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2 years ago

A tire shop starts off with the same number of tires every month. In January,

Mathematics

1 answer:

7nadin3 [17]2 years ago

4 0

Answer:

the answer is B

Step-by-step explanation:

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Can someone help please!!

saveliy_v [14]

Answer: ummm what

Step-by-step explanation:

4 0

2 years ago

You apply for a job and have to take a drug test. You are curious about the error rate for the test so you do some research. You

Ber [7]

Answer:

Test statistic Z = -1.0

|Z| = |-1.0| < 1.96 at 0.05 level of significance.

The null hypothesis is accepted

The company that produces the drug test claims that less than 14% of the test results are wrong

Step-by-step explanation:

Step(i):-

Given that the population proportion P = 14% =0.14

Given that the sample size 'n' = 382 tests

Given that find a study where 47 out of 382 test results using this test were wrong (either a false positive or a false negative).

Sample proportion

$p = \frac{x}{n} = \frac{47}{382} = 0.1230$

Null hypothesis: H₀ : P = 0.14

Alternative Hypothesis:H₁ : P≠ 0.14

Step(ii):-

Test statistic

$Z = \frac{p-P}{\sqrt{\frac{PQ}{n} } }$

$Z = \frac{0.1230-0.14}{\sqrt{\frac{0.14 X0.86}{382} } }$

Z = - 1.0

|Z| = |-1.0| < 1.96 at 0.05 level of significance.

Final answer:-

The null hypothesis is accepted

The company that produces the drug test claims that less than 14% of the test results are wrong

4 0

3 years ago

What is u? -u+300=200

vodomira [7]

Answer:

100

Step-by-step explanation:

200-300= -100 But the negative of a negative is a positive so the answer is: 100.

4 0

2 years ago

Read 2 more answers

Two gamblers, call them Gambler A and Gambler B flip a coin repeatedly. The coin is unfair and comes up heads 2/3 of the time. G

Andru [333]

Answer:

≈ 0.52

Step-by-step explanation:

P( head ) = 2/3 , P( tail ) = 1/3

when a head is tossed ; Gambler A wins $1

when a tail is tossed : Gambler B wins $1

Determine the P( Gambler A wins the game ) if he starts with I dollars

Assuming I = $1

n = 5

p ( head ) = P( winning ) = 0.66

p( losing ) = 0.33

applying the conditional probability in Markov which is ;

Pₓ = pPₓ₊₁ + (1 - p) Pₓ₋₁

P( 1) = 0.66P₂ + 0.33P₀

resolving the above using with Markov probability

P( 1 ) = 0.51613

hence the probability of Gambler A winning the game if he starts with $1

≈ 0.52

6 0

3 years ago

Simplify the expression 8h +(-7.7d) - 13+5d - 3.1h.

Anna007 [38]

Answer:

4.9h−2.7d−13

Step-by-step explanation:

8 0

3 years ago