A company claims that each bag of pretzels weighs 11.3 oz. A sample of 37 bags was weighed. The mean weight of these bags was 11.05 oz, with a standard deviation of Test the hypothesis at a 5% level of significance.
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A: As per our company guideline expert have to answer first three subparts only dear student please…
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Q: The Dodge Reports are used by many companies in the construction field to estimate the time required…
A: The sample mean is 10.3 and the standard deviation is 4.2.The hypothesized mean is 9.The sample size…
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A: a) Assume that μ is the population mean cost of flowers for a wedding.
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A: Hypotheses: Null hypothesis: µ ≥ 850. That is, the mean cotton yield per acre is not less than 850…
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A: Given information Sample mean x̅ = 31.2 miles/gallon Population mean µ = 31.0 miles/gallon Sample…
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A: H0 : ? =10 H1 : ? <10 Population mean = ? = 10 Sample S.D = s =0.4 Sample size = n =19…
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A: The summary of the statistics is, x¯=$123.87,s=$17,n=38,μ=$117.91 The claim of the hypothesis test…
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A: Solution-: Given: x¯=17.7,μ0=16.3,n=40,s=1.8,α=0.05 Claim: The average number of infections per week…
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A: From the provided information, Population standard deviation (σ) = 8 Sample mean (x̄) = 108 Sample…
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A: Population mean (µ) = 27.5Standard deviations (σ) = 5.2Sample size (n) = 15Sample mean (x̅) = 29.6…
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A: Given that,population mean(u)=10sample mean, x =9.8standard deviation, s =0.3number (n)=24
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Q: a) Identify the null and alternative hypotheses? Họ: ? v b) What type of hypothesis test should you…
A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…
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A: Given that Sample size n =210 Sample mean=33.1 Population standard deviation =1.9
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A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…
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- A second species of extra-terrestrial has a mean height of 71cm and a standard deviation of 5.3cm. An astro biologist discovers that 30% of the extra-terrestrials bump their heads when they enter their spacecraft. What is the height of the door to the space craft?The America Automobile Association reported that the mean price of a gallon of regular grade gasoline in the United States in October 2020 was $2.82. An economist is interested in determining whether the mean price of regular grade gasoline is cheaper (less than) in New York State. To test this, the economist sample 50 gas stations in NY and find the mean price of regular grade gasoline to be $2.77. Assume the standard deviation for the price of regular grade gasoline is $0.15. Use the critical value method to perform a hypothesis test at the 0.05 level of significance. a) what is the conclusion for this test?An employer claims that full time employees have a mean income of $35,000. A sample of 200 employees was considered. Their mean salary was $34,000. Assuming a population standard deviation of $4,000. Does her claim seem reasonable at a 0.05 level of significance?
- According to a government agency, the average workweek for an adult in February 2018 was 34.1 hours. Assume the population standard deviation for the number of hours worked per week is 4.0 hours. A random sample of 35 adults worked an average of 34.8 hours last week.The America Automobile Association reported that the mean price of a gallon of regular grade gasoline in the United States in October 2020 was $2.82. An economist is interested in determining whether the mean price of regular grade gasoline is cheaper (less than) in New York State. To test this, the economist sample 50 gas stations in NY and find the mean price of regular grade gasoline to be $2.77. Assume the standard deviation for the price of regular grade gasoline is $0.15. Use the critical value method to perform a hypothesis test at the 0.05 level of significance. a. Define the parameter we are testing and setup a hypothesis test to see if the mean price of gas is cheaper in NY compared to the national mean: b. Calculate the test statistics for this hypothesis test. c.What is the critical value for this hypothesis test?The U.S. Census Bureau reported that the mean area of U.S. homes built in 2012 was 2505 square feet. A simple random sample of 17 homes built in 2013 had a mean area of 2666 square feet with a standard deviation of 212 feet. Can you conclude that the mean area of homes built in 2013 is greater than the mean area of homes built in 2012? It has been confirmed that home sizes follow a normal distribution. Use a 10% significance level.Round to the fourth H0= HA= Test Statistic= P-value= Did something significant happen? Select the Decision Rule: There ( is or is not) enough evidence to conclude that the mean area of homes built in 2013 were (equal or greater) to the homes built in 2012?
- Systolic blood pressure levels above 120 mm Hg are considered to be high. For the 100 systolic blood pressure levels listed in the accompanying data set, the mean is 123.52000 mm Hg and the standard deviation is 16.93510 mm Hg. Assume that a simple random sample has been selected. Use a 0.01 significance level to test the claim that the sample is from a population with a mean greater than 120 mm Hg. Click the icon to view the data set of systolic blood pressure levels. Identify the null and alternative hypotheses. Ho: H;: (Type integers or decimals. Do not round.) Identify the test statistic. (Round to two decimal places as needed.) Identify the P-value. (Round to three decimal places as needed.) State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. the null hypothesis. There sufficient evidence at the 0.01 significance level to the claim that the sample is from a population with a mean systolic blood pressure level greater…An editor for a large book distributor claims the mean time required to write a textbook is at least 32 months. A sample of 49 textbook authors found that the mean time taken to write a textbook was 35 months with a standard deviation of 6.8 months. Using a 2.5% significance level, would you conclude that the editor's claim is true?It is commonly believed that the mean body temperature of a healthy adult is 98.6°F. You are not entirely convinced. You believe that it is not 98.6° F. You collected data using 52 healthy people and found that they had a mean body temperature of 98.25° F with a standard deviation of 1.2° F. Use a 0.05 significance level to test the claim that the mean body temperature of a healthy adult is not 98.6°F. a) kdentify the null and alternative hypotheses? Họ:p=v 98.6 H.: pA food company claims that their packets of chips have an average weight of 50g. A consumer advocacy group takes a random sample of 25 packets and finds that the average weight is 49.8g with a standard deviation of 0.9g. Can the consumer advocacy group reject the claim of the food company at a significance level of 0.05?A "12 Oz" jar of a local brand of peanut is less than this value. The Better Business bureau selected a sample of 20 jars. The sample showed an average net weight of 11.80 ounces and a standard deviation of 0.4 ounce. Using a 0.02 level of significance, what would the Bureau conclude about the operation of the local firm?It is said that a person’s height changes from morning to night, possibility in response to gravity compressing the spinal columns and the joints in the legs. The height of 14 persons (an equal number of men and women) were measured in the morning and at night and it was discovered that the average height in the morning was 1.750 m and 1.735 m. The mean change in height was 1.5 cm with a sample standard deviation of 3 cm. Any height change in the human population is known to be distributed normally. Is it correct to say that the true average change in height from morning to night is 2.5 cm with a significance level of 0.1)?SEE MORE QUESTIONS