Question

The amount of water consumed each day by a healthy adult follows a normal distribution with a mean of 1.20 liters. A health campaign promotes the consumption of at least 2.0 liters per day. A sample of 10 adults after the campaign shows the following consumption in liters:

1.34 | 1.32 | 1.38 | 1.40 | 1.70 | 1.40 | 1.32 | 1.90 | 1.38 | 1.36 |

At the 0.100 significance level, can we conclude that water
consumption has increased? Calculate and interpret the
*p*-value.

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- State the null hypothesis and the alternate hypothesis.
**(Round your answers to 2 decimal places.)**

- State the decision rule for 0.100 significance level.
**(Round your answer to 3 decimal places.)**

- Compute the value of the test statistic.
**(Round your intermediate and final answer to 3 decimal places.)**

- At the 0.100 level, can we conclude that water consumption has increased?

- Estimate the
*p*-value.

Answer #1

The amount of water consumed each day by a healthy adult follows
a normal distribution with a mean of 1.44 liters. A health campaign
promotes the consumption of at least 2.0 liters per day. A sample
of 10 adults after the campaign shows the following consumption in
liters:
1.80
1.94
1.70
1.50
1.64
1.40
1.64
1.70
1.66
1.54
At the 0.100 significance level, can we conclude that water
consumption has increased? Calculate and interpret the
p-value.
State the null hypothesis...

The amount of water consumed each day by a healthy adult follows
a normal distribution with a mean of 1.28 liters. A sample of 10
adults after the campaign shows the following consumption in
liters. A health campaign promotes the consumption of at least 2.0
liters per day:
1.90 1.62 1.78
1.30 1.68 1.46 1.46
1.66 1.32 1.52
At the 0.100 significance level, can we conclude that water
consumption has increased? Calculate and interpret the
p-value.
a.
State the null...

5) The amount of water consumed each day by a healthy adult
follows a normal distribution with a mean of 1.56 liters. a health
campaign promotes the consumption of at least 2.0 liters per day. A
sample of 10 adults after the campaign shows the following
consumption in liters:
1.88 1.74 1.98 1.70 1.86 1.72 1.74 1.98 1.68 1.50
At the 0.025 significance level, can we conclude that water
consumption has increased? Interpret the p-value.
a) State the null hypothesis...

The amount of water consumed each day by a healthy adult follows
a normal distribution with a mean of 1.28 liters. A sample of 10
adults after the campaign shows the following consumption in
liters:
1.90 1.62 1.78
1.30 1.68 1.46 1.46
1.66 1.32 1.52
At the .10 significance level, can we conclude that water
consumption has increased? Calculate and interpret the p-value.
(a)
State the null hypothesis and the alternate hypothesis.
(Round your answers to 2 decimal places.)
H0:...

The amount of Alcohol consumed each day by unhealthy officers
working for the Minnesota Police force follows a normal
distribution with a mean of 1.54 liters. An unhealthy guidline
promotes the consumption of at least 2.0 liters of alcohol per day.
A sample of 10 police officers in Minnesota after following the
unhealthy guideline shows the following alcohol consumption in
liters:
1.35
1.68
1.76
2.00
1.84
1.84
1.50
1.82
1.86
1.60
At the 0.050 significance level, can we conclude that...

The mean income per person in the United States is $38,000, and
the distribution of incomes follows a normal distribution. A random
sample of 13 residents of Wilmington, Delaware, had a mean of
$48,000 with a standard deviation of $9,200. At the 0.100 level of
significance, is that enough evidence to conclude that residents of
Wilmington, Delaware, have more income than the national
average?
State the null hypothesis and the alternate hypothesis.
State the decision rule for 0.100 significance level....

The mean income per person in the United States is $45,000, and
the distribution of incomes follows a normal distribution. A random
sample of 17 residents of Wilmington, Delaware, had a mean of
$55,000 with a standard deviation of $8,500. At the 0.100 level of
significance, is that enough evidence to conclude that residents of
Wilmington, Delaware, have more income than the national
average?
State the null hypothesis and the alternate hypothesis.
State the decision rule for 0.100 significance level....

A laboratory claims that the mean sodium level, ? , of a healthy
adult is 141 mEq per liter of blood. To test this claim, a random
sample of 90 adult patients is evaluated. The mean sodium level for
the sample is 140 mEq per liter of blood. It is known that the
population standard deviation of adult sodium levels is 14 mEq. Can
we conclude, at the 0.05 level of significance, that the population
mean adult sodium level differs...

The mean consumption of water per household in a city was 1248
cubic feet per month. Due to a water shortage because of a drought,
the city council campaigned for water use conservation by
households. A few months after the campaign was started, the mean
consumption of water for a sample of 99 households was found to be
1181 cubic feet per month. The population standard deviation is
given to be 221 cubic feet. a. Find the p-value for the...

Exercise 10-6 (LO10-4) The waiting time for customers at
MacBurger Restaurants follows a normal distribution with a
population standard deviation of 1 minute. At the Warren Road
MacBurger, the quality-assurance department sampled 50 customers
and found that the mean waiting time was 2.75 minutes. At the 0.05
significance level, can we conclude that the mean waiting time is
less than 3 minutes? State the null hypothesis and the alternate
hypothesis. State whether the decision rule is true or false:
Reject...

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