# Which answer is correct? (null and alternative hypothesis) related questions

• 1Which answer is correct? (null and alternative hypothesis)

A computer chip manufacturer makes an extremely fast computerchip for spy satellites. Because this chip is so powerful the yieldis only 4%. That is, only 4% of thechips produced can be used inthe satellite. They hope to improve that yield rate. Afterimplementing several new manufacturing procedures, the companyreevaluatedits yield rate using a random sample of 352 chips andfound the yield rate to now be 5%. What is the appropriatehypothesis?A) H0: p = 0.04; HA: p≠ 0.04; z = 1.07; P-value = 0.2846B) H0: p = 0.04; HA: p < 0.04; z =1.07; P-value = 0.8577C) H0: p = 0.04; HA: p > 0.04; z =0.96; P-value = 0.1685D) H0: p = 0.04; HA: p < 0.04; z =-1.07; P-value = 0.8577E) H0: p = 0.04; HA: p > 0.04; z =-1.07; P-value = 0.1423

• 2What is the correct null and alternative hypothesis statements?

The FDA recommends that Americans get on average 3,000mg of salt in their daily diet. Suppose that you are interested in testing if Americans' average daily intake isdifferent from 3,000mg. What is the correct null and alternative hypothesis statements?A. Ho:mu = 3000 Ha:mu > 3000B. Ho:mu = 3000 Ha:mu < 3000C. Ho:mu = 3000 Ha:mu does not equal 3000D. Ho:xbar = 3000 Ha:xbar > 3000E. Ho:xbar = 3000 Ha:xbar > 3000F. Ho:xbar = 3000 Ha:xbar > 3000

• 3Can you provide me 3 Null Hypothesis & and under each null hypothesis, 3 alternative hypothesis...

Can you provide me 3 Null Hypothesis &and under each null hypothesis, 3 alternative hypothesis as well. hypothesis that are logical and rationalthanksNull hypothesis _______________________________Alternative hypothesis ________________________Alternative hypothesis ________________________Alternative hypothesis ________________________Null hypothesis _______________________________Alternative hypothesis ________________________Alternative hypothesis ________________________Alternative hypothesis ________________________Null hypothesis _______________________________Alternative hypothesis ________________________Alternative hypothesis ________________________Alternative hypothesis ________________________:]

• 4What is the alternative hypothesis for a null hypothesis saying the average time a person keeps a cell phone is at most three years

What is the alternative hypothesis for a null hypothesis saying the average time a person keeps a cell phone is at most three years? Some one please help. Thank you.

• 5null and alternative hypothesis, p value, remaining hypothesis testing steps

Your search A local fast food chain has partnered with its beef supplier. The chain purchases beef in packages of 10 lbs. It does not wish to accept underweightpackages of beef. A sample of 40 packages shows an average weight of 9.95 lbs. with a standard deviation of .1 lbs. a.) State the null and alternative hypotheses_________________ b.) Complete the remaining hypothesis testing steps using a=.05 Critical Values ____________ Test Statistic ______________ c.) Find the P-Value_____________ State your conclusion.

• 6Null Hypothesis / Alternative Hypothesis (multipart question #3)

An entrepeneur is considering the purchase of a coin-operated laundry. The current owner claims that over the past 5 years, the mean daily revenue was \$675 with astandard deviation of \$75. A sample of 30 days reveals a daily mean revenue of \$625.Using a .01 level of significance, is there evidence of that the daily mean revenue was \$675?a.) State the null hypothesisb.) State the alternative hypothesisc.) What critical values should be used?d) What is the test statistic?e.) What is the p-value?f.) Interpret the meaning of the p-valueg) Should the null hypothesis be rejected?h) What is the conclusion?i) state one of the assumptions neededI REALLY DO VERY MUCH APPRECIATE YOUR ASSISTANCE.PLEASE SHOW ME THE FORMULAS AND THE WORK SO i CAN TRY TO RECREATE MOST OF THIS IN PHSTATS.THANK YOU VERY MUCH

• 7Null Hypothesis / Alternative Hypothesis (multipart question)

A major DVD rental chain is considering opening a new store in an area that currently does not have any such stores.The chain will open if there is evidencethat more than 5,000 of the 20,000 households in the area are equipped with DVD players.It conducts a telephone poll of 300 randomly selected households inthe area and finds that 96 have DVD players.If you were to conduct a test to determine whether there is evidence that the proportion is different from 0.25,a.) State the null hypothesisb.) State the alternative hypothesisc.) What critical values should be used?d.) What is the test statistic?e.) What is the p-value?f.) Interpret th emeaning of the p-valueg.) Should the null hypothesis be rejected?h.) What is the conclusion?i.) State one of the assumptions needTHANK YOU SO MUCH FOR YOUR HELP!PLEASE SHOW ME THE FORMULAS (SHOW THE WORK). I NEED TO TRY TO PLUG THIS INTO PHSTAT FOR EXCEL

• 8Null and alternative hypothesis!

QUESTION 1Given: Ho: p = .4 Ha: p: not equal to.4 ,Y = # of successes in a sample of size n = 9(a) Let the decision rule be to reject H0 if either Y = c1 or Y = c2.Find a rejection region so a is as close as possible to .01 but not exceeding .01..Using the test you set up in (a), answer (b)-(e) below.(b What is the probability of making a type 1 error?(c) Find type II error rate if in fact the true value of p is .7 .(c) Find the power of the test when p = .7 .(d) If X is observed to be yo = 6,(i) What is your decision?(ii) What type of error are you subject to?(iii) What is the p-value?(e) Suppose the true value of p is .5. What is the probability this test will lead to an incorrect decision?

• 9null and alternative hypothesis

In the past, the mean running time for a certain type of flashlight battery has been 8.4 hours. The manufacturer has introduced a change in the production method andwants to perform a hypothesis test to determine whether the mean running time has increased as a result. The hypotheses are:H0: µ = 8.4 hoursHa: µ > 8.4 hourswhere µ is the mean running time of the new batteries. Explain the meaning of a Type II error.

• 10Null and Alternative Hypothesis.

Whats worng? Here are several situations where there is an incorect application of ideas presented in this section. WRITE A SHORT PARAGRAPH EXPLAINING WHAT ISWRONG IN EACH SITUATION AND WHY IT IS WRONG?a) A random sample of size 20 is taken from a population that is assumed to have a standard deviation of 12. The standard deviation of the sample mean is12/20.b) A researcher tests the following null hypothesis Ho: xbar = 10.c) A study with xbar = 48 reports statistical significance for Ha = mu(u) > 54.d) A researcher tests the hypothesis Ho: mu (u) = 50 and concludes that the population mean is equal to 50.

• 11null and alternative hypothesis

Suppose we want to test the claim that the proportion of people age 18-25 in the US whocurrently use illicit drugs is equal to 20%.A) Identify the null hypothesis and alternative hypothesis.B) Data from a survey of 10,000 subjects of age 18-25 shows 2334 subjects currently use illicitdrug. Find the test statistic.C)State the nal conclusion, use a 1% signicance level.

• 12null and alternative hypothesis

The manager of a local grocery store believes that the store's average daily sales are more than \$8000 a day. To test this belief, a sample of 39 days of sales wasselected; and it was found that the average sale was \$8,250 with a standard deviation (of the sample) of \$1200. Identify null and alternative hypothesis, thencalculate the appropriate test statistic and write a conclusion 0.5