumps of a BMX racetrack, the jumps involve a launch ramp and a landing ramp. What are some facts about the p
zaharov [31]

The second third and last one


5 0
2 years ago
Read 2 more answers
A local fraternity is conducting a raffle where 55 tickets are to be sold—one per customer. There are three prizes to be awarded
harkovskaia [24]

Answer:

(a) 0.0152%

(b) 1.1663%

(c) 19.4297%

(d) 79.3787%

Step-by-step explanation:

Tickets bought by organizers = 4

Number of tickets = 55

Prizes = 3

(a) The probability that the four organizers win all of the prizes is:

P = \frac{4}{55}*\frac{3}{54}*\frac{2}{53}\\P=0.0152\%

(b) The probability that the four organizers win exactly two of the prizes is:

P = \frac{4}{55}*\frac{3}{54}*\frac{51}{53}+\frac{4}{55}*\frac{51}{54}*\frac{3}{53}+\frac{51}{55}*\frac{4}{54}*\frac{3}{53}\\P=1.1663\%

(c) The probability that the four organizers win exactly one of the prizes is:

P = \frac{4}{55}*\frac{51}{54}*\frac{50}{53}+\frac{51}{55}*\frac{4}{54}*\frac{50}{53}+\frac{51}{55}*\frac{50}{54}*\frac{4}{53}\\P=19.4397\%

(d) The probability that the four organizers win none of the prizes is:

P = \frac{51}{55}*\frac{50}{54}*\frac{49}{53}}\\P=79.3787\%

5 0
2 years ago
This isosceles triangle has two sides of equal length, a, that are longer than the length of the base, b. The perimeter of the t
LuckyWell [14K]
Isosollese triangle has 2 equal sides that are longer than legnth of base
perimiter=15.7
equation is 2a+b=15.7
so if the longer side is 6.3, wat is legnth of base
we know that identical sides are bigger so 6.3 is one of the identical sides
2a means the 2 idneical sides
2(6.3)+b=15.7
12.6+b=15.7
subtract 12.6 from btohs ides
b=3.1
answer is base=3.1 cm
8 0
1 year ago
Read 2 more answers
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