plants are treated with a certain chemical differs from 199. State the ne ative hypothesis H, that we would use for this test. OSO O20

A mail-order catalog claims customers will receive their product within 4 days of ordering. A competitor believes that this claim is an underestimate. The competitor test the following hypothesis H0: mu = 4 versus Ha: mu > 4. Determine the type one error. Group of answer choices A. Type I error occurs if the competitor would conclude that mu > 4 when, in fact, mu > 4. B. Type I error occurs if the competitor would conclude that mu > 4 when, in fact, mu = 4. C. Type I error occurs if the competitor would not conclude that mu > 4 when, in fact, mu > 4. D. Type I error occurs if the competitor would not conclude mu > 4 when, in fact, mu = 4.

Suppose P(A) = P(B) = 0.25 and P(AUB) = 0.45. What is P(AN B)?

In a recent year, the mean weight of newborn boys in a certain country was  7.5 pounds. A doctor wants to know whether the mean weight of newborn girls differs from this. State the appropriate null and alternate hypotheses.   The null hypothesis is  :H0μ  ▼(Choose one)      .The alternate hypothesis is  :H1μ  ▼(Choose one)      .

Suppose IQ scores were obtained for 20 randomly selected sets of siblings. The 20 pairs of measurements yield x = 100.88, y = 100.55, r= 0.917, P-value = 0.000, and y= -6.07 + 1.06x, where x represents the IQ score of the younger child. Find the best predicted value of y given that the younger child has an IQ of 110? The best predicted value of y is (Round to two decimal places as needed.) Question Viewer Enter your answer in the answer box. ? search 60%

An alloy manufacturer is investigating if they can improve the strength of one of their alloysby producing it at a lower temperature. To investigate that, they produce the alloy at twodifferent temperatures (high and low) and then measure the breaking strength of randomsamples of specimens from each. The following table represents the strength of the randomsamples at the higher and lower temperature, in units of 0.001-inch deflection.  Temp. Strength (0.001 inch)High 87 64 66 85 76 49 97 73 75 77 69 68 89 27 58 84Low 88 82 81 85 79 80 88 78 77 85 79 76 Do the results support the hypothesis that lowering the production temperature can improve thestrength of the alloy, with 95% confidence? (Hint: Don’t forget investigating variances. Use 98% confidence for that.)

a random sample of n = 25 individuals is selected from a population with u = 20 and a treatment administered to each individual in the sample. After treatment the sample mean is found to be m =22.2 with SS =384. a) how much difference is there between the mean for the treated sample and the mean for the original population? (Note: in a hypothesis test this value forms the numerator of the drastic). b) if there is no treatment effect how much difference is expected between the sample mean and is population mean? That is to find the standard error for m. c) based on the sample data does a treatment have a significant effect? use a two tailed test with (x = 0.05.

The mean salary of federal government employees on the General Schedule is $59,593. The average salary of 34 state employees who do similar work is $59,070 with =σ $1500. At the 0.10 level of significance, can it be concluded that state employees earn on average less than federal employees? State the hypotheses and identify the claim with the correct hypothesis.

Katie is interested if an association exists between age and sleep habits. She selects a random sample of 68 adults in three age groups and determines whether they sleep less than 7 hours, between 7 and 8 hours, or more than 8 hours each night. She would like to determine if there is convincing evidence of an association. Let  = 0.05. What are the hypotheses for this test? H0: There is an association between age and sleep habits.Ha: There is no association between age and sleep habits. H0: There is no association between age and sleep habits.Ha: There is an association between age and sleep habits. H0: There is no difference in the distribution of age and sleep habits.Ha: There is a difference in the distribution of age and sleep habits. H0: There is a difference in the distribution of age and sleep habits.Ha: There is no difference in the distribution of age and sleep habits.

A research center claims that 31 % of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 700 adults in that country, 33% say that they would travel into space on a commercial flight if they could afford it. At a 0.01, is there enough evidence to reject the research center's claim? Complete parts (a) through (d) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) OA. % of adults in the country would travel into space on a commercial flight if they could afford it. dd tbo OB. The percentage adults in the country who would travel into space on a commercial flight if they could afford it is not %. O C. No more than % of adults in the country would travel into space on a commercial flight if they could afford it. D. At least 31 % of adults in the country…