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professor190 [17]
3 years ago
10

HELP PLEASE A car dealership has 64 vehicles on its lot.

Mathematics
2 answers:
nydimaria [60]3 years ago
4 0
To find this answer, you can make the whole number, 64, a fraction.
64/1 divided by 1/4.
This would give you 256.
Zielflug [23.3K]3 years ago
3 0

Answer:

Pickup trucks 1/4 = 25%

25% of 64 cars = 16 Pickup trucks

Leaving us with 48 cars left.

"twice as many cars as there are SUVs."

32 = cars

16 = SUVs

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There is not enough evidence to support the claim that the liquid diet yields a higher mean weight loss than the powder diet (P-value = 0.15).

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This is a hypothesis test for the difference between populations means.

The claim is that the liquid diet yields a higher mean weight loss than the powder diet.

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H_0: \mu_1-\mu_2=0\\\\H_a:\mu_1-\mu_2< 0

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The sample 1 (powder diet group), of size n1=49 has a mean of 42 and a standard deviation of 12.

The sample 2 (liquid diet group), of size n2=36 has a mean of 45 and a standard deviation of 14.

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M_d=M_1-M_2=42-45=-3

The estimated standard error of the difference between means is computed using the formula:

s_{M_d}=\sqrt{\dfrac{\sigma_1^2}{n_1}+\dfrac{\sigma_2^2}{n_2}}=\sqrt{\dfrac{12^2}{49}+\dfrac{14^2}{36}}\\\\\\s_{M_d}=\sqrt{2.939+5.444}=\sqrt{8.383}=2.895

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t=\dfrac{M_d-(\mu_1-\mu_2)}{s_{M_d}}=\dfrac{-3-0}{2.895}=\dfrac{-3}{2.895}=-1.04

The degrees of freedom for this test are:

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\text{P-value}=P(t

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The null hypothesis failed to be rejected.

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