A pharmaceutical company sells a tablet for treating colds. After extensive experimentation, researchers at the pharmaceutical company have developed a new formula for the tablet. The researchers suspect that the mean recovery time of all patients treated with the old tablet is more than the mean recovery time of all patients who are treated with the new tablet. To see if this is true, a random selection of volunteers were exposed to a typical cold virus. After they started to have cold symptoms, 15 of them were given the old tablet. The remaining 15 volunteers were given the new tablet. For each individual, the length of time taken to recover from the cold was recorded. At the end of the experiment the following data were obtained. Days to recover from a cold Treated with old tablet 4.5, 8.6, 7.5, 7.7, 5.6, 6.1, 9.7, 5.7, 5.6, 5.0, 5.9, 5.5, 5.0, 4.0, 6.5 Treated with new tablet 4.0, 4.0, 4.3, 6.2, 4.7, 5.0, 5.2, 6.6, 6.0, 4.1, 5.7, 3.2, 4.7, 4.4, 5.2 Send data to calculator V Send data to Excel It is known that the population standard deviation of the recovery time from a cold is 1.8 days when treated with the old tablet, and the population standard deviation of the recovery time from a cold is 1.5 days when treated with the new tablet. It is also known that both populations are approximately normally distributed. At the 0.01 level of significance, is there enough evidence to support the claim that the mean recovery time, H₁, of all patients treated with the old tablet is more than the mean recovery time, μ₂, of all patients treated with the new tablet? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to at least three decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H₁. μ Р H: ê H₁ :D (b) Determine the type of test statistic to use. (Choose one) ▼ (c) Find the value of the test statistic. (Round to three or more decimal places.) 0 decimal places XI 09 4 a X S On 0=0 OSO 0*0 Ã 0<0 S olc 20 □<口 ?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
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A pharmaceutical company sells a tablet for treating colds. After extensive experimentation, researchers at the pharmaceutical company have developed a new
formula for the tablet. The researchers suspect that the mean recovery time of all patients treated with the old tablet is more than the mean recovery time of all
patients who are treated with the new tablet. To see if this is true, a random selection of volunteers were exposed to a typical cold virus. After they started to
have cold symptoms, 15 of them were given the old tablet. The remaining 15 volunteers were given the new tablet. For each individual, the length of time taken
to recover from the cold was recorded. At the end of the experiment the following data were obtained.
Days to recover from a cold
Treated with old tablet 4.5, 8.6, 7.5, 7.7, 5.6, 6.1, 9.7, 5.7, 5.6, 5.0, 5.9, 5.5, 5.0, 4.0, 6.5
Treated with new tablet 4.0, 4.0, 4.3, 6.2, 4.7, 5.0, 5.2, 6.6, 6.0, 4.1, 5.7, 3.2, 4.7, 4.4, 5.2
Send data to calculator V
Send data to Excel
It is known that the population standard deviation of the recovery time from a cold is 1.8 days when treated with the old tablet, and the population standard
deviation of the recovery time from a cold is 1.5 days when treated with the new tablet. It is also known that both populations are approximately normally
distributed. At the 0.01 level of significance, is there enough evidence to support the claim that the mean recovery time, μ₁, of all patients treated with the old
tablet is more than the mean recovery time, μ2, of all patients treated with the new tablet? Perform a one-tailed test. Then complete the parts below.
Carry your intermediate computations to at least three decimal places. (If necessary, consult a list of formulas.)
(a) State the null hypothesis Ho and the alternative hypothesis H₁.
0
μ
O
р
S
Ho :D
H₁ :
믐
(b) Determine the type of test statistic to use.
0=0 OSO 0≥0
(Choose one)
(c) Find the value of the test statistic. (Round to three or more decimal places.)
0<0
☐#0
X
?
(d) Find the critical value at the 0.01 level of significance. (Round to three or more decimal places.)
0
(e) Can we support the researchers' claim that the mean recovery time when treated with the old
tablet is more than the mean recovery time when treated with the new tablet?
