Question

Suppose the coffee industry claimed that the average adult drinks 1.7 cups of coffee per day. To test this claim, a random sample of 50 adults was selected, and their average coffee consumption was found to be 1.9 cups per day. Assume the standard deviation of daily coffee consumption per day is 0.5 cups. Using alpha=0.01, complete parts a and b below.

a. Is the coffee industry's claim supported by this sample?

Determine the null and alternative hypotheses.

The z-test statistic is

_______

(Round to two decimal places as needed.)

The critical z-score(s) is(are)

______

(Round to two decimal places as needed. Use a comma to separate answers as needed.)

Because the test statistic,_______(pick one below)

does not fall within the critical values,

is greater than the critical value,

falls within the critical values,

is less than the critical value,

_____________(pick one below)

do not reject

reject

the null hypothesis.

b. Determine the p-value for this test.

The p-value is_______

(Round to three decimal places as needed.)

Answer #1

5. Suppose the coffee industry claimed that the
average adult drinks 1.7 cups of coffee per day.
To test this claim, a random sample of
10 Coffee drinkers were selected
and their average coffee consumption was found to
be 2.0 cups per day.
Assume the standard deviation of daily coffee
consumption per day is 0.5 cups.
Using α = 0.20 test the Hypothesis Is the Coffee
consumption differs from the average coffee consumption?
a. State the Null Hypothesis and
alternate Hypothesis.
b. use...

Suppose the coffee industry claimed that the average adult
drinks 1.7 cups of coffee per day. To test this claim, a random
sample of 40 adults was selected, and their average coffee
consumption was found to be 1.9 cups per day. Assume the standard
deviation of daily coffee consumption per day is 0.6 cups. Using
alpha equals 0.01, determine the p-value for this test.

A researcher is testing the claim that the average adult
consumes 1.7 cups of coffee per day. Assume the population standard
deviation is 0.5 cups per day. A sample of 25 adults averaged 1.85
cups of coffee per day. Test the researcher’s claim at the 5%
significance level.

Previous research suggests that the average adult drinks 4 cups
of coffee per day. To test this, 10 adults were randomly sampled
from a normal distribution. Data is below.
5.0 7.0 2.0 8.0 4.0 3.0 6.5 5.0 4.5 8.0
Using a t-test, test whether the average number of cups of
coffee is equal to 4 at the 5% significance level.
i need ans in R programming

A coffee manufacturer is interested in whether the mean daily
consumption of regular-coffee drinkers is less than that of
decaffeinated-coffee drinkers. Assume the population standard
deviation for those drinking regular coffee is 1.35 cups per day
and 1.49 cups per day for those drinking decaffeinated coffee. A
random sample of 49 regular-coffee drinkers showed a mean of 4.20
cups per day. A sample of 45 decaffeinated-coffee drinkers showed a
mean of 5.10 cups per day.
Use the 0.050 significance level....

Consider the hypotheses shown below. Given that x=41, σ=11,
n=32, α=0.05, complete parts a and b.
H0:μ ≤ 38
H1: μ > 38
a. What conclusion should be drawn?
b. Determine the p-value for this test.
a. The z-test statistic is What? . (Round to two decimal
places as needed.)
The critical z-score(s) is(are) What? . (Round to two decimal
places as needed. Use a comma to separate answers as needed.)
Because the test statistic ▼ (is greater than the...

Suppose a university advertises that its average class size is
32 or less. A student organization is concerned that budget cuts
have led to increased class sizes and would like to test this
claim. A random sample of 39 classes was selected, and the average
class size was found to be 34.7 students. Assume that the standard
deviation for class size at the college is 7 students. Using
α=0.01, complete parts a and b below.
a. Does the student organization...

A record of Starbucks coffee shop at school shows that the mean
number of cups of coffee consumed by a science-major student is 6
per week. A student in Sats feels it is greated. She found that the
average number of coffee cups had was 9 with a standard deviation
of 2 cups for randomly selected 10 science-major students in a
week. Assuming that the weekly consumption of coffee by
science-major students is normally distributed, test her claim at
5%...

A sporting goods store believes the average age of its customers
is 36 or less. A random sample of 38 customers was surveyed, and
the average customer age was found to be 38.9 years. Assume the
standard deviation for customer age is 9.0 years. Using α=0.01,
complete parts a and b below.
a. Does the sample provide enough evidence to refute the age
claim made by the sporting goods store?
Determine the null and alternative hypotheses.
H0: μ ▼ less...

I believe that the average coffee drinker, drinks less than 8
cups of coffee in a 2 week period. I spoke to 50 coffee drinking
co-workers and they drank between 7,10,14,3,5,10,2,14,10,12,0, 2,
10, 14, 8, 10, 13, 12,0,10,
12,14,5,6,7,8,10,13,12,2,5,7,8,9,12,14,1,3,7,9,2,14,13,12,2,7,8,9,6,1.
Test the hypothesis that true mean number of cups of coffee
consumed in a 2-week period for coffee drinkers is less than 8 cups
per day at the 0.025 level of significance. The null H0:
μ = 8 and alternate HA:...

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