Energetic Co., a battery manufacturer, claims their battery lasts for 61.51 months with a standard deviation...
Energetic Co., a battery manufacturer, claims their battery lasts for 61.51 months with a standard deviation of 9.112 months. You randomly sample 24 of these batteries. Assuming the distribution for the battery lifetime is approximately normal, what is the probability the average lifetime is less than 59.44? Question 9 options: 1) 0.8671 2) 0.4101 3) 0.1155 4) 0.5899 5) 0.1329
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Energetic Co., a battery manufacturer, claims their battery
lasts for 61.51 months with a standard deviation...
NeverReady batteries has engineered a newer, longer lasting AAA battery. The company claims this battery has...
NeverReady batteries has engineered a newer, longer lasting AAA battery. The company claims this battery has an average life span of 18 hours with a standard deviation of 0.7 hours. Your statistics class questions this claim. As a class, you randomly select 30 batteries and find that the sample mean life span is 17.7 hours. If the process is working properly, what is the probability of getting a random sample of 30 batteries in which the sample mean lifetime is...
NeverReady batteries has engineered a newer, longer-lasting AAA battery. The company claims this battery has an...
NeverReady batteries has engineered a newer, longer-lasting AAA battery. The company claims this battery has an average life span of 17 hours with a standard deviation of 0.8 hours. Your statistics class questions this claim. You randomly select 30 batteries and find that the sample mean life span is 16.7 hours. If the process is working properly, What is the probability of getting a random sample of 30 batteries in which the sample mean lifetime is 16.7 hours or less?...
QUESTION 10 NeverReady batteries has engineered a newer, longer-lasting AAA battery. The company claims this battery...
QUESTION 10 NeverReady batteries has engineered a newer, longer-lasting AAA battery. The company claims this battery has an average life span of 17 hours with a standard deviation of 0.8 hours. Your statistics class questions this claim. You randomly select 30 batteries and find that the sample mean life span is 16.7 hours. If the process is working properly, What is the probability of getting a random sample of 30 batteries in which the sample mean lifetime is 16.7 hours...
The manufacturer of a certain brand of auto batteries claims that the mean life of these...
The manufacturer of a certain brand of auto batteries claims that the mean life of these batteries is 45 months. A consumer protection agency that wants to check this claim took a random sample of 24 such batteries and found that the mean life for this sample is 43.35 months. The lives of all such batteries have a normal distribution with the population standard deviation of 4.5 months. Find the p-value for the test of hypothesis with the alternative hypothesis...
9.25 The manufacturer of a certain brand of auto batteries claims that the mean life of...
9.25 The manufacturer of a certain brand of auto batteries claims that the mean life of these batteries is 45 months. A consumer protec- tion agency that wants to check this claim took a random sample of 24 such batteries and found that the mean life for this sample is 43.05 months. The lives of all such batteries have a normal distribution with the population standard deviation of 4.5 months. a. Find the p-value for the test of hypothesis with...
The manufacturer of a sports car claims that the fuel injection system lasts 48 months before...
The manufacturer of a sports car claims that the fuel injection
system lasts 48 months before it needs to be replaced. A consumer
group tests this claim by surveying a random sample of 10 owners
who had the fuel injection system replaced. The ages of the cars at
the time of replacement were (in months):
27
44
43
48
53
46
30
51
42
52
(i) Use your calculator to calculate the mean age of a car when
the fuel...
A tablet advertises that it has an all-day battery. The company claims that their battery will...
A tablet advertises that it has an all-day battery. The company
claims that their battery will expectedly last 24 hours. Batteries
of that capacity are assumed to have lives that are normally
distributed with (known) standard deviation equal to 1.25 hours. A
random sample of 10 batteries has a sample average life of 23.2
hours. Answer the following questions.
(a) Using α = 0.05, can you support the claim that battery life
is below 24 hours? Hint: Formulate the problem...
1. Suppose that the length of time a particular type of battery lasts follows an exponential...
1. Suppose that the length of time a particular type of battery lasts follows an exponential distribution with a mean of 25.0 days. Find the probability that the average time a sample of 49 batteries lasts is at most 24.7 days a. 0.4665 b. 0.3723 c. 0.6277 d. 0.5335 2. Suppose that the length of time a particular type of battery lasts follows an exponential distribution with a mean of 25.0 days. Suppose the length of time a battery lasts...
QUESTION 11 A full charged battery of a given mobile phone lasts a time T under...
QUESTION 11 A full charged battery of a given mobile phone lasts a time T under full utilization It was found that this lifetime T is normally distributed with a mean of 180 min and standard deviation of 20min. What value of lifetime in minutes is exceeded with 90% probability? 120.5 mn 134.4 mn 143.6 mn 154.3 mm 161.3 mn QUESTION 12 A full charged battery of a given mobile phone lasts a time T under full utilization It was...
NeverReady batteries has engineered a newer, longer-lasting AAA battery. This battery has an average life span...
NeverReady batteries has engineered a newer, longer-lasting AAA battery. This battery has an average life span of 17 hours with a standard deviation of 0.8 hours. Assume that the lifetime is distributed approximately normally. What is the probability of getting a battery with lifetime16 hours or less? (Round to 3 decimal places) NeverReady batteries has engineered a newer, longer-lasting AAA battery. This battery has an average life span of 17 hours with a standard deviation of 0.8 hours. Assume that...
QUESTION 10 NeverReady batteries has engineered a newer, longer-lasting AAA battery. The company claims this battery has an average life span of 17 hours with a standard deviation of 0.8 hours. Your statistics class questions this claim. You randomly select 30 batteries and find that the sample mean life span is 16.7 hours. If the process is working properly, What is the probability of getting a random sample of 30 batteries in which the sample mean lifetime is 16.7 hours...
9.25 The manufacturer of a certain brand of auto batteries claims that the mean life of these batteries is 45 months. A consumer protec- tion agency that wants to check this claim took a random sample of 24 such batteries and found that the mean life for this sample is 43.05 months. The lives of all such batteries have a normal distribution with the population standard deviation of 4.5 months. a. Find the p-value for the test of hypothesis with...
The manufacturer of a sports car claims that the fuel injection
system lasts 48 months before it needs to be replaced. A consumer
group tests this claim by surveying a random sample of 10 owners
who had the fuel injection system replaced. The ages of the cars at
the time of replacement were (in months):
27
44
43
48
53
46
30
51
42
52
(i) Use your calculator to calculate the mean age of a car when
the fuel...
A tablet advertises that it has an all-day battery. The company
claims that their battery will expectedly last 24 hours. Batteries
of that capacity are assumed to have lives that are normally
distributed with (known) standard deviation equal to 1.25 hours. A
random sample of 10 batteries has a sample average life of 23.2
hours. Answer the following questions.
(a) Using α = 0.05, can you support the claim that battery life
is below 24 hours? Hint: Formulate the problem...
QUESTION 11 A full charged battery of a given mobile phone lasts a time T under full utilization It was found that this lifetime T is normally distributed with a mean of 180 min and standard deviation of 20min. What value of lifetime in minutes is exceeded with 90% probability? 120.5 mn 134.4 mn 143.6 mn 154.3 mm 161.3 mn QUESTION 12 A full charged battery of a given mobile phone lasts a time T under full utilization It was...
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