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IceJOKER [234]
3 years ago
15

A staff member at UF's Wellness Center is interested in seeing if a new stress reduction program will lower employees high blood

pressure levels. Twenty people are selected and have their blood pressure measured. Each person then participates in the stress reduction program. One month after the stress reduction program, the blood pressure levels of the employees were measured again. Did the program reduce the average blood pressure level? The 95% confidence interval was (5.6, 10.2). What can we expect will be the p-value for a two sided test using this data? Group of answer choices The p-value should be smaller than 0.95 The p-value should be larger than 0.95 The p-value should be smaller than 0.05. The p-value should be higher than 0.05.
Mathematics
1 answer:
Oksi-84 [34.3K]3 years ago
4 0

Answer:

The p-value should be smaller than 0.05.

Step-by-step explanation:

We know that the 95% confidence interval for the difference of means is (5.6, 10.2). As the lower bound is larger than 0, we are 95% confident that the reduction program had had a effect in the blood pressure level.

Then, as the program had a significant effect in the blood pressure level, we know that the null hypothesis (that states that the blood pressure levels would no change significantly) is then rejected.

If the significance level is 0.05, according to the confidence of the interval, to reject the null hypothesis, the p-value had to be lower than the significance level. In conclusion, the p-value should be lower than 0.05.

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A sporting goods manager was selling a ski set for a certain price. The manager offered the markdowns shown on the right, making
ra1l [238]

Answer:

The original selling price would be $ 515.87 ( approx )

Step-by-step explanation:

Consider the complete question is :

"A sporting goods store manager was selling a ski set for a certain price. The manager offered the markdowns​ shown, making the​ one-day sale price of the ski set ​$325. Find the original selling price of the ski set. It was marked down 10% and 30%"

Suppose x be the original selling price ( in dollars ),

After marking down 10%,

New selling price = x - 10% of x = x - 0.1x = 0.9x

Again after marking down 30%,

Final selling price = 0.9x - 30% of 0.9x

= 0.9x - 0.3 × 0.9x

= 0.9x - 0.27x

= 0.63x

According to the question,

0.63x = 325

\implies x =\frac{325}{0.63}=\$ 515.87

Therefore, the original selling price would be $ 515.87.

8 0
3 years ago
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slamgirl [31]
13. A=(-1,3) 14.m= (-4,1)
8 0
3 years ago
PLEASE HELP!!! How much blueberry pie will each person get if 4 people share one half of the pie equally?
Rasek [7]

Answer:

Each person gets one eighth of the pie.

Step-by-step explanation:

1/2 pie divided by 4.

1/2 / 4 = 1/2 / 4/1 = 1/2 × 1/4 = 1/8

Answer: Each person gets one eighth of the pie.

8 0
2 years ago
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A potato sorting machine produces 5 pounds of potatoes an average for the standard aviation is a half a pound assuming the weigh
mixas84 [53]
For a 95% confidence interval, the corresponding z-score is 1.96. Therefore the deviation will by 1.96*0.5 lbs = 0.98 lbs. Therefore, the confidence interval will be (5 - 0.98, 5 + 0.98), which is (4.02, 5.98). The weight range is from 4.02 lbs to 5.98 lbs.
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3 years ago
754,863 rounded to the nearest ten thousands place
12345 [234]
754,863 rounded to the nearest ten thousands is 750,000
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3 years ago
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