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alexgriva [62]
3 years ago
10

twins Denise and Deandre always flip a coin to describe who gets to ride in the front seat to school. during a 6-week period (30

school days), how many times does Denise likely get the front seat ?
Mathematics
1 answer:
Yanka [14]3 years ago
4 0
15 because it is a 50/50 chance each coin flip meaning you spilt 30 in half making it 30
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EIGHTEEN SONGS AT A DOLLAR EACH. SEVEN VIDEOS AT SIX BUCKS EACH IS FORTY-TWO DOLLARS. together they equal $60


6 0
3 years ago
Read 2 more answers
1. In order to get more female customers, a new clothing store offers free gourmet coffee and pastry to its customers. The avera
ioda

Answer:

No, the manager is not correct based on the 95% confidence interval.

Step-by-step explanation:

We are given that the average daily revenue over the past five-week period has been $1,080 with a standard deviation of $260, i.e.; X bar = $1080 and s = $260 and sample size, n = 35 .

The Pivotal quantity for 95% confidence interval is given by;

                \frac{Xbar - \mu}{\frac{s}{\sqrt{n} } } ~ t_n_-_1

where, X bar = sample mean = $1080

                s  = sample standard deviation = $260

                 n = sample size = 35 {five-week}

So, 95% confidence interval for average daily revenue, \mu is given by;

P(-2.032 < t_3_4 < 2.032) = 0.95

P(-2.032 < \frac{Xbar - \mu}{\frac{s}{\sqrt{n} } } < 2.032) = 0.95

P(-2.032 * {\frac{s}{\sqrt{n} } < {Xbar - \mu} < 2.032 * {\frac{s}{\sqrt{n} } ) = 0.95

P(X bar - 2.032 * {\frac{s}{\sqrt{n} } < \mu < X bar + 2.032 * {\frac{s}{\sqrt{n} } ) = 0.95

95% confidence interval for \mu = [ X bar - 2.032 * {\frac{s}{\sqrt{n} } , X bar + 2.032 * {\frac{s}{\sqrt{n} } ]

                                            = [ 1080 - 2.032 * {\frac{260}{\sqrt{35} } , 1080 + 2.032 * {\frac{260}{\sqrt{35} } ]

                                             = [ 990.70 , 1169.30 ]

<em>No, the manager is not correct based on the fact that the coffee and pastry strategy would lead to an average daily revenue of $1,200 because the calculate 95% confidence interval does not include value of $1200.</em>

Therefore, the store manager believe is not correct.

8 0
3 years ago
Please help me!<br><br> Show me how you found the answers.<br><br> 3 ANSWERS NEEDED
boyakko [2]

Answer:

B,C,E

Step-by-step explanation:

Multiple each sales total by .1 and then add 150. If they equal then it works, if they don't then it doesn't. No other way I can think of to explain this.

7 0
3 years ago
Need some help still with these 3 questions
disa [49]

Answer:

first : x²-10x=39

{-3;13}

second : multiply both sides by 1\4

last is : {-1;5}

7 0
2 years ago
The student council sold 286 roles of wrapping paper for a fundraiser. If they raised $3,146, what was they cost of one role of
zhenek [66]
3146 / 286 = 11....so the cost of 1 roll is $ 11
8 0
3 years ago
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