Question
In: Statistics and Probability
Suppose the first population is all face-to-face meetings held in March 2020, the second population is...
Suppose the first population is all face-to-face meetings held in March 2020, the second population is all Zoom meetings held in March 2020, and the parameter of interest is μ1 – μ2 = the difference in the mean length of all face-to-face meetings and the mean length of all Zoom meetings. The meeting lengths are measured in minutes. For both face-to-face meetings and Zoom meetings the distributions of meeting times are skewed heavily to the right due to some meetings that are very long.
(a). Of interest is to test the hypothesis that the mean length of all face-to-face meetings and the mean length of all Zoom meetings are the same, versus the alternative hypothesis that the mean length of all face-to-face meetings is less than the mean length of all Zoom meetings. State the appropriate null and alternative hypotheses that should be tested.
(b). A simple random sample of 83 face-to-face meetings held in March 2020 was selected, and the mean length of this sample of 83 meetings was 46 minutes with a standard deviation of 13.6 minutes. An independent simple random sample of 81 Zoom meetings held in March 2020 was selected, and the mean length of this sample of 81 meetings was 51 minutes with a standard deviation of 11.6 minutes. If appropriate, use this information to test the hypotheses stated in part (a) at the a = .10 level of significance.
Solutions
orchestra answered 2 years agoRelated Solutions
Suppose the first population is all face-to-face meetings held in March 2020, the second population is...
Suppose the first population is all face-to-face meetings held
in March 2020, the second population is all Zoom meetings held in
March 2020, and the parameter of interest is μ1 –
μ2 = the difference in the mean length of all
face-to-face meetings and the mean length of all Zoom meetings. The
meeting lengths are measured in minutes. For both
face-to-face meetings and Zoom meetings the distributions of
meeting times are skewed heavily to the right due to some meetings...
Suppose the first population is all Zoom meetings held in March 2020, the second population is...
Suppose the first population is all Zoom meetings held in March
2020, the second population is all face-to-face meetings held in
March 2020, and the parameter of interest is μ1 – μ2 = the
difference in the mean number of people attending all Zoom meetings
and the mean number of people attending all face-to-face meetings.
For both Zoom meetings and face-to-face meetings the distributions
are skewed heavily to the right due to some meetings that have many
people in attendance....
Commas Quiz1. The first, and second, meetings reviewedprocesses, deliveries, and safety.Select one:a....
Commas Quiz1. The first, and second, meetings reviewed
processes, deliveries, and safety.Select one:a. This sentence is punctuated correctly.b. This sentence contains at least one comma error.2. Although we were supposed to meet on Monday,
our client needed to reschedule.Select one:a. This sentence is punctuated correctly.b. This sentence contains at least one comma error.3. The engineers explained, how design,
manufacturing, packaging, and materials all contributed to
cost.Select one:a. This sentence is punctuated correctly.b. This sentence contains at least one comma error.4....
. In the first week of March 2020, both the Federal Reserve (the Fed) and the...
. In the first week of March 2020, both the
Federal Reserve (the Fed) and the Bank of Canada (BOC) decreased
their policy interest rates by 0.5 percentage points. Clearly, both
are trying to decrease interest rates in the money market (and
throughout the economy).
(a) Should the BOC
engineer an increase or a decrease the money supply to support its
efforts to achieve lower interest rates in the money market? [Hint:
Include a diagram of the money market with...
The following is the Treasury bond quote as of March 25th, 2020. Assume the face (par)...
The following is the Treasury bond quote as of March 25th, 2020.
Assume the face (par) value of the Treasury bond is $100,000 and
the bond pays interest semiannually.
Coupon Maturity Ask
Rate Date Bid Asked Chg Yld
(YTM)
2.8% March
25th,
2033 ? ? -
.112 2.65%
Is this a premium bond or a discount bond? What is the asked
price of the Treasury bond in dollars? What is the asked price as a
% of the par value? What is its effective YTM? What is its current
yield? What was...
Suppose that assets of the First Bank consist of reserves held in cash and it has...
Suppose that assets
of the First Bank consist of reserves held in cash and it has
enough to meet the reserve requirement; long term loans the First
Bank made in the past were to reliable borrowers and should
eventually be repaid in the future, and low risk long-term U.S.
Government bonds. Is it correct to say that since the First Bank
has invested its assets wisely, the bank will be fine if there is a
run on all banks and...
Returns. Suppose you purchased Elevated Health Management’s stock on March 16, 2016 and held it for...
Returns. Suppose you purchased Elevated Health
Management’s stock on March 16, 2016 and held it for one year,
selling on March 15, 2017. Below are the cash flows from holding
HMA stock for each period.
Date
Price
Dividend
16−Mar−16
21.15
10−May−16
20.70
0.06
9−Aug−16
20.62
0.06
8−Nov−16
19.39
0.06
15−Feb−16
20.33
2−Mar−17
10.29
10.00
15−Mar−17
11.07
Calculate the dividend yield, capital gains yield, and realized
return between each set of dates. (18 points)
Calculate the realized return for the whole...
You wish to test the claim that the first population mean is greater than the second...
You wish to test the claim that the first population mean is
greater than the second population mean at a significance level of
α=0.005
Ho:μ1=μ2
Ha:μ1>μ2
You obtain the following two samples of data.
Sample #1
Sample #2
57.7
63.3
64.3
70.1
53.6
69.6
72.2
67.3
70.1
31.0
55.7
63.8
71.4
71.4
83.6
87.9
102.3
34.9
84.5
75.1
78.5
58.8
What is the test statistic for this sample?
test statistic = _____________ Round to 3 decimal
places.
What is the...
You wish to test the claim that the first population mean is less than the second...
You wish to test the claim that the first population mean is
less than the second population meanat a significance level of
α=0.001α=0.001.
Ho:μ1=μ2Ho:μ1=μ2
Ha:μ1<μ2Ha:μ1<μ2
You obtain the following two samples of data.
Sample #1
Sample #2
43.3
56.2
64.2
49.7
95.4
61.0
85.0
49.1
50.9
49.1
61.0
63.2
72.7
81.7
41.4
55.8
54.5
83.6
93.5
79.2
74.9
77.8
49.8
48.8
43.5
90.5
90.5
76.2
47.7
What is the test statistic for this sample?
test statistic = Round to 3...
You wish to test the claim that the first population mean is greater than the second...
You wish to test the claim that the first population mean is
greater than the second population mean at a significance level of
α=0.10
.
Ho:μ1=μ2
Ha:μ1>μ2
You obtain the following two samples of data.
Sample #1
Sample #2
76.2
68.1
90.1
74.7
77.1
72.9
70.3
84.0
75.9
80.1
65.7
80.1
76.2
82.0
81.7
74.5
75.1
73.3
45.5
47.8
46.1
55.5
53.7
40.0
67.4
54.6
What is the test statistic for this sample?
test statistic = Round to 3...
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