Explanation
Check
2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility
XI
8
<Q
0<0
Transcribed Image Text:A pharmaceutical company sells a tablet for treating colds. After extensive experimentation, researchers at the pharmaceutical company have developed a new formula for the tablet. The researchers suspect that the mean recovery time of all patients treated with the old tablet is more than the mean recovery time of all patients who are treated with the new tablet. To see if this is true, a random selection of volunteers were exposed to a typical cold virus. After they started to have cold symptoms, 15 of them were given the old tablet. The remaining 15 volunteers were given the new tablet. For each individual, the length of time taken to recover from the cold was recorded. At the end of the experiment the following data were obtained. Days to recover from a cold Treated with old tablet 4.5, 8.6, 7.5, 7.7, 5.6, 6.1, 9.7, 5.7, 5.6, 5.0, 5.9, 5.5, 5.0, 4.0, 6.5 Treated with new tablet 4.0, 4.0, 4.3, 6.2, 4.7, 5.0, 5.2, 6.6, 6.0, 4.1, 5.7, 3.2, 4.7, 4.4, 5.2 Send data to calculator V Send data to Excel It is known that the population standard deviation of the recovery time from a cold is 1.8 days when treated with the old tablet, and the population standard deviation of the recovery time from a cold is 1.5 days when treated with the new tablet. It is also known that both populations are approximately normally distributed. At the 0.01 level of significance, is there enough evidence to support the claim that the mean recovery time, μ₁, of all patients treated with the old tablet is more than the mean recovery time, μ2, of all patients treated with the new tablet? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to at least three decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H₁. 0 μ O р S Ho :D H₁ : 믐 (b) Determine the type of test statistic to use. 0=0 OSO 0≥0 (Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) 0<0 ☐#0 X ? (d) Find the critical value at the 0.01 level of significance. (Round to three or more decimal places.) 0 (e) Can we support the researchers' claim that the mean recovery time when treated with the old tablet is more than the mean recovery time when treated with the new tablet? Explanation Check 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility XI 8 <Q 0<0
Y
It is known that the population standard deviation of the recovery time from a cold is 1.8 days when treated with the old tablet, and the population stand
deviation of the recovery time from a cold is 1.5 days when treated with the new tablet. It is also known that both populations are approximately normal
distributed. At the 0.01 level of significance, is there enough evidence to support the claim that the mean recovery time, μ₁, of all patients treated with t
tablet is more than the mean recovery time, μ₂, of all patients treated with the new tablet? Perform a one-tailed test. Then complete the parts below.
Carry your intermediate computations to at least three decimal places. (If necessary, consult a list of formulas.)
(a) State the null hypothesis Ho and the alternative hypothesis H₁.
μ σ p
Ho
X S
H₁ :D
0
(b) Determine the type of test statistic to use.
(Choose one)
(c) Find the value of the test statistic. (Round to three or more decimal places.)
(d) Find the critical value at the 0.01 level of significance. (Round to three or more decimal places.)
0
(e) Can we support the researchers' claim that the mean recovery time when treated with the old
tablet is more than the mean recovery time when treated with the new tablet?
Yes No
Explanation
Check
0=0
0#0
X
<Q
3
O≤O 0²0
0<0
□<口
5 ?
2022 McGraw Hill LLC. All Rights Reserved.
Terms of Use | Privacy Cente
Transcribed Image Text:Y It is known that the population standard deviation of the recovery time from a cold is 1.8 days when treated with the old tablet, and the population stand deviation of the recovery time from a cold is 1.5 days when treated with the new tablet. It is also known that both populations are approximately normal distributed. At the 0.01 level of significance, is there enough evidence to support the claim that the mean recovery time, μ₁, of all patients treated with t tablet is more than the mean recovery time, μ₂, of all patients treated with the new tablet? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to at least three decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H₁. μ σ p Ho X S H₁ :D 0 (b) Determine the type of test statistic to use. (Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the critical value at the 0.01 level of significance. (Round to three or more decimal places.) 0 (e) Can we support the researchers' claim that the mean recovery time when treated with the old tablet is more than the mean recovery time when treated with the new tablet? Yes No Explanation Check 0=0 0#0 X <Q 3 O≤O 0²0 0<0 □<口 5 ? 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Cente
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