At α=0.03​, can you reject the​ claim? ​(a) Identify the null hypothesis and alternative hypothesis. A. H0​: μ=3.4 Ha​: μ≠3.4 Your answer is correct. B. H0​: μ>3.4 Ha​: μ≤3.4 C. H0​: μ≤3.3 Ha​: μ>3.3 D. H0​: μ≤3.4 Ha​: μ>3.4 E. H0​: μ>3.3 Ha​: μ≤3.3 F. H0​: μ≠3.3 Ha​: μ=3.3 ​(b) Identify the standardized test statistic. z=negative 0.93−0.93 ​(Round to two decimal places as​ needed.) ​(c) Find the​ P-value. 0.3520.352 ​(Round to three decimal places as​ needed.) ​(d) Decide whether to reject or fail to reject the null hypothesi

Q P.15: According to a theater, about 8% of all people who buy a ticket to a performance arrive late. Find the mea and standard deviation of the number of people who are late if 300 tickets have been sold. A The mean is µ 300 · 0. 08 = 24. The standard deviation is o = v300 · 0. 08 · 0. 92 z 4. 70. В The mean is u = V300 · 0. 08 · 0. 92 2 4. 70. The standard deviation is o = 300 · 0. 08 = 24. The mean is µ 300 · 0. 08 · 0. 92 = 22. 08. The standard deviation is o = 300 · 0. 92 = 276. The mean is u = 300 · 0. 92 = 276. The standard deviation is o = 300 · 0. 08 · 0.92 = 22. 08. %3D E The mean is u 300 · 0. 08 = 24. The standard deviation is o = 300 · 0. 08 · 0. 92 = 22. 08. %3D

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=72.1σ=72.1. You would like to be 99% confident that your estimate is within 2 of the true population mean. How large of a sample size is required?

67°F Cloudy BIG Corporation advertises that its light bulbs have a mean lifetime, u, of 3000 hours. Suppose we have good reason to believe that u is less than 3000 hours and decide to do a statistical test of the claim. We choose a random sample of light bulbs manufactured by BIG and find that the mean lifetime for this sample is 2840 hours and that the sample standard deviation of the lifetimes is 750 hours. Based on this information, complete the parts below. (a) What are the null hypothesis Ho and the alternative hypothesis H₁ that should be used for the test? 0 H₂:0 H₁ (b) Suppose that we decide not to reject the null hypothesis. What sort of error might we be making? (Choose one) ▼ (c) Suppose the true mean lifetime of BIG's light bulbs is 2820 hours. Fill in the blanks to describe a Type II error. A Type II error would be (Choose one) the hypothesis that u is (Choose one) (Choose one) ▼ when, in fact, μ is (Choose one) Explanation Check 9 DALL μχ 0O #0 Españ ? Aa 2022 McGraw Hill…

You want to obtain a sample to estimate how much parents spend on their kid's birthday parties. Based on the previous study, you believe the population standard deviation is approximately σ=63.1σ=63.1 dollars. You would like to be 90% confident that your estimate is within 2.5 dollar(s) of average spending on birthday parties. How many parents do you have to sample?

A nutritionist claims that the mean tuna consumption by a person is 3.4 pounds per year. A sample of 90 people shows that the mean tuna consumption by a person is 3.3 pounds per year. Assume the population standard deviation is 1.02 pounds. At α=0.03​, can you reject the​ claim?       ​(a) Identify the null hypothesis and alternative hypothesis.     A. H0​: μ=3.4 Ha​: μ≠3.4 Your answer is correct.   B. H0​: μ>3.4 Ha​: μ≤3.4   C. H0​: μ≤3.3 Ha​: μ>3.3   D. H0​: μ≤3.4 Ha​: μ>3.4   E. H0​: μ>3.3 Ha​: μ≤3.3   F. H0​: μ≠3.3 Ha​: μ=3.3 ​(b) Identify the standardized test statistic.   z=negative 1.34−1.34 ​(Round to two decimal places as​ needed.)

The mean score of a competency test is 77, with a standard deviation of 5. Use the empirical rule to find the percentage of scores between 72 and 82. (Assume the data set has a bell-shaped distribution.) O A. 95% O B. 50% O C. 99.7% O D. 68% Next 5:27 PM 59°F Clear A 11/23/2021 9 Type here to search Insert 々 F1 PrtSc F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 %23 1 2 6. Q E T Y + I/ * 00 因 44 %#3

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=67.7σ=67.7. You would like to be 95% confident that your estimate is within 1 of the true population mean. How large of a sample size is required? n =

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=46.9σ=46.9. You would like to be 95% confident that your estimate is within 2 of the true population mean. How large of a sample size is required?n =

A nutritionist claims that the mean tuna consumption by a person is 3.8 pounds per year. A sample of 70 people shows that the mean tuna consumption by a person is 3.5 pounds per year. Assume the population standard deviation is 1.04 pounds. At α=0.09​, can you reject the​ claim?     ​(a) Identify the null hypothesis and alternative hypothesis.     A. H0​: μ=3.8 Ha​: μ≠3.8   B. H0​: μ≠3.5 Ha​: μ=3.5   C. H0​: μ>3.5 Ha​: μ≤3.5   D. H0​: μ>3.8 Ha​: μ≤3.8   E. H0​: μ≤3.5 Ha​: μ>3.5   F. H0​: μ≤3.8 Ha​:μ>3.8   b) Identify the standardized test statistic. z= ​(Round to two decimal places as​ needed.)   (c) Find the​ P-value.   (d) Decide whether to reject or fail to reject the null hypothesis.     A. Reject H0. There is not sufficient evidence to reject the claim that mean tuna consumption is equal to 3.8pounds.   B. Reject H0. There is sufficient evidence to reject the claim that mean tuna consumption is equal to